Proposals for CF

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126 proposals match your search

sea_surface_wave_directional_spread_at_variance_spectral_density_maximum

accepted
Proposer: Rob Thomas
Proposed Date: Sept. 28, 2018
Comments:
Units: degree (UAAA)
New Term
The quantity with standard name sea_surface_wave_directional_spread_at_variance_spectral_density_maximum is the directional spread of the most energetic waves. Directional spread is the (one-sided) directional width within a given sub-domain of the wave directional spectrum, S(t,x,y,f,theta) where t is time, x and y are horizontal coordinates (such as longitude and latitude), f is frequency and theta is direction. For a given mean wave (beam) direction the quantity approximates half the root mean square width about the beam axis, as derived either directly from circular moments or via the Fourier components of the wave directional spectrum.

platform_pitch_fore_down

accepted
Proposer: Alison Pamment
Proposed Date: Oct. 16, 2018
Comments: Add correct cross-reference to platform_pitch_fore_up in definition.
CF mailing list link: Standard names October update
Units: degree (UAAA)
Updated term description
Pitch is a rotation about an axis that is perpendicular to both the local vertical axis and the nominal forward motion direction of the platform. Pitch is relative to the "at rest" rotation of the platform with respect to the axis of rotation. The "at rest" rotation of the platform may change over time. "Fore down" indicates that positive values of pitch represent the front of the platform falling as viewed by an observer on top of the platform facing forward. The standard name platform_pitch_fore_up should be used for data having the opposite sign convention. The standard name platform_pitch should be chosen only if the sign convention of the data is unknown. A "platform" is a structure or vehicle that serves as a base for mounting sensors. Platforms include, but are not limited to, satellites, aeroplanes, ships, buoys, instruments, ground stations, and masts.

platform_surge

accepted
Proposer: Alison Pamment
Proposed Date: Oct. 16, 2018
Comments: Add missing sentence 'The "at rest" position of the platform may change over time' to the definition.
CF mailing list link: Standard names October update
Units: m (ULAA)
Updated term description
Surge is a displacement along an axis that is perpendicular to the local vertical axis and is coplanar with the nominal forward motion direction of the platform. Surge is relative to the "at rest" position of the platform with respect to the axis of displacement. The "at rest" position of the platform may change over time. The standard name platform_surge should be chosen only if the sign convention of the data is unknown. For cases where the sign convention of the surge is known, a standard name of platform_surge_fore or platform_surge_aft should be chosen, as appropriate. A "platform" is a structure or vehicle that serves as a base for mounting sensors. Platforms include, but are not limited to, satellites, aeroplanes, ships, buoys, instruments, ground stations, and masts.

platform_surge_fore

accepted
Proposer: Alison Pamment
Proposed Date: Oct. 16, 2018
Comments: Add missing sentence 'The "at rest" position of the platform may change over time' to the definition.
CF mailing list link: Standard names October update
Units: m (ULAA)
Updated term description
Surge is a displacement along an axis that is perpendicular to the local vertical axis and is coplanar with the nominal forward motion direction of the platform. Surge is relative to the "at rest" position of the platform with respect to the axis of displacement. The "at rest" position of the platform may change over time. "Fore" indicates that positive values of surge represent the platform moving forward as viewed by an observer on top of the platform facing forward. The standard name platform_surge_aft should be used for data having the opposite sign convention. The standard name platform_surge should be chosen only if the sign convention of the data is unknown. A "platform" is a structure or vehicle that serves as a base for mounting sensors. Platforms include, but are not limited to, satellites, aeroplanes, ships, buoys, instruments, ground stations, and masts.

platform_sway_rate

accepted
Proposer: Alison Pamment
Proposed Date: Oct. 16, 2018
Comments: Change 'yaw' to 'sway' in one sentence of the definition.
CF mailing list link: Standard names October update
Units: m s-1 (UVAA)
Updated term description
"Sway rate" is the rate of displacement along an axis that is perpendicular to both the local vertical axis and the nominal forward motion direction of the platform. Sway rate might not include changes to the "at rest" position of the platform with respect to the axis of displacement, which may change over time. The standard name platform_sway_rate should be chosen only if the sign convention of the data is unknown. For cases where the sign convention of the sway rate is known, a standard name of platform_sway_rate_starboard or platform_sway_rate_port should be chosen, as appropriate. A "platform" is a structure or vehicle that serves as a base for mounting sensors. Platforms include, but are not limited to, satellites, aeroplanes, ships, buoys, instruments, ground stations, and masts.

platform_surge_aft

accepted
Proposer: Alison Pamment
Proposed Date: Oct. 16, 2018
Comments: Add missing sentence 'The "at rest" position of the platform may change over time' to the definition.
CF mailing list link: Standard names October update
Units: m (ULAA)
Updated term description
Surge is a displacement along an axis that is perpendicular to the local vertical axis and is coplanar with the nominal forward motion direction of the platform. Surge is relative to the "at rest" position of the platform with respect to the axis of displacement. The "at rest" position of the platform may change over time. "Aft" indicates that positive values of surge represent the platform moving backward as viewed by an observer on top of the platform facing forward. The standard name platform_surge_fore should be used for data having the opposite sign convention. The standard name platform_surge should be chosen only if the sign convention of the data is unknown. A "platform" is a structure or vehicle that serves as a base for mounting sensors. Platforms include, but are not limited to, satellites, aeroplanes, ships, buoys, instruments, ground stations, and masts.

surface_upward_turbulent_heat_flux

under discussion
Proposer: Martin Juckes / Alison Pamment
Proposed Date: July 4, 2018
Comments: Arising from LS3MIP discussion.
Units: W m-2 (UFAA)
Term change from Term: surface_upward_sensible_heat_flux
The surface called "surface" means the lower boundary of the atmosphere. "Upward" indicates a vector component which is positive when directed upward (negative downward). The "turbulent heat flux" is the exchange of heat between the surface and the air by motion of air. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. Unless indicated in the cell_methods attribute, a quantity is assumed to apply to the whole area of each horizontal grid box. Previously, the qualifier "where_type" was used to specify that the quantity applies only to the part of the grid box of the named type. Names containing the where_type qualifier are deprecated and newly created data should use the cell_methods attribute to indicate the horizontal area to which the quantity applies.

upward_turbulent_heat_flux_in_air

under discussion
Proposer: Martin Juckes / Alison Pamment
Proposed Date: July 4, 2018
Comments: Arising from LS3MIP discussion.
Units: W m-2 (UFAA)
Term change from Term: upward_sensible_heat_flux_in_air
"Upward" indicates a vector component which is positive when directed upward (negative downward). The "turbulent heat flux" is the exchange of heat caused by the motion of air. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.

integral_wrt_time_of_surface_downward_turbulent_heat_flux

under discussion
Proposer: Martin Juckes / Alison Pamment
Proposed Date: July 4, 2018
Comments: Arising from LS3MIP discussion.
Units: W s m-2 (WSMM)
Term change from Term: integral_wrt_time_of_surface_downward_sensible_heat_flux
The phrase "integral_wrt_X_of_Y" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a vector component which is positive when directed downward (negative upward). The "turbulent heat flux" is the exchange of heat between the surface and the air by motion of air. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.

surface_downward_turbulent_heat_flux

under discussion
Proposer: Martin Juckes / Alison Pamment
Proposed Date: July 4, 2018
Comments: Arising from LS3MIP discussion.
Units: W m-2 (UFAA)
Term change from Term: surface_downward_sensible_heat_flux
The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a vector component which is positive when directed downward (negative upward). The "turbulent heat flux" is the exchange of heat between the surface and the air by motion of air. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.

biological_taxon_lsid

under discussion
Proposer: Roy Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99. Only one of biological_taxon_identifier and biological_taxon_lsid will be selected for inclusion in the standard name table.
Units:
New Term
The Life Science Identifier (LSID) is a standard URI for a biological taxon. Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy. The LSID is a URN with the syntax "urn:lsid:::[:]". For example, the copepod Calocalanus pavo may be represented by LSIDs "urn:lsid:marinespecies.org:taxname:104669" (based on WoRMS) and "urn:lsid:itis.gov:itis_tsn:85335" (based on ITIS). These URNs may be converted to URLs delivering RDF by prefixing with "http://lsid.tdwg.org/".

mass_concentration_of_biological_taxon_expressed_as_nitrogen_in_sea_water

under discussion
Proposer: Roy Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99.
Units: kg m-3 (UKMC)
New Term
Mass concentration means mass per unit volume and is used in the construction "mass_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as"nox_expressed_as_nitrogen". The phrase "expressed_as" is used in the construction "A_expressed_as_B", where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. Mass concentration of biota expressed as nitrogen is also referred to as "nitrogen biomass". Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy.

biological_taxon_name

under discussion
Proposer: Roy Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99.
Units:
New Term
A plain text human-readable label, usually a Latin binomial such as Calanus finmarchicus, applied to a biological taxon. Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy.

mass_concentration_of_biological_taxon_expressed_as_carbon_in_sea_water

under discussion
Proposer: Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99.
Units: kg m-3 (UKMC)
New Term
Mass concentration means mass per unit volume and is used in the construction "mass_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as"nox_expressed_as_nitrogen". The phrase "expressed_as" is used in the construction "A_expressed_as_B", where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. Mass concentration of biota expressed as carbon is also referred to as "carbon biomass". Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy.

mole_concentration_of_biological_taxon_expressed_as_nitrogen_in_sea_water

under discussion
Proposer: Roy Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99.
Units: mol m-3 (MLM3)
New Term
Mole concentration means number of moles per unit volume, also called "molarity", and is used in the construction "mole_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The phrase "expressed_as" is used in the construction "A_expressed_as_B", where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy.

number_concentration_of_biological_taxon_in_sea_water

under discussion
Proposer: Roy Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99.
Units: m-3 (PCUM)
New Term
"Number concentration" means the number of particles or other specified objects per unit volume. It is used in the construction "number_concentration_of_X_in_Y", where X is a material constituent of Y. Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy. Number concentration of biota is also referred to as "abundance".

mass_concentration_of_biological_taxon_expressed_as_chlorophyll_in_sea_water

under discussion
Proposer: Roy Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99.
Units: kg m-3 (UKMC)
New Term
Mass concentration means mass per unit volume and is used in the construction "mass_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The phrase "expressed_as" is used in the construction "A_expressed_as_B", where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. Chlorophylls are the green pigments found in most plants, algae and cyanobacteria; their presence is essential for photosynthesis to take place. There are several different forms of chlorophyll that occur naturally. All contain a chlorin ring (chemical formula C20H16N4) which gives the green pigment and a side chain whose structure varies. The naturally occurring forms of chlorophyll contain between 35 and 55 carbon atoms. Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy.

mole_concentration_of_biological_taxon_expressed_as_carbon_in_sea_water

under discussion
Proposer: Roy Lowry
Proposed Date: April 13, 2018
Comments: Arising from CF trac #99.
Units: mol m-3 (MLM3)
New Term
Mole concentration means number of moles per unit volume, also called "molarity", and is used in the construction "mole_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". The phrase "expressed_as" is used in the construction "A_expressed_as_B", where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. Biological taxon is a name or other label identifying an organism or a group of organisms as belonging to a unit of classification in a hierarchical taxonomy.

isotope_ratio_of_2H_to_1H_in_sea_water_excluding_solutes_and_solids

under discussion
Proposer: Martin Juckes
Proposed Date: April 3, 2018
Comments: CMIP6 - PMIP. 12.
Units: 1 (UUUU)
New Term
The phrase "ratio_of_X_to_Y" means X/Y. The phrase "isotope_ratio" is used in the construction isotope_ratio_of_A_to_B where A and B are both named isotopes. It means the ratio of the number of atoms of A to the number of atoms of B present within a medium. "H" means the element "hydrogen" and "2H" is the stable isotope "hydrogen-2", usually called "deuterium". "1H" is the stable isotope "hydrogen-1". The phrase "in_sea_water_excluding_solutes_and_solids" means that the standard name refers to the composition of the sea water medium itself and does not include material that may be dissolved or suspended in the medium.

atmosphere_mole_content_of_semiheavy_water_vapor

under discussion
Proposer: Maarten Sneep
Proposed Date: Feb. 23, 2018
Comments:
"Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including "content_of_atmosphere_layer" are used. The construction "atmosphere_mole_content_of_X" means the vertically integrated number of moles of X above a unit area. The chemical formula for semi-heavy water is HDO, water with one hydrogen replaced by deuterium.

mass_fraction_of_chloride_dry_aerosol_particles_in_air

under discussion
Proposer: Daniel Neumann
Proposed Date: May 18, 2017
Comments:
Units: 1 (UUUU)
New Term
Mass fraction is used in the construction "mass_fraction_of_X_in_Y", where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. "Dry aerosol particles" means aerosol particles without any water uptake. The chemical formula for chloride is Cl-.

mass_concentration_of_chloride_dry_aerosol_particles_in_air

under discussion
Proposer: Daniel Neumann
Proposed Date: May 18, 2017
Comments:
Units: kg m-3 (UKMC)
New Term
Mass concentration means mass per unit volume and is used in the construction "mass_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. "Dry aerosol particles" means aerosol particles without any water uptake. The chemical formula for chloride is Cl-.

mesh_grid_j_index

under discussion
Proposer: Sebastien Villaume
Proposed Date: March 31, 2017
Comments:
Units: 1 (UUUU)
New Term

mesh_grid_i_index

under discussion
Proposer: Sebastien Villaume
Proposed Date: March 31, 2017
Comments:
Units: 1 (UUUU)
New Term

water_vapor_mixing_ratio

under discussion
Proposer: Allen Jordan
Proposed Date: Feb. 27, 2017
Comments:
CF mailing list link: new standard names request
Units: 1 (UUUU)
New Term
The atmospheric water vapor mixing ratio in parts per million by volume.

ozone_mixing_ratio

under discussion
Proposer: Allen Jordan
Proposed Date: Feb. 27, 2017
Comments:
CF mailing list link: new standard names request
Units: ppmv (UUUU)
New Term
The atmospheric ozone mixing ratio in parts per billion by volume. The chemical formula for ozone is O3. The IUPAC name for ozone is trioxygen.

mass_concentration_of_chlorophyll_a_fluorescence_in_sea_water

under discussion
Proposer: Eloddie Fernandez
Proposed Date: Dec. 5, 2016
Comments:
Units: kg m-3 (UKMC)
New Term
Mass concentration means mass per unit volume and is used in the construction mass_concentration_of_X_in_Y, where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. Chloropyll fluorescence is a proxy for Chlorophyll concentration measuring re-emitted light from light absorption. Chlorophylls are the green pigments found in most plants, algae and cyanobacteria; their presence is essential for photosynthesis to take place. There are several different forms of chlorophyll that occur naturally. All contain a chlorin ring (chemical formula C20H16N4) which gives the green pigment and a side chain whose structure varies. The naturally occurring forms of chlorophyll contain between 35 and 55 carbon atoms.Chlorophyll fluorescence is mainly emitted from the Chlorophyll a pigment.

sea_water_alkalinity_per_unit_mass

under discussion
Proposer: Elodie Fernandez
Proposed Date: Dec. 5, 2016
Comments:
Units: mol kg-1 (MLKG)
New Term
sea_water_alkalinity_per_unit_mass is the total alkalinity (including carbonate, nitrogen, silicate, and borate components).

sea_ice_basal_net_downward_conductive_heat_flux

under discussion
Proposer: Dirk Notz
Proposed Date: July 19, 2016
Comments:
Units: W m-2 (UFAA)
New Term
The net heat conduction flux at the ice base.

particle_surface_area_concentration_of_dry_aerosol_in_air

under discussion
Proposer: Damien Boulanger
Proposed Date: Sept. 16, 2014
Comments:
CF mailing list link: IAGOS-CARIBIC parameters
Units: m-3 (MCUB)
New Term
Surface area per volume derived from the size resolved particle number concentration. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. "Dry aerosol particles" means aerosol particles without any water uptake.

total_air_temperature

under discussion
Proposer: Damien Boulanger
Proposed Date: Sept. 16, 2014
Comments:
CF mailing list link: IAGOS-CARIBIC parameters
Units: K (UPKA)
New Term
Total air temperature or stagnation temperature is the temperature at a stagnation point in a fluid flow. Measured by a temperature probe mounted on the surface of the aircraft. Air temperature is the bulk temperature of the air, not the surface (skin) temperature.

vertical_speed

under discussion
Proposer: Damien Boulanger
Proposed Date: Sept. 16, 2014
Comments:
CF mailing list link: IAGOS-CARIBIC parameters
Units: 1 (UUUU)
New Term
Rate of change of aircraft altitude. Speed is the magnitude of velocity.

size_resolved_number_concentration_of_cloud_liquid_water_particles_in_air

under discussion
Proposer: Damien Boulanger
Proposed Date: Sept. 16, 2014
Comments:
CF mailing list link: IAGOS-CARIBIC parameters
Units: m-3 (MCUB)
New Term
Size resolved denotes the capability of an instrument to measure aerosol properties in different size ranges. The size range of particles is typically given as a range of particle diameters in nm assuming spherical shape and must be provided in a comment attribute. "Number concentration" means the number of particles or other specified objects per unit volume. Cloud droplets are spherical and typically a few micrometers to a few tens of micrometers in diameter. An upper limit of 0.2 mm diameter is sometimes used to distinguish between cloud droplets and drizzle drops, but in active cumulus clouds strong updrafts can maintain much larger cloud droplets.

size_resolved_number_concentration_of_dry_aerosol_in_air

under discussion
Proposer: Damien Boulanger
Proposed Date: Sept. 16, 2014
Comments:
CF mailing list link: IAGOS-CARIBIC parameters
Units: m-3 (MCUB)
New Term
Size resolved denotes the capability of an instrument to measure aerosol properties in different size ranges. The size range of particles is typically given as a range of particle diameters in nm assuming spherical shape and must be provided in a comment attribute. "Number concentration" means the number of particles or other specified objects per unit volume. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol particles take up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the particles. "Dry aerosol particles" means aerosol particles without any water uptake.

inland_water_area_fraction

under discussion
Proposer: Heiko Klein
Proposed Date: May 22, 2014
Comments:
"X_area_fraction" means the fraction of horizontal area occupied by X. "X_area" means the horizontal area occupied by X within the grid cell. "inland_water" is water surrounded by land-masses like rivers and lakes, and is all water-surfaces which are not "sea".

air_pressure_at_cloud_optical_centroid_assuming_completely_cloudy_sky

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: Pa (PASX)
New Term
The cloud optical centriod pressure is a pressure level inside the cloud, near the optical thickness center of the cloud. air_pressure_at_cloud_optical_centroid_assuming_completely_cloudy_sky means a cloud optical centriod pressure assuming the scene is completely cloud covered (the grid cell or satellite footprint). A phrase assuming_condition indicates that the named quantity is the value which would obtain if all aspects of the system were unaltered except for the assumption of the circumstances specified by the condition.

cloud_albedo_assuming_completely_cloudy_sky

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: 1 (UUUU)
New Term
cloud_albedo_assuming_completely_cloudy_sky means a derived (retrieved) cloud albedo in an area assuming the scene is completely cloud covered (the grid cell or satellite footprint). A phrase assuming_condition indicates that the named quantity is the value which would obtain if all aspects of the system were unaltered except for the assumption of the circumstances specified by the condition.

effective_cloud_area_fraction_assuming_fixed_cloud_albedo

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: 1 (UUUU)
New Term
"X_area_fraction" means the fraction of horizontal area occupied by X. "X_area" means the horizontal area occupied by X within the grid cell or the satellite footprint. Cloud area fraction is also called "cloud amount" and "cloud cover". The cloud area fraction is for the whole atmosphere column, as seen from the surface or the top of the atmosphere. Cloud area fraction assuming fixed cloud albedo is the cloud area fraction by assuming the clouds in the X_area having the same fixed cloud albedo value (Y). The clouds having cloud_area_fraction_assuming_fixed_cloud_albedo and cloud albedo Y yield the same reflectance at TOA as the real clouds in the X_area. A phrase assuming_condition indicates that the named quantity is the value which would obtain if all aspects of the system were unaltered except for the assumption of the circumstances specified by the condition. The assumed albedo shall be attached to the variable either by an attribute 'assumed_cloud_albedo' (if the value is independent of geolocation) or through the ancillary_variables to a variable with standard_name 'cloud_albedo'.

air_pressure_at_cloud_optical_centroid

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: Pa (PASX)
New Term
The cloud optical centriod pressure is a pressure level inside the cloud, near the optical thickness center of the cloud.

ultraviolet_aerosol_index

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: 1 (UUUU)
New Term
ultraviolet means ultraviolet radiation, with wavelengths shorter than 400 nm. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. The UV-Aerosol Index is a UV color index that represents the deviation of the outgoing TOA radiation in the UV from that of a standard atmosphere, featuring Rayleigh scattering and gas absorption, in particular by ozone. No cloud droplets or suspended liquid or solid particles (aerosols) are present in the standard atmosphere. It is bounded below by a Lambertian surface, featuring isotropic reflection, assumed independent of wavelength. The ultraviolet aerosol index is computed from the Earth reflectances at two UV wavelengths. A positive deviation from the standard atmosphere is often, but not exclusively, attributed to the absorption of radiation by aerosols, while negative values represent increased scattering, not necessarily by aerosols. The wavelengths used for the computation of the ultraviolet aerosol index should be indicated using a coordinate variable with standard name radiation _wavelength and length 2. This support coordinate variable should be given in the ancillary_variables attribute. (Note: not the coordinates attribute, as this is an annotation, not a coordinate).

air_temperature_at_cloud_optical_centroid

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: K (UPKA)
New Term
Air temperature is the bulk temperature of the air, not the surface (skin) temperature. The cloud optical centriod pressure is a pressure level inside the cloud, near the optical thickness center of the cloud. There is also a standard name for air_pressure_at_cloud_optical_centroid.

height_of_cloud_optical_centroid

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: m (ULAA)
New Term
Height is the vertical distance above the surface. The cloud height at optical centroid is a height within the cloud, near the optical thickness center of the cloud. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-"optical_thickness") on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. There is also a standard name for air_pressure_at_cloud_optical_centroid.

surface_upwelling_shortwave_flux_in_air_due_to_fluorescence

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: mol s-2 m-2 m-1 sr-1
New Term
The surface called "surface" means the lower boundary of the atmosphere. "shortwave" means shortwave radiation. Upwelling radiation is radiation from below. It does not mean "net upward". When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The fluorescence is caused by chlorophyll.

air_pressure_at_center_of_aerosol_layer

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: Pa (PASX)
New Term
The center corresponds to the mean air pressure of the top and bottom of the layer containing aerosol particles. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself.

height_at_center_of_aerosol_layer

under discussion
Proposer: Maarten Sneep
Proposed Date: March 10, 2016
Comments:
CF mailing list link: standard name requests
Units: m (ULAA)
New Term
Height is the vertical distance above the surface. The center corresponds to the height corresponding to the mean air pressure of the top and bottom of the layer containing aerosol particles. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself.

number_of_days_with_lwe_thickness_of_precipitation_amount_at_or_above_threshold

under discussion
Proposer: Dan Hollis
Proposed Date: Sept. 18, 2014
Comments:
CF mailing list link: Days of rain
Units: 1 (UUUU)
New Term
"Amount" means mass per unit area. The construction lwe_thickness_of_X_amount or _content means the vertical extent of a layer of liquid water having the same mass per unit area. "lwe" means liquid water equivalent. A variable whose standard name has the form number_of_days_with_X_at_or_below|above_threshold is a count of the number of days on which the condition X_at_or_below|above_threshold is satisfied. It must have a coordinate variable or scalar coordinate variable with the standard name of X to supply the threshold(s). It must have a climatological time variable, and a cell_methods entry for within days which describes the processing of quantity X before the threshold is applied. A number_of_days is an extensive quantity in time, and the cell_methods entry for over days should be "sum".

thickness_of_sediment_layers

under discussion
Proposer: Bert Jagers
Proposed Date: Nov. 1, 2015
Comments:
This would typically be a NTIME x NCELLS x NLAYERS array (where NCELLS could be 1-dimensional for an unstructured grid or 2-dimensional, i.e. IMAX x JMAX, for a structured grid model) representing the the thickness of the NLAYERS sediment layers. By the way please note that the administration of layers is in general carried independently per computational cell, so layer k of cell j1 does not need to be connected to layer k of neighboring cell j2.

mass_content_of_sediment_fraction_in_sediment_layer

under discussion
Proposer: Bert Jagers
Proposed Date: Nov. 1, 2015
Comments:
Units: kg m-2 (KMP2)
New Term
Typically a NTIME x NCELLS x NLAYERS x NFRAC array containing the mass per unit area per sediment fraction per layer per time step stored.

volume_fraction_of_sediment_fraction_in_sediment_layer

under discussion
Proposer: Bert Jagers
Proposed Date: Nov. 1, 2015
Comments:
Volume fraction" is used in the construction volume_fraction_of_X_in_Y, where X is a material constituent of Y. Typically a NTIME x NCELLS x NLAYERS x NFRAC array containing the volume fraction per sediment fraction per layer per time step stored (unit 1). The dimension representing the number of sediment fractions NFRAC may include multiple model dependent gravel, sand, silt, clay fractions, so we need to generalize beyond the scope of the currently existing standard names of volume_fraction_of_clay/sand/silt_in_soil.

eastward_derivative_of_eastward_sea_water_velocity

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: s-1 (PRSC)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water velocity is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. eastward_derivative_of_eastward_sea_water_velocity means (d/dy) of the seawater velocity component v, as derived by ocean data models, keeping all other coordinates (x,z,t) constant.

depth_derivative_of_eastward_sea_water_velocity

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: s-1 (PRSC)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water velocity is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. depth_derivative_of_northward_sea_water_velocity means (d/dz) of the seawater velocity component v, as derived by ocean data models, keeping all other coordinates (x,y,t) constant.

northward_sea_water_acceleration

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: m s-2 (MPS2)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water acceleration is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. northward_sea_water_acceleration means acceleration in northward direction, thus (d/dt) of the seawater velocity component u, as derived by ocean data models, keeping all other coordinates (x,y,z) constant.

northward_derivative_of_northward_sea_water_velocity

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: s-1 (PRSC)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water velocity is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. northward_derivative_of_northward_sea_water_velocity means (d/dx) of the seawater velocity component u, as derived by ocean data models, keeping all other coordinates (y,z,t) constant.

eastward_sea_water_acceleration

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: m s-2 (MPS2)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water acceleration is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. eastward_sea_water_acceleration means acceleration in eastward direction, thus (d/dt) of the seawater velocity component v, as derived by ocean data models, keeping all other coordinates (x,y,z) constant.

depth_derivative_of_northward_sea_water_velocity

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: s-1 (PRSC)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water velocity is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. depth_derivative_of_northward_sea_water_velocity means (d/dz) of the seawater velocity component u, as derived by ocean data models, keeping all other coordinates (x,y,t) constant.

northward_derivative_of_eastward_sea_water_velocity

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: s-1 (PRSC)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water velocity is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. northward_derivative_of_eastward_sea_water_velocity means (d/dx) of the seawater velocity component v, as derived by ocean data models, keeping all other coordinates (y,z,t) constant.

eastward_derivative_of_northward_sea_water_velocity

new
Proposer: Alexander Hartel/Mike Eichhorn
Proposed Date: Jan. 21, 2016
Comments:
Units: s-1 (PRSC)
New Term
"Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Northward" indicates a vector component which is positive when directed northward (negative southward). Sea water velocity is defined as a two-dimensional vector, with no vertical component. "component_derivative_of_X" means derivative of X with respect to distance in the component direction, which may be northward, southward, eastward, westward, x or y. The last two indicate derivatives along the axes of the grid, in the case where they are not true longitude and latitude. eastward_derivative_of_northward_sea_water_velocity means (d/dy) of the seawater velocity component u, as derived by ocean data models, keeping all other coordinates (x,z,t) constant.

divergence_of_surface_downward_stress

under discussion
Proposer: Bruce Hackett
Proposed Date: Jan. 19, 2016
Comments:
Units: 1 (UUUU)
New Term
The divergence is a signed scalar that represents the magnitude of the 2D surface wind downward stress vector field's source (positive) or sink (negative) at a given point. "[horizontal_]divergence_of_X" means [horizontal] divergence of a vector X; if X does not have a vertical component then "horizontal" should be omitted. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a downward flux of momentum, which accelerates the lower medium along the vector and the upper medium against the vector. The surface downward stress is the wind stress on the surface.

curl_of_surface_downward_stress

under discussion
Proposer: Bruce Hackett
Proposed Date: Jan. 19, 2016
Comments:
Units: 1 (UUUU)
New Term
The curl is a signed scalar that represents the magnitude of the 2D surface wind downward stress vector field's local anti-clock-wise rotation at a given point; clockwise rotation is thus given as negative curl. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a downward flux of momentum, which accelerates the lower medium along the vector and the upper medium against the vector. The surface downward stress is the wind stress on the surface.

volume_scattering_coefficient_at_stp_in_air_due_to_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: Nov. 26, 2014
Comments: 22
Units: m-1 (vocab.ndg.nerc.ac.uk/term/P061/current/UPRM)
New Term
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1, i.e. multiplied by density, have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) has not necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "stp" means standard temperature (0 degC) and pressure (101325 Pa).

volume_scattering_coefficient_at_stp_in_air_due_to_ambient_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: Nov. 26, 2014
Comments: 21
Units: m-1 (vocab.ndg.nerc.ac.uk/term/P061/current/UPRM)
New Term
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1, i.e. multiplied by density, have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Ambient_aerosol" means that the aerosol is measured or modelled at the ambient state of pressure, temperature and relative humidity that exists in its immediate environment. "Ambient aerosol particles" are aerosol particles that have taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the particles. To specify the relative humidity at which the quantity described by the standard name applies, provide a scalar coordinate variable with the standard name of relative_humidity. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "stp" means standard temperature (0 degC) and pressure (101325 Pa).

volume_backwards_scattering_coefficient_at_stp_in_air_due_to_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: Nov. 26, 2014
Comments: 24
Units: m-1 (vocab.ndg.nerc.ac.uk/term/P061/current/UPRM)
New Term
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1, i.e. multiplied by density, have standard names with "specific_" instead of "volume_". Backwards scattering refers to the sum of scattering into all backward angles i.e. scattering_angle exceeds pi/2 radians. A scattering_angle should not be specified with this quantity. The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) has not necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "stp" means standard temperature (0 degC) and pressure (101325 Pa).

volume_absorption_coefficient_at_stp_in_air_due_to_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: Nov. 26, 2014
Comments: 23
Units: m-1 (vocab.ndg.nerc.ac.uk/term/P061/current/UPRM)
New Term
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1, i.e. multiplied by density, have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) has not necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "stp" means standard temperature (0 degC) and pressure (101325 Pa).

optical_particle_diameter

under discussion
Proposer: Markus Fiebig
Proposed Date: Nov. 26, 2014
Comments: 16a
Units: m (http://vocab.ndg.nerc.ac.uk/term/P061/current/ULAA)
New Term
The diameter of spherical particles whose presence in a medium would result in the same refractive index and lead to the same intensity of scattered light as the particles in question.

toa_outgoing_photon_radiance_per_unit_wavelength

under discussion
Proposer: Maarten Sneep
Proposed Date: Nov. 12, 2014
Comments:
Units: mol m-2 m-1 s-1 sr-1
New Term
"toa" means top of atmosphere. "Photon radiance" is the photon flux in a particular direction, per unit of solid angle. The direction is specified as "outgoing", i.e. radiation from below. A photon flux is specified in terms of numbers of photons expressed in moles. The "per unit wavelength" indicates a spectrally resolved quantity. A coordinate variable for radiation wavelength should be given the standard name radiation_wavelength.

toa_incoming_photon_solar_irradiance_per_unit_wavelength

under discussion
Proposer: Maarten Sneep
Proposed Date: Nov. 12, 2014
Comments:
Units: mol m-2 m-1 s-1
New Term
"toa" means top of atmosphere. "Photon solar irradiance" is the photon flux on a surface perpendicular to the incoming solar radiation. The direction is specified as "incoming". A photon flux is specified in terms of numbers of photons expressed in moles. The "per unit wavelength" indicates a spectrally resolved quantity. A coordinate variable for radiation wavelength should be given the standard name radiation_wavelength.

atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol_particles

under discussion
Proposer: Alison Pamment
Proposed Date: Nov. 11, 2014
Comments:
Units: 1 (vocab.ndg.nerc.ac.uk/term/P061/current/UUUU)
Term change from Term: atmosphere_optical_thickness_due_to_black_carbon_ambient_aerosol
The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. The atmosphere optical thickness applies to radiation passing through the entire atmosphere. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Ambient_aerosol" means that the aerosol is measured or modelled at the ambient state of pressure, temperature and relative humidity that exists in its immediate environment. "Ambient aerosol particles" are aerosol particles that have taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the particles. To specify the relative humidity and temperature at which the quantity described by the standard name applies, provide scalar coordinate variables with standard names of "relative_humidity" and "air_temperature". Black carbon aerosol is composed of elemental carbon. It is strongly light absorbing. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

atmosphere_absorption_optical_thickness_due_to_black_carbon_ambient_aerosol_particles

under discussion
Proposer: Alison Pamment
Proposed Date: Nov. 11, 2014
Comments:
Units: 1 (UUUU)
Term change from Term: atmosphere_absorption_optical_thickness_due_to_black_carbon_ambient_aerosol
The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. "Absorption optical thickness" means that part of the atmosphere optical thickness that is caused by the absorption of incident radiation. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Ambient_aerosol" means that the aerosol is measured or modelled at the ambient state of pressure, temperature and relative humidity that exists in its immediate environment. "Ambient aerosol particles" are aerosol particles that have taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the particles. To specify the relative humidity and temperature at which the quantity described by the standard name applies, provide scalar coordinate variables with standard names of "relative_humidity" and "air_temperature". The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

data_cutoff_time

under discussion
Proposer: Mark Hedley
Proposed Date: Oct. 30, 2014
Comments:
CF mailing list link: GRIB2 data cutoff
Units: s (http://vocab.ndg.nerc.ac.uk/term/P061/current/UTBB)
New Term
A datetime which defines the instant after which observational data for a forecast run is no longer included in that forecast, which may be different from the forecast_reference_time.

number_of_realizations

under discussion
Proposer: Mark Hedley
Proposed Date: Oct. 3, 2014
Comments:
CF mailing list link: realization | x of n
Units: 1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UUUU)
New Term
In a model or operational forecast, the number of member realizations within a given ensemble. This provides context for any specific realization, for example orienting a member relative to its original group (even if the group is no longer intact).

surface_normalized_radar_backscatter_coefficient

under discussion
Proposer: Olivier Lauret & John Niedfeldt
Proposed Date: May 30, 2014
Comments:
Units: 1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UUUU)
New Term
The quantity called surface_normalized_radar_backscatter_coefficient is also commonly called the "normalized radar cross section" or "sigma naught" in the microwave remote sensing community. It is the fraction of incident power that is reflected by the surface. The surface called "surface" means the lower boundary of the atmosphere. The surface_normalized_radar_backscatter_coefficient is measured at a single wavelength and at a single angle of incidence, which should be specified using scalar coordinate variables with standard names, respectively, of radiation_wavelength and angle_of_incidence. Scattering of radiation is its deflection from its incident path. Backwards scattering refers to the sum of scattering into all backward angles i.e. scattering_angle exceeding pi/2 radians. A scattering_angle should not be specified with this quantity. The surface_normalized_radar_backscatter_coefficient differs from the quantity surface_backwards_scattering_coefficient_of_radar_wave in that the latter does not require a radiation_wavelength and angle_of_ incidence to be specified.

volume_scattering_coefficient_at_stp_in_air_due_to_pm2p5_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: Oct. 12, 2013
Comments: 7
Units: m-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UPRM)
New Term
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1, i.e. multiplied by density, have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) has not necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm2p5" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 2.5 micrometers, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa). "surface" means that the property applies at the lower boundary of the atmosphere.

log10_size_interval_based_number_size_distribution_of_dried_aerosol_particles_at_stp_in_air

under discussion
Proposer: Markus Fiebig
Proposed Date: Oct. 12, 2013
Comments: 16
Units: m-3 (PCUM)
New Term
The particle number size distribution is the number concentration of aerosol particles, normalised to the decadal logarithmic size interval the concentration applies to, as a function of particle diameter. Depending on the measurement method, one coordinate variable such as "electrical_mobility_particle_diameter", "optical_particle diameter", or "aerodynamic_particle_diameter" should be specified to indicate that the property applies at specific particle sizes and how the size was obtained. "log10_X" means common logarithm (i.e. base 10) of X. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) has not necessarily been reached. To specify the relative humidity at which the property applies, provide a scalar coordinate variable with the standard name of "relative_humidity". "stp" means standard temperature (0 degC) and pressure (101325 Pa).

volume_absorption_coefficient_at_stp_in_air_due_to_pm2p5_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: Oct. 12, 2013
Comments: 10
Units: m-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UPRM)
New Term
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) hasn't necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm2p5" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 2.5 micrometers, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

volume_backwards_scattering_coefficient_at_stp_in_air_due_to_pm2p5_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: Oct. 12, 2013
Comments: 13
Units: m-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UPRM)
New Term
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". Backwards scattering refers to the sum of scattering into all backward angles i.e. scattering_angle exceeds pi/2 radians. A scattering_angle should not be specified with this quantity. The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) hasn't necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm2p5" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 2.5 micrometers, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

number_concentration_of_enterococcus_in_sea_water

under discussion
Proposer: John Maurer
Proposed Date: March 21, 2013
Comments:
Units: m-3 (http://vocab.ndg.nerc.ac.uk/term/P061/current/PCUM)
New Term
"Number concentration" means the number of particles or other specified objects per unit volume. In this context, it represents the number of colony-forming units (CFU) of bacteria belonging to the genus Enterococcus. This indicator bacteria has been correlated with the presence of human pathogens (disease-causing organisms) and therefore with human illnesses such as gastroenteritis, diarrhea, and various infections in epidemiological studies. As such, it is commonly measured in beach water quality monitoring programs.

number_concentration_of_clostridium_perfringens_in_sea_water

under discussion
Proposer: John Maurer
Proposed Date: March 21, 2013
Comments:
Units: m-3 (http://vocab.ndg.nerc.ac.uk/term/P061/current/PCUM)
New Term
"Number concentration" means the number of particles or other specified objects per unit volume. In this context, it represents the number of colony-forming units (CFU) of bacteria belonging to the species Clostridium perfringens. Because this bacteria is a normal component of the human intestinal tract, its presence in samples of sea water can be used as a tracer of sewage contamination. As such, it is commonly measured in beach water quality monitoring programs.

mass_fraction_of_particulate_organic_carbon_in_sea_water

under discussion
Proposer: John Graybeal
Proposed Date: Sept. 12, 2013
Comments:
Units: 1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UUUU)
New Term
Proportion of carbon particles from organic sources in sea water. Mass fraction is used in the construction mass_fraction_of_X_in_Y, where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical species denoted by X may be described by a single term such as 'nitrogen' or a phrase such as 'nox_expressed_as_nitrogen'. Organic carbon describes a family of chemical species and is the term used in standard names for all species belonging to the family that are represented within a given model. The list of individual species that are included in a quantity having a group chemical standard name can vary between models. Where possible, the data variable should be accompanied by a complete description of the species represented, for example, by using a comment attribute. Particulate organic carbon is in the form of particles too big to pass through a filter.

mole_concentration_of_particulate_matter_expressed_as_lithogenic_silicon_per_unit_mass_in_sea_water

under discussion
Proposer: John Graybeal
Proposed Date: Sept. 12, 2013
Comments:
Units: mol kg-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/MLKG)
New Term
Concentration in sea water of silicon dioxide particles produced from terrestrial rocks and soil, presented as moles per unit mass. The concept moles_of_X_per_unit_mass_in_Y is also called "molality" of X in Y, where X is a material constituent of Y.

moles_of_nitrogen_per_unit_mass_in_sea_water

under discussion
Proposer: John Graybeal
Proposed Date: Sept. 12, 2013
Comments:
Units: mol kg-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/MLKG)
New Term
Concentration of nitrogen in sea water, presented as number of moles per unit mass. The concept moles_of_X_per_unit_mass_in_Y is also called "molality" of X in Y, where X is a material constituent of Y.

mole_concentration_of_dissolved_phosphorus_per_unit_mass_in_sea_water

under discussion
Proposer: John Graybeal
Proposed Date: Sept. 12, 2013
Comments:
Units: mol kg-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/MLKG)
New Term
Concentration of dissolved phosphorus in sea water, presented as number of moles per unit mass. The concept moles_of_X_per_unit_mass_in_Y is also called "molality" of X in Y, where X is a material constituent of Y.

mole_concentration_of_particulate_matter_expressed_as_biogenic_silicon_per_unit_mass_in_sea_water

under discussion
Proposer: John Graybeal
Proposed Date: Sept. 12, 2013
Comments:
Units: mol kg-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/MLKG)
New Term
Concentration in sea water of silicon dioxide particles produced by living organisms, presented as moles per unit mass. Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y.

sinking_mass_flux_of_particulate_calcium_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_matter_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated. "Particulate matter" includes particles composed of both organic and inorganic chemical species.

sinking_mass_flux_of_particulate_inorganic_matter_expressed_as_carbon_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated. The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A.

sinking_mass_flux_of_particulate_inorganic_matter_expressed_as_nitrogen_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated. The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A.

sinking_mass_flux_of_particulate_organic_matter_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated.

sinking_mass_flux_of_particulate_matter_expressed_as_carbon_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated. The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. "Particulate matter" includes particles composed of both organic and inorganic chemical species.

sinking_mass_flux_of_particulate_organic_matter_expressed_as_carbon_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated. The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A.

sinking_mass_flux_of_particulate_organic_matter_expressed_as_nitrogen_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated. The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A.

sinking_mass_flux_of_particulate_ilithogenic_silica_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid.

sinking_mass_flux_of_particulate_biogenic_silica_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_silica_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_iron_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_matter_expressed_as_nitrogen_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments: OK
Units: kg m-2 s-1 (KSP2)
New Term
In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Sinking mass flux is understood as dry mass, i.e. weighed after water has evaporated. The phrase "expressed_as" is used in the construction A_expressed_as_B, where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A, neglecting all other chemical constituents of A. "Particulate matter" includes particles composed of both organic and inorganic chemical species.

sinking_mass_flux_of_particulate_aluminum_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_phosphorous_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_magnesium_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_barium_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_manganese_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

sinking_mass_flux_of_particulate_titanium_in_sea_water

under discussion
Proposer: Matthias Lankhorst
Proposed Date: Oct. 9, 2013
Comments:
Units: kg m-2 s-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/KSP2)
New Term

surface_snow_extent

under discussion
Proposer: Thomas Lavergne
Proposed Date: Aug. 13, 2013
Comments:
Units: m2 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UMSQ)
New Term

barometric_altitude_above_ground

under discussion
Proposer: Martin Schultz
Proposed Date: July 5, 2013
Comments:
Units: m (ULAA)
New Term
Barometric altitude is the altitude determined by a pressure measurement which is converted to altitude through interpolation of the International Standard Atmosphere (ICAO, 1976). The reference pressure is derived from the surface pressure measurement at take-off of the aircraft.

toa_lambertian_equivalent_albedo

under discussion
Proposer: Ted Kennelly
Proposed Date: May 7, 2013
Comments: GOES-R
CF mailing list link: New reflectance standard names
Units: 1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UUUU)
New Term
Albedo is the ratio of the outgoing to the incoming power per unit area (irradiance). A coordinate variable of, respectively, radiation_wavelength or radiation_frequency can be used to specify the radiation wavelength or frequency. "toa" means top of atmosphere. "lambertian_equivalent" means the quantity is evaluated for a diffusely reflecting surface.

toa_lambertian_equivalent_albedo_multiplied_by_cosine_solar_zenith_angle

under discussion
Proposer: Ted Kennelly
Proposed Date: May 7, 2013
Comments: GOES-R
CF mailing list link: New reflectance standard names
Units: 1 (UUUU)
New Term
Albedo is the ratio of the outgoing to the incoming power per unit area (irradiance). A coordinate variable of, respectively, radiation_wavelength or radiation_frequency can be used to specify the radiation wavelength or frequency. "toa" means top of atmosphere. "lambertian_equivalent" means the quantity is evaluated for a diffusely reflecting surface. "multiplied_by_cosine_solar_zenith_angle" means that the quantity has normalized to remove the angular dependence of the incoming shortwave irradiance.

toa_shortwave_irradiance_per_unit_wavelength

under discussion
Proposer: Randy Horne
Proposed Date: May 2, 2013
Comments: GOES-R OK
Units: W m-2 m-1
New Term
"toa" means top of atmosphere. "Shortwave" means shortwave radiation. Irradiance is the radiant power per unit area incident at a surface.

aerosol_binary_mask

under discussion
Proposer: Charles Paxson
Proposed Date: May 15, 2013
Comments: GOES-R
Units: 1 (UUUU)
New Term
X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = aerosols present, 0 = aerosols absent. Note that if no threshold is supplied, the binary mask is 1 if there is any non-zero amount of aerosol.

smoke_binary_mask

under discussion
Proposer: Charles Paxson
Proposed Date: May 15, 2013
Comments: GOES-R
Units: 1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UUUU)
New Term
X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = smoke present, 0 = smoke absent. Note that if no threshold is supplied, the binary mask is 1 if there is any non-zero amount of smoke.

dust_binary_mask

under discussion
Proposer: Charles Paxson
Proposed Date: May 15, 2013
Comments: GOES-R
Units: 1 (UUUU)
New Term
X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = dust present, 0 = dust absent. Note that if no threshold is supplied, the binary mask is 1 if there is any non-zero amount of dust.

toa_outgoing_inband_radiance

under discussion
Proposer: Randy Horne
Proposed Date: April 3, 2013
Comments:
Units: W m-2 sr-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/WMSS)
New Term
"toa" means top of atmosphere. "outgoing" means emitted toward outer space. "inband" means the radiance quantity is for a discrete bandpass. This quantity is the radiant power per unit area in a given direction per unit solid angle integrated over a discrete bandpass. Note: A coordinate variable to capture the center wavelength, and potentially, a boundary variable to capture the bandpass extents may be used.

toa_outgoing_inband_spectral_radiance

under discussion
Proposer: Randy Horne
Proposed Date: April 3, 2013
Comments:
Units: mW m-2 sr-1 (cm-1)-1
New Term
"toa" means top of atmosphere. "outgoing" means emitted toward outer space. "inband" means the radiance quantity is for a discrete bandpass. "spectral" means per unit wavenumber or as a function of wavenumber. This quantity is the radiant power per unit area in a given direction per unit solid angle per unit wavelength integrated over a discrete bandpass and normalized by the bandpass response function. Note: A coordinate variable to capture the center wavelength, and potentially, a boundary variable to capture the bandpass extents may be used.

toa_outgoing_radiance

under discussion
Proposer: Randy Horne
Proposed Date: April 3, 2013
Comments:
Units: W m-2 sr-1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/WMSS)
New Term
"toa" means top of atmosphere. "outgoing" means emitted towards outer space. This quantity is the radiant power per unit area in a given direction per unit solid angle integrated over all wavelengths.

datetime_iso8601

under discussion
Proposer: Aleksandar Jelenak
Proposed Date: Nov. 20, 2012
Comments:
String representing date-time information according to the ISO 8601:2004(E) standard. Variables with this standard name cannot serve as coordinate variables. Date-time information is in the Gregorian calendar. For dates preceding the Gregorian calendar the date-time information is in the proleptic Gregorian calendar. Possible date-time string forms are: <datetime> = <date> "T" <time> <timezone> ; <date> = YYYY "-" MM "-" DD | YYYY "-" DDD ; <time> = hh | hh ":" mm | hh ":" mm ":" ss | hh ":" mm ":" ss "." S | hh ":" mm ":" ss "," S ; <timezone> = "" | "Z" | "+" hh | "+" hh ":" mm | "-" hh | "-" hh ":" mm Where: * "YYYY" is a four-digit year (0000-9999). * "MM" is a two-digit month of the year (01-12). * "DD" is a two-digit day of the month (01-31). * "DDD" is a three-digit ordinal day of the year (001-366). * "hh" is a two-digit hour (00-23). * "mm" is a two-digit minute (00-59) * "ss" is a two-digit second (00-59). * "S" is one or more digits representing a decimal fraction of the second. * The value of any designator when not specified is zero. * If <timezone> is omitted the default value is "Z".

linear_term_of_radiance_per_unit_wavenumber_correction_due_to_intercalibration

under discussion
Proposer: Aleksandar Jelenak
Proposed Date: Nov. 20, 2012
Comments: See also http://wiki.esipfed.org/index.php/Standard_Names_For_Satellite_Observations#Proposal_.232
Units: 1 (http://vocab.ndg.nerc.ac.uk/term/P061/current/UUUU)
New Term
linear_term_of_radiance_per_unit_wavenumber_correction_due_to_intercalibration is the linear term (slope) of the formula for correcting measured spectral radiance expressed as a function of wavenumber. The correction is derived from intercalibration between the monitored and the reference sensor. The resulting corrected spectral radiance of the monitored sensor becomes comparable to measured spectral radiance of the reference sensor. Radiance is the radiative flux in a particular direction, per unit of solid angle. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

quadratic_term_of_radiance_per_unit_wavenumber_correction_due_to_intercalibration

under discussion
Proposer: Aleksandar Jelenak
Proposed Date: Nov. 20, 2012
Comments: See also http://wiki.esipfed.org/index.php/Standard_Names_For_Satellite_Observations#Proposal_.232
quadratic_term_of_radiance_per_unit_wavenumber_correction_due_to_intercalibration is the quadratic term of the formula for correcting measured spectral radiance expressed as a function of wavenumber. The correction is derived from intercalibration between the monitored and the reference sensor. The resulting corrected spectral radiance of the monitored sensor becomes comparable to measured spectral radiance of the reference sensor. Radiance is the radiative flux in a particular direction, per unit of solid angle. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

constant_term_of_radiance_per_unit_wavenumber_correction_due_to_intercalibration

under discussion
Proposer: Aleksandar Jelenak
Proposed Date: Nov. 20, 2012
Comments: See also http://wiki.esipfed.org/index.php/Standard_Names_For_Satellite_Observations#Proposal_.232
Units: W m-2 sr-1 (m-1)-1
New Term
constant_term_of_radiance_per_unit_wavenumber_correction_due_to_intercalibration is the constant term (offset) of the formula for correcting measured spectral radiance expressed as a function of wavenumber. The correction is derived from intercalibration between the monitored and the reference sensor. The resulting corrected spectral radiance of the monitored sensor becomes comparable with measured spectral radiance of the reference sensor. Radiance is the radiative flux in a particular direction, per unit of solid angle. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

volume_backwards_scattering_coefficient_at_stp_in_air_due_to_pm1_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: March 7, 2012
Comments: 12
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". Backwards scattering refers to the sum of scattering into all backward angles i.e. scattering_angle exceeds pi/2 radians. A scattering_angle should not be specified with this quantity. The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) hasn't necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm1" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 1 micrometer, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

volume_backwards_scattering_coefficient_at_stp_in_air_due_to_pm10_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: March 7, 2012
Comments: 14
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1, i.e. multiplied by density, have standard names with "specific_" instead of "volume_". Backwards scattering refers to the sum of scattering into all backward angles i.e. scattering_angle exceeds pi/2 radians. A scattering_angle should not be specified with this quantity. The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) hasn't necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm10" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 10 micrometers, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

volume_scattering_coefficient_at_stp_in_air_due_to_pm1_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: March 7, 2012
Comments: 6 (Can we drop "surface"?)
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) has not necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm1" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 1 micrometer, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide a scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

volume_absorption_coefficient_at_stp_in_air_due_to_pm1_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: March 7, 2012
Comments: 9
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) hasn't necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm1" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 1 micrometer, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

volume_absorption_coefficient_at_stp_in_air_due_to_pm10_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: March 7, 2012
Comments: 11
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) hasn't necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm10" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 10 micrometers, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

volume_scattering_coefficient_at_stp_in_air_due_to_pm10_dried_aerosol_particles

under discussion
Proposer: Markus Fiebig
Proposed Date: March 7, 2012
Comments: 8
The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1, i.e. multiplied by density, have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths unless a coordinate of "radiation_wavelength" or "radiation_frequency" is included to specify the wavelength. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. "Dried_aerosol" means that the aerosol sample has been dried from the ambient state, but that the dry state (relative humidity less than 40 per cent) hasn't necessarily been reached. To specify the relative humidity at which the sample was measured, provide a scalar coordinate variable with the standard name of "relative_humidity". "pm10" refers to the fraction of aerosol particles with an aerodynamic diameter of less than or equal to 10 micrometers, where the size cut is applied under ambient conditions before aerosol humidity, pressure, or temperature are possibly altered. To specify the relative humidity at which the sample was sized, provide scalar coordinate variable with the standard name of "relative_humidity_for_aerosol_particle_size_selection". The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "at_stp" refers to a volume at standard conditions of temperature (273.15 K) and pressure (1013.25 hPa).

volume_backwards_scattering_coefficient_of_radiative_flux_in_sea_water_due_to_particles

under discussion
Proposer: Olivier Lauret
Proposed Date: Dec. 2, 2010
Comments:
Units: m-1 (http://vocab.ndg.nerc.ac.uk/term/P061/37/UPRM)
New Term
Radiative flux is the sum of shortwave and longwave radiative fluxes. The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths, unless a coordinate of "radiation_wavelength" is included to specify the wavelength. Scattering of radiation is its deflection from its incident path without loss of energy. Backwards scattering refers to the sum of scattering into all backward angles i.e. scattering_angle exceeds pi/2 radians. A scattering_angle should not be specified with this quantity. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.

mass_concentration_of_inorganic_particles_in_sea_water

under discussion
Proposer: Olivier Lauret
Proposed Date: Dec. 2, 2010
Comments:
Units: kg m-3 (http://vocab.ndg.nerc.ac.uk/term/P061/37/UKMC)
New Term
Mass concentration means mass per unit volume and is used in the construction "mass_concentration_of_X_in_Y", where X is a material constituent of Y. A chemical species denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen".

volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_phytoplankton

under discussion
Proposer: Olivier Lauret
Proposed Date: Dec. 2, 2010
Comments:
Units: m-1 (http://vocab.ndg.nerc.ac.uk/term/P061/37/UPRM)
New Term
Radiative flux is the sum of shortwave and longwave radiative fluxes. The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths, unless a coordinate of "radiation_wavelength" is included to specify the wavelength. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Phytoplankton are autotrophic prokaryotic or eukaryotic algae that live near the water surface where there is sufficient light to support photosynthesis.

volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter_and_non_algal_particles

under discussion
Proposer: Olivier Lauret
Proposed Date: Dec. 2, 2010
Comments:
Units: m-1 (http://vocab.ndg.nerc.ac.uk/term/P061/37/UPRM)
New Term
Radiative flux is the sum of shortwave and longwave radiative fluxes. The volume scattering/absorption/attenuation coefficient is the fractional change of radiative flux per unit path length due to the stated process. Coefficients with canonical units of m2 s-1 i.e. multiplied by density have standard names with "specific_" instead of "volume_". The scattering/absorption/attenuation coefficient is assumed to be an integral over all wavelengths, unless a coordinate of "radiation_wavelength" is included to specify the wavelength. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase.