Proposals for CF

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33 proposals match your search

precipitation_type

under discussion
Proposer: Emily Schlie and Eric Engle and Steve Olson
Proposed Date: June 12, 2020
Comments:
Units: 1 (UUUU)
New Term
Classification of the predominate precipitating hydrometeor at a location or grid cell. These strings have not yet been standardized. Alternatively, the data variable may contain integers which can be translated to strings using flag_values and flag_meanings attributes.

apparent_air_temperature

under discussion
Proposer: Emily Schlie and Eric Engle and Steve Olson
Proposed Date: June 12, 2020
Comments:
Units: K (UPKA)
New Term
The perceived temperature derived from either a combination of temperature and wind (Wind Chill), or temperature and humidity (Heat Index) for the top of the indicated hour. Source: https://www.nws.noaa.gov/directives/sym/pd01002001curr.pdf

northward_horizontal_wind_shear

under discussion
Proposer: Emily Schlie and Eric Engle and Steve Olson
Proposed Date: June 12, 2020
Comments:
Units: s-1 (PRSC)
New Term
The change in the northward wind component with respect to the change in lateral (horizontal) position for a given atmospheric level.

atmosphere_layer_thickness_expressed_as_geopotential_height_difference

under discussion
Proposer: Emily Schlie and Eric Engle and Steve Olson
Proposed Date: June 12, 2020
Comments:
Units: m (ULAA)
New Term
The difference of geopotential height between two isobaric levels.

eastward_vertical_wind_shear

under discussion
Proposer: Emily Schlie and Eric Engle and Steve Olson
Proposed Date: June 12, 2020
Comments:
Units: s-1 (PRSC)
New Term
The derivative of the eastward wind component with respect to the height.

eastward_horizontal_wind_shear

under discussion
Proposer: Emily Schlie and Eric Engle and Steve Olson
Proposed Date: June 12, 2020
Comments:
Units: s-1 (PRSC)
New Term
The change in the eastward wind component with respect to the change in the lateral (horizontal) position for a given atmospheric level.

northward_vertical_wind_shear

under discussion
Proposer: Emily Schlie and Eric Engle and Steve Olson
Proposed Date: June 12, 2020
Comments:
Units: s-1 (PRSC)
New Term
The derivative of the northward wind component with respect to the height.

echo_intensity_in_sea_water

under discussion
Proposer: Hana Hourston
Proposed Date: June 15, 2020
Comments:
Units: 1 (UUUU)
New Term
Echo intensity from the sea water body in counts by moored acoustic doppler current profiler. Echo intensity data are output in units proportional to decibels (dB). Data are obtained from the receiver’s received signal strength indicator (RSSI) circuit. Source: https://www.physics.mun.ca/~bdeyoung/P6314/doc/Broadband%20Primer.pdf

correlation_magnitude_in_sea_water

under discussion
Proposer: Hana Hourston
Proposed Date: June 15, 2020
Comments:
Units: 1 (UUUU)
New Term
Correlation magnitude of acoustic signal returns in counts from the water body by moored acoustic doppler current profiler. Correlation is a measure of data quality, and its output is scaled in units such that the expected correlation (given high signal/noise ratio, S/N) is 128. Source: https://www.physics.mun.ca/~bdeyoung/P6314/doc/Broadband%20Primer.pdf

percent_good_signal_returns_in_sea_water

under discussion
Proposer: Hana Hourston
Proposed Date: June 15, 2020
Comments:
Units: 1 (UUUU)
New Term
Acceptable proportion of signal returns as a percentage by moored acoustic doppler current profiler. Percent-good data indicate what fraction of data passed a variety of criteria. Rejection criteria include low correlation, large error velocity and fish detection (false target threshold). Default thresholds differ for each ADCP; each threshold has an associated command. Source: https://www.physics.mun.ca/~bdeyoung/P6314/doc/Broadband%20Primer.pdf

sea_water_velocity_error

under discussion
Proposer: Hana Hourston
Proposed Date: June 15, 2020
Comments:
Units: m s-1 (UVAA)
New Term
A velocity is a vector quantity. The error velocity is the difference between two estimates of vertical velocity, one estimate from the East-West pair of beams and the other from the North-South pair of beams. Source: https://www.physics.mun.ca/~bdeyoung/P6314/doc/Broadband%20Primer.pdf

downward_heat_flux_at_snow_base

new
Proposer: Martin Jukes
Proposed Date: May 13, 2020
Comments:
Units: W m-2 (UFAA)
New Term
"Downward" indicates a vector component which is positive when directed downward (negative upward). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.

upward_geothermal_heat_flux_at_ground_level_in_land_ice

new
Proposer: Martin Jukes
Proposed Date: Sept. 30, 2019
Comments:
Units: W m-2 (UFAA)
Updated term description
"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. "ground_level" means the land surface (including beneath snow, ice and surface water, if any). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Upward" indicates a vector component which is positive when directed upward (negative downward). The quantity with standard name upward_geothermal_heat_flux_at_ground_level_in_land_ice is the upward heat flux at the interface between the ice and bedrock. It does not include any heat flux from the ocean into an ice shelf.

potential_vorticity_of_atmosphere_layer

new
Proposer: Beate Geyer
Proposed Date: March 11, 2020
Comments:
Units: Pa-1 s-1 (PPPS)
Updated term description
"Layer" means any layer with upper and lower boundaries that have constant values in some vertical coordinate. There must be a vertical coordinate variable indicating the extent of the layer(s). If the layers are model layers, the vertical coordinate can be model_level_number, but it is recommended to specify a physical coordinate (in a scalar or auxiliary coordinate variable) as well. Atmosphere potential vorticity is the vertically averaged absolute vorticity of a layer of the atmosphere divided by the pressure difference from the bottom to the top of the layer.

atmosphere_y_relative_vorticity

under discussion
Proposer: Beate Geyer/Ronny Petrik
Proposed Date: March 11, 2020
Comments:
The vorticity is a vector quantity. "y" indicates a vector component along the grid y-axis, positive with increasing y. Atmosphere y relative vorticity is the y-component of the 3D air vorticity vector. “Relative” means only the vorticity of air and does not consider the Earth’s rotation.

atmosphere_x_relative_vorticity

under discussion
Proposer: Beate Geyer/Ronny Petrik
Proposed Date: March 11, 2020
Comments:
The vorticity is a vector quantity. "x" indicates a vector component along the grid x-axis, positive with increasing x. Atmosphere x relative vorticity is the x-component of the 3D air vorticity vector. “Relative” means only the vorticity of air and does not consider the Earth’s rotation.

atmosphere_upward_absolute_vorticity

new
Proposer: Beate Geyer/Ronny Petrik
Proposed Date: March 11, 2020
Comments:
Units: s-1 (PRSC)
Term change from Term: atmosphere_absolute_vorticity
The vorticity is a vector quantity. "Upward" indicates a vector component which is positive when directed upward (negative downward). Atmosphere upward absolute vorticity is the sum of the atmosphere upward relative vorticity and the vertical component of vorticity due to the Earth’s rotation.

atmosphere_upward_relative_vorticity

new
Proposer: Beate Geyer/Ronny Petrik
Proposed Date: March 11, 2020
Comments:
Units: s-1 (PRSC)
Term change from Term: atmosphere_relative_vorticity
The vorticity is a vector quantity. "Upward" indicates a vector component which is positive when directed upward (negative downward). Atmosphere upward relative vorticity is the vertical component of the 3D air vorticity vector. The vertical component arises from horizontal velocity only. “Relative” means only the vorticity of air and does not consider the Earth’s rotation. In contrast, the “atmosphere_upward_absolute_vorticity” considers the Earth’s rotation.

surface_shortwave_dust_ambient_aerosol_direct_radiative_effect

under discussion
Proposer: Martin Juckes
Proposed Date: April 24, 2019
Comments:
Units: W m-2 (UFAA)
Term change from Term: surface_net_downward_shortwave_dust_ambient_aerosol_particles_direct_radiative_effect
The surface called "surface" means the lower boundary of the atmosphere. The term "shortwave" means shortwave radiation. "X_direct_radiative_effect" refers to the instantaneous radiative impact of X on the Earth's energy balance, excluding secondary effects such as changes in cloud cover which may be caused by X. A positive radiative forcing or radiative effect is equivalent to a downward radiative flux and contributes to a warming of the earth system. "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.

surface_longwave_dust_ambient_aerosol_direct_radiative_effect_assuming_clear_sky

under discussion
Proposer: Martin Juckes
Proposed Date: April 24, 2019
Comments:
Units: W m-2 (UFAA)
Term change from Term: surface_net_downward_longwave_dust_ambient_aerosol_particles_direct_radiative_effect_assuming_clear_sky
The surface called "surface" means the lower boundary of the atmosphere. The term "longwave" means longwave radiation. "X_direct_radiative_effect" refers to the instantaneous radiative impact of X on the Earth's energy balance, excluding secondary effects such as changes in cloud cover which may be caused by X. A positive radiative forcing or radiative effect is equivalent to a downward radiative flux and contributes to a warming of the earth system. "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. 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. "Clear sky" means in the absence of clouds.

toa_longwave_dust_ambient_aerosol_direct_radiative_effect_assuming_clear_sky

under discussion
Proposer: Martin Juckes
Proposed Date: April 24, 2019
Comments:
Units: W m-2 (UFAA)
Term change from Term: toa_longwave_dust_ambient_aerosol_particles_direct_radiative_effect_assuming_clear_sky
The abbreviation "toa" means top of atmosphere. The term "longwave" means longwave radiation. "X_direct_radiative_effect" refers to the instantaneous radiative impact of X on the Earth's energy balance, excluding secondary effects such as changes in cloud cover which may be caused by X. A positive radiative forcing or radiative effect is equivalent to a downward radiative flux and contributes to a warming of the earth system. "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. 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. "Clear sky" means in the absence of clouds.

surface_shortwave_dust_ambient_aerosol_direct_radiative_effect_assuming_clear_sky

under discussion
Proposer: Martin Juckes
Proposed Date: April 24, 2019
Comments:
Units: W m-2 (UFAA)
Term change from Term: surface_net_downward_shortwave_dust_ambient_aerosol_particles_direct_radiative_effect_assuming_clear_sky
The surface called "surface" means the lower boundary of the atmosphere. The term "shortwave" means shortwave radiation. "X_direct_radiative_effect" refers to the instantaneous radiative impact of X on the Earth's energy balance, excluding secondary effects such as changes in cloud cover which may be caused by X. A positive radiative forcing or radiative effect is equivalent to a downward radiative flux and contributes to a warming of the earth system. "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. 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. "Clear sky" means in the absence of clouds.

surface_longwave_dust_ambient_aerosol_direct_radiative_effect

under discussion
Proposer: Martin Juckes
Proposed Date: April 24, 2019
Comments:
Units: W m-2 (UFAA)
Term change from Term: surface_net_downward_longwave_dust_ambient_aerosol_particles_direct_radiative_effect
The surface called "surface" means the lower boundary of the atmosphere. The term "longwave" means longwave radiation. "X_direct_radiative_effect" refers to the instantaneous radiative impact of X on the Earth's energy balance, excluding secondary effects such as changes in cloud cover which may be caused by X. A positive radiative forcing or radiative effect is equivalent to a downward radiative flux and contributes to a warming of the earth system. "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.

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_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.

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.

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_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 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". "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_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 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". "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-.

vertical_component_of_curl_of_surface_downward_stress

under discussion
Proposer: Bruce Hackett
Proposed Date: Jan. 19, 2016
Comments:
Units: N m-3 (NCUM)
New Term
The surface downward stress is the wind stress on the surface. The quantity with standard name vertical_component_of_curl_of_surface_downward_stress 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.

divergence_of_surface_downward_stress

under discussion
Proposer: Bruce Hackett
Proposed Date: Jan. 19, 2016
Comments:
Units: N m-3 (NCUM)
New Term
The surface downward stress is the wind stress on the surface. The quantity with standard name divergence_of_surface_downward_stress 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. The surface called "surface" means the lower boundary of the atmosphere.