116 proposals match your search

amplitude_of_global_mean_sea_level_change

under discussion

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Proposer: Jonathan Gregory

Proposed Date: 26 Jun 2024

Comments: #329

CF mailing list link: new and changed standard names for sea level to support IPCC AR7 and CMIP7

Units: m (ULAA)

Term change from Term: amplitude_of_global_average_sea_level_change

Global average sea level change is due to change in volume of the water in the ocean, caused by mass and/or density change, or to change in the volume of the ocean basins, caused by tectonics etc. It is sometimes called "eustatic", which is a term that also has other definitions. It differs from the change in the global average sea surface height relative to the centre of the Earth by the global average vertical movement of the ocean floor. Zero sea level change is an arbitrary level. Amplitude is the magnitude of a wave modelled by a sinusoidal function. A coordinate variable of harmonic_period should be used to specify the period of the sinusoidal wave. Because global average sea level change quantifies the change in volume of the world ocean, it is not calculated necessarily by considering local changes in mean sea level.

rate_of_global_mean_sea_level_change

under discussion

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Proposer: Jonathan Gregory

Proposed Date: 26 Jun 2024

Comments: #329

CF mailing list link: new and changed standard names for sea level to support IPCC AR7 and CMIP7

Units: m year-1 (MPYR)

Term change from Term: tendency_of_global_average_sea_level_change

Global average sea level change is due to change in volume of the water in the ocean, caused by mass and/or density change, or to change in the volume of the ocean basins, caused by tectonics etc. It is sometimes called "eustatic", which is a term that also has other definitions. It differs from the change in the global average sea surface height relative to the centre of the Earth by the global average vertical movement of the ocean floor. Zero sea level change is an arbitrary level. "tendency_of_X" means derivative of X with respect to time. Because global average sea level change quantifies the change in volume of the world ocean, it is not calculated necessarily by considering local changes in mean sea level.

global_mean_sea_level_change

under discussion

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Proposer: Jonathan Gregory

Proposed Date: 26 Jun 2024

Comments: #329

CF mailing list link: new and changed standard names for sea level to support IPCC AR7 and CMIP7

Units: m (ULAA)

Term change from Term: global_average_sea_level_change

Global average sea level change is due to change in volume of the water in the ocean, caused by mass and/or density change, or to change in the volume of the ocean basins, caused by tectonics etc. It is sometimes called "eustatic", which is a term that also has other definitions. It differs from the change in the global average sea surface height relative to the centre of the Earth by the global average vertical movement of the ocean floor. Zero sea level change is an arbitrary level. Because global average sea level change quantifies the change in volume of the world ocean, it is not calculated necessarily by considering local changes in mean sea level.

change_in_sea_surface_height_due_to_change_in_air_pressure_and_wind_at_high_frequency

under discussion

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Proposer: Jonathan Gregory

Proposed Date: 26 Jun 2024

Comments: #329

CF mailing list link: new and changed standard names for sea level to support IPCC AR7 and CMIP7

Units: m (ULAA)

Term change from Term: sea_surface_height_correction_due_to_air_pressure_and_wind_at_high_frequency

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. "Air pressure and wind at high frequency" means variations in air pressure with periods shorter than 20 days. These give rise to corresponding variations in sea surface topography. The quantity sea_surface_height_correction_due_to_air_pressure_and_wind_at_high_frequency should be applied by adding it to the quantity with standard name altimeter_range. Additional altimeter range corrections are given by the quantities with standard names altimeter_range_correction_due_to_wet_troposphere, altimeter_range_correction_due_to_dry_troposphere, altimeter_range_correction_due_to_ionosphere and sea_surface_height_correction_due_to_air_pressure_at_low_frequency.

change_in_sea_surface_height_due_to_change_in_air_pressure_at_low_frequency

under discussion

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Proposer: Jonathan Gregory

Proposed Date: 26 Jun 2024

Comments: #329

CF mailing list link: new and changed standard names for sea level to support IPCC AR7 and CMIP7

Units: m (ULAA)

Term change from Term: sea_surface_height_correction_due_to_air_pressure_at_low_frequency

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. "Air pressure at low frequency" means variations in air pressure with periods longer than 20 days. These give rise to corresponding variations in sea surface topography. The quantity sea_surface_height_correction_due_to_air_pressure_at_low_frequency is commonly called the "inverted barometer effect" and the correction should be applied by adding it to the quantity with standard name altimeter_range. Additional altimeter range corrections are given by the quantities with standard names altimeter_range_correction_due_to_wet_troposphere, altimeter_range_correction_due_to_dry_troposphere, altimeter_range_correction_due_to_ionosphere and sea_surface_height_correction_due_to_air_pressure_and_wind_at_high_frequency.

phase_of_global_mean_sea_level_change

under discussion

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Proposer: Jonathan Gregory

Proposed Date: 26 Jun 2024

Comments: #329

CF mailing list link: new and changed standard names for sea level to support IPCC AR7 and CMIP7

Units: degree (UAAA)

Term change from Term: phase_of_global_average_sea_level_change

Global average sea level change is due to change in volume of the water in the ocean, caused by mass and/or density change, or to change in the volume of the ocean basins, caused by tectonics etc. It is sometimes called "eustatic", which is a term that also has other definitions. It differs from the change in the global average sea surface height relative to the centre of the Earth by the global average vertical movement of the ocean floor. Zero sea level change is an arbitrary level. Phase is the initial angle of a wave modelled by a sinusoidal function. A coordinate variable of harmonic_period should be used to specify the period of the sinusoidal wave. Because global average sea level change quantifies the change in volume of the world ocean, it is not calculated necessarily by considering local changes in mean sea level.

surface_upwelling_longwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air

accepted

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Proposer: Fiona O'Connor

Proposed Date: 3 Jul 2024

Comments: #332, #299

CF mailing list link: Add missing surface radiative flux diagnostic following on from #299

Units: W/m2 (UFAA)

New Term

The surface called "surface" means the lower boundary of the atmosphere. The term "longwave" means longwave radiation. Upwelling radiation is radiation from below. It does not mean "net upward". The sign convention is that "upwelling" is positive upwards and "downwelling" is positive downwards. 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. 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. The 3D ozone field acts as a reference ozone field in a diagnostic call to the model's radiation scheme. It is expressed in terms of mole fraction of ozone in air. It may be observation-based or model-derived. It may be from any time period. By using the same ozone reference in the diagnostic radiation call in two model simulations and calculating differences between the radiative flux diagnostics from the prognostic call to the radiation scheme and the diagnostic call to the radiation scheme with the ozone reference, an instantaneous radiative forcing for ozone can be calculated.

modis_cloud_area_fraction

under discussion

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Proposer: Brandon Duran

Proposed Date: 25 Jun 2024

Comments: #328

CF mailing list link: Standard names: Propose new additions to the standard names table (MODIS output from COSP simulator)

Units: 1 (UUUU)

New Term

The MODIS cloud area fraction is diagnosed from atmosphere model output by the MODIS simulator software in such a way as to be comparable with the observational diagnostics of MODIS (Moderate Resolution Imaging Spectroradiometer). Cloud area fraction is also called “cloud amount” and “cloud cover.” As seen from above, mean fraction of grid column occupied by cloud of optical depths and heights specified by the tau and pressure intervals given above. Dimensions of the histogram are cloud top pressure and cloud optical depth. To distinguish that these are cloud area fractions as seen by a specific satellite instrument simulator, not the same as cloud area fractions diagnosed by the native model, the prefix format of satellite name_ is employed.

global_average_sea_level_change_due_to_change_in_ocean_mass

accepted

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Proposer: Aurore Biardeau, Stéphane Law-Chune

Proposed Date: 13 May 2024

Comments: #314

CF mailing list link: Standard names: *Global average sea level change due to water mass budget*

Units: m (ULAA)

New Term

Global average mass volume sea level change is caused by water mass balance (evaporation – precipitation + runoff). This in turn results in a change in volume of the world ocean. Zero sea level change is an arbitrary level. 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. Because global average sea level change quantifies the change in volume of the world ocean, it is not calculated necessarily by considering local changes in mean sea level. This quantity is sometimes called "barystatic sea level rise" or "barystatic sea level change". It is the part of global-mean sea-level rise which is due to the addition to the ocean of water mass that formerly resided within the land area (as land water storage or land ice) or in the atmosphere (which contains a relatively tiny mass of water).

mass_concentration_of_chlorophyll_a_in_sea_water_horizontal_gradient

under discussion

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Proposer: Aurore Biardeau

Proposed Date: 13 May 2024

Comments: #315

CF mailing list link: Standard names: *Norm of the horizontal gradient of the chlorophyll concentration*

Units: mg m-3 km-1

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'. 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-a is the most commonly occurring form of natural chlorophyll. The chemical formula of chlorophyll-a is C55H72O5N4Mg.

nfdrs_10_hour_fuel_moisture

accepted

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Proposer: Lee Kessenich

Proposed Date: 18 Apr 2024

Comments: #308

CF mailing list link: Standard names: additional wildland fire indexes

Units: % (UPCT)

New Term

10 hour fuel moisture (FM10) represents the modeled moisture content of dead fuels consisting of roundwood in the size range of one quarter to 1 inch in diameter and very roughly, the layer of litter extending from just below the surface to three-quarters of inch below the surface. The 10-hour timelag fuel moisture is a function of length of day (as influenced by latitude and calendar date), daily downwelling shortwave radiation, daily maximum temperature and minimum relative humidity, and daily precipitation values. It is a component in the US National Fire Danger Rating System (cf. https://www.bia.gov/sites/default/files/dup/assets/public/pdf/idc-020513.pdf). The US National Fire Danger Rating System comprises several numeric indexes that rate the potential over a large area for wildland fires to ignite, spread, and require action to suppress or manage. It was designed for use in the continental United States, and all its components are relative, not absolute.

nfdrs_1_hour_fuel_moisture

accepted

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Proposer: Lee Kessenich

Proposed Date: 18 Apr 2024

Comments: #308

CF mailing list link: Standard names: additional wildland fire indexes

Units: % (UPCT)

New Term

1 hour fuel moisture (FM1) represents the modeled moisture content of dead fuels consisting of herbaceous plants or roundwood less than one-quarter inch in diameter. It also includes the uppermost layer of litter on the forest floor. The 1-hour timelag fuel moisture is a function of length of day (as influenced by latitude and calendar date), daily downwelling shortwave radiation, daily maximum temperature and minimum relative humidity, and daily precipitation values. It is a component in the US National Fire Danger Rating System (cf. https://www.bia.gov/sites/default/files/dup/assets/public/pdf/idc-020513.pdf). The US National Fire Danger Rating System comprises several numeric indexes that rate the potential over a large area for wildland fires to ignite, spread, and require action to suppress or manage. It was designed for use in the continental United States, and all its components are relative, not absolute .

acoustic_equivalent_area_in_sea_water

accepted

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Proposer: John Horne, Mark Yamane, Rob Cermak

Proposed Date: 18 Mar 2024

Comments: #298

CF mailing list link: Standard names: additional active acoustic standard names

Units: m (ULAA)

New Term

Acoustic equivalent area is the squared area backscattering coefficient divided by the depth integral of squared volume backscattering coefficient. Area backscattering coefficient is the integral of the volume backscattering coefficient over a defined distance. Volume backscattering coefficient is the linear form of acoustic_volume_backscattering_strength_in_sea_water. The parameter is computed to provide a value that represents the area that would be occupied if all data cells contained the mean density and is the reciprocal of acoustic_index_of_aggregation_in_sea_water. For further details see Urmy et. al (2012) doi:10.1093/icesjms/fsr205 and Woillez et. al (2007) doi.org/10.1093/icesjms/fsm025.

acoustic_index_of_aggregation_in_sea_water

accepted

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Proposer: John Horne, Mark Yamane, Rob Cermak

Proposed Date: 18 Mar 2024

Comments: #298

CF mailing list link: Standard names: additional active acoustic standard names

Units: m-1 (UPRM)

New Term

Acoustic index of aggregation is the depth integral of squared volume backscattering coefficient divided by the squared area backscattering coefficient. Volume backscattering coefficient is the linear form of acoustic_volume_backscattering_strength_in_sea_water. Area backscattering coefficient is the integral of the volume backscattering coefficient over a defined distance. The parameter is computed to provide a value that represents the patchiness of biomass in the water column in the field of fisheries acoustics - the value is high when small areas are much denser than the rest of the distribution. The parameter is also the reciprocal of acoustic_equivalent_area_in_sea_water. For further details see Urmy et. al (2012) doi:10.1093/icesjms/fsr205 and Woillez et. al (2007) doi.org/10.1093/icesjms/fsm025.

acoustic_inertia_in_sea_water

accepted

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Proposer: John Horne, Mark Yamane, Rob Cermak

Proposed Date: 18 Mar 2024

Comments: #298

CF mailing list link: Standard names: additional active acoustic standard names

Units: m-2 (PMSQ)

New Term

Acoustic inertia is the sum of squared distances from the acoustic_centre_of_mass weighted by the volume backscattering coefficient at each distance and normalized by the total area backscattering coefficient. Volume backscattering coefficient is the linear form of acoustic_volume_backscattering_strength_in_sea_water. Area backscattering coefficient is the integral of the volume backscattering coefficient over a defined distance. For further details see Urmy et. al (2012) doi:10.1093/icesjms/fsr205 and Bez and Rivoirard (2001) doi:10.1016/S0165-7836(00)00241-1.

spectral_width_of_radio_wave_in_air_scattered_by_air

accepted

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Proposer: Ingemar Häggström

Proposed Date: 1 Oct 2021

Comments: #133

CF mailing list link: Standard names: atmospheric radar terms

Units: Hz (UTHZ)

Updated term description

Frequency width of the radio wave, that was transmitted by an instrument and propagates in the air where it's scattered by the air due to which its properties change, and it is received by an instrument. The "instrument" (examples are radar and lidar) is the device used to make the observation. The "scatterers" are what causes the transmitted signal to be returned to the instrument (examples are aerosols, hydrometeors and refractive index irregularities in the air). A standard name referring to frequency spectra width of the signal received at the instrument.

change_in_sea_floor_height_above_reference_ellipsoid_due_to_ocean_tide_loading

accepted

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Proposer: Aurore Biardeau, Stéphane Law-Chune

Proposed Date: 7 Mar 2024

Comments: 288

CF mailing list link: Standard names: *Ocean surface elevation due to load tides*

Units: m (ULAA)

New Term

Sea surface height is a time-varying quantity. A reference ellipsoid is a regular mathematical figure that approximates the irregular shape of the geoid. A number of reference ellipsoids are defined for use in the field of geodesy. 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. Tides are a significant contributor to the observed sea surface height. The load tidal component of sea surface height describes the variability of the sea surface due to the deformation of the Earth because of the weight of the water masses displaced by ocean tides.

upward_heat_flux_at_base_of_grounded_ice_sheet

under discussion

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Proposer: Martin Jukes

Proposed Date: 30 Sep 2019

Comments:

CF mailing list link: Bedrock .. and heat fluxes out of bedrock

Units: W m-2 (UFAA)

Term change from Term: upward_geothermal_heat_flux_at_ground_level_in_land_ice

"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_heat_flux_at_base_of_grounded_ice_sheet 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.

ratio_of_sea_water_potential_temperature_anomaly_to_relaxation_timescale

under discussion

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Proposer:

Proposed Date: None

Comments:

CF mailing list link:

Units: K s-1 (KPRS)

Updated term description

The quantity with standard name ratio_of_sea_water_potential_temperature_anomaly_to_relaxation_timescale is a correction term applied to modelled sea water potential temperature. The term is estimated as the deviation of model local sea water potential temperature from an observation-based climatology (e.g. World Ocean Database) weighted by a user-specified relaxation coefficient in s-1 (1/(relaxation timescale)). Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure. The phrase "ratio_of_X_to_Y" means X/Y. The term "anomaly" means difference from climatology. It is strongly recommended to include a units_metadata attribute.

freezing_temperature_of_sea_water

under discussion

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Proposer: Jonathan Gregory & Lars Barring

Proposed Date: 10 Jan 2024

Comments: #270

CF mailing list link: Classification of existing standard names for units_metadata

Units: K (UPKA)

Updated term description

It is strongly recommended that a variable with this standard name should have a units_metadata attribute, with one of the values "on-scale" or "difference", whichever is appropriate for the data, because it is essential to know whether the temperature is on-scale (meaning relative to the origin of the scale indicated by the units) or refers to temperature differences (implying that the origin of the temperature scale is irrevelant), in order to convert the units correctly (cf. https://cfconventions.org/cf-conventions/cf-conventions.html#temperature-units).

water_surface_height_above_reference_datum

under discussion

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Proposer: Fernando Manzano

Proposed Date: 30 May 2023

Comments:

CF mailing list link: Standard names: tidal_sea_surface_height_above_reference_datum and sea_level_residual

Units: m (ULAA)

Updated term description

'Water surface height above reference datum' means the height of the upper surface of a body of liquid water, such as sea, lake or river, above an arbitrary reference datum. The altitude of the datum should be provided in a variable with standard name water_surface_reference_datum_altitude. The surface called "surface" means the lower boundary of the atmosphere. Nevertheless, the reference datum could be a geophysical surface, a height with respect to a geophysical surface, or a local benchmark attached to the land. Because the definition of the datum may vary from one place to another, spatial differences in actual tidal_sea_surface_height_above_reference_datum are not generally physically meaningful. However, local differences in this quantity over time are physically meaningful.

number_of_days_with_air_temperature_above_threshold

under discussion

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Proposer: Klaus Zimmermann

Proposed Date: 23 Sep 2021

Comments:

CF mailing list link: Standard names: *_threshold, allow for percentile based thresholds

Units: 1 (UUUU)

Updated term description

Air temperature is the bulk temperature of the air, not the surface (skin) temperature. A variable whose standard name has the form number_of_days_with_X_below|above_threshold is a count of the number of days on which the condition X_below|above_threshold is satisfied. 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". It must give information about the threshold in one or both of the following two ways. With an explicit threshold in a coordinate variable or scalar coordinate variable with the standard name of X, or with a percentile threshold given in a scalar coordinate variable with the standard name cumulative_probability_of_X.

mass_concentration_of_prochlorococcus_expressed_as_chlorophyll_in_sea_water

under discussion

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Proposer: Corinne Derval

Proposed Date: 13 Nov 2020

Comments:

CF mailing list link: Standard names: Phytoplankton Functional Type

Units: mg m-3 (UMMC)

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. Prochlorococcus are marine Prokaryotes with an extremely small cell, containing divinyl chlorophyll a and b as their primary photosynthetic pigments and adapted to the high-light, oligotrophic, warm waters of the tropical and subtropical regions of the world’s oceans.

mass_concentration_of_haptophytes_expressed_as_chlorophyll_in_sea_water

under discussion

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Proposer: Corinne Derval

Proposed Date: 13 Nov 2020

Comments:

CF mailing list link: Standard names: Phytoplankton Functional Type

Units: mg m-3 (UMMC)

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. Haptophytes are mainly unicellular marine algae which play an important role in the DMSP production and in calcifying.

mass_concentration_of_greenalgae_expressed_as_chlorophyll_in_sea_water

under discussion

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Proposer: Corinne Derval

Proposed Date: 13 Nov 2020

Comments:

CF mailing list link: Standard names: Phytoplankton Functional Type

Units: mg m-3 (UMMC)

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. Green Alge are small green unicellular flagellates caractherized by the presence of Chlorophyll b.

mass_concentration_of_cryptophytes_expressed_as_chlorophyll_in_sea_water

under discussion

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Proposer: Corinne Derval

Proposed Date: 13 Nov 2020

Comments:

CF mailing list link: Standard names: Phytoplankton Functional Type

Units: mg m-3 (UMMC)

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. Cryptophytes are flaggellated unicellular organisms attributable to nanophytoplanktonic component, very rich in fatty acids and therefore a high quality food source for herbivorous zooplankton.

mass_concentration_of_dinoflagellates_expressed_as_chlorophyll_in_sea_water

under discussion

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Proposer: Corinne Derval

Proposed Date: 13 Nov 2020

Comments:

CF mailing list link: Standard names: Phytoplankton Functional Type

Units: mg m-3 (UMMC)

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. Dinoflagellates (dinophytes) are mostly unicellular, rarely colonial, biflagellated algae with cell walls firm, or reinforced with polygonal plates. They produce some of the most potent toxins known.

mass_concentration_of_prokaryotes_expressed_as_chlorophyll_in_sea_water

under discussion

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Proposer: Corinne Derval

Proposed Date: 13 Nov 2020

Comments:

CF mailing list link: Standard names: Phytoplankton Functional Type

Units: mg m-3 (UMMC)

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. Prokaryotes group refers to those phytoplankters characterized by a prokaryotic cell and represents the main component of picophytoplankton.

tidal_sea_surface_height_above_reference_datum

under discussion

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Proposer: Fernando Manzano on behalf of the Copernicus Marine In Situ TAC Sea Level Reprocessed product Team

Proposed Date: 30 May 2023

Comments:

CF mailing list link: Standard names: tidal_sea_surface_height_above_reference_datum and sea_level_residual

Units: m (ULAA)

New Term

"Sea surface height" is a time-varying quantity. "Height_above_X" means the vertical distance above the named surface X, in this case above an arbitrary reference datum. The tidal component of sea surface height describes the predicted variability of the sea surface due to astronomic forcing (chiefly lunar and solar cycles) and shallow water resonance of tidal components; for example as generated based on harmonic analysis, or resulting from the application of harmonic tidal series as boundary conditions to a numerical tidal model. The reference datum could be a geophysical surface, a height with respect to a geophysical surface, or a local benchmark attached to the land. Because the definition of the datum may vary from one place to another, spatial differences in actual tidal_sea_surface_height_above_reference_datum are not generally physically meaningful. However, local differences in this quantity over time are physically meaningful.

mole_concentration_of_prokaryotes_expressed_as_carbon_in_sea_water

under discussion

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Proposer: Gunnar Bratbak

Proposed Date: 4 Apr 2022

Comments:

CF mailing list link: Standard names: Nansen Legacy Project 01

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 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. "Prokaryotes” are all Bacteria and Archaea excluding photosynthetic cyanobacteria such as Synechococcus and Prochlorococcus or other separately named components of the procaryotic population.

mass_concentration_of_prokaryotes_expressed_as_carbon_in_sea_water

under discussion

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Proposer: Gunnar Bratbak

Proposed Date: 4 Apr 2022

Comments:

CF mailing list link: Standard names: Nansen Legacy Project 01

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 or biological group 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. "Prokaryotes” are all Bacteria and Archaea excluding photosynthetic cyanobacteria such as Synechococcus and Prochlorococcus or other separately named components of the procaryotic population.

water_evapotranspiration_flux

under discussion

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Proposer:

Proposed Date: None

Comments:

CF mailing list link:

Units: kg m-2 s-1 (KSP2)

Updated term description

Water means water in all phases. Evaporation is the conversion of liquid or solid into vapor. (The conversion of solid alone into vapor is called "sublimation".) The process of transpiration is not included. 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. In the versions before 56 transpiration was not mentioned and for versions 56 to 71 it was allowed to use water_evaporation_flux as an alias.

water_evapotranspiration_amount

under discussion

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Proposer: Beate Geyer

Proposed Date: 18 Jun 2021

Comments:

CF mailing list link: Standard names: Additional evapotranspiration names

Units: kg m-2 (KMP2)

New Term

Water means water in all phases. "Evapotranspiration" means all water vapor fluxes into the atmosphere from the surface: liquid evaporation, sublimation, and transpiration. Evaporation is the conversion of liquid or solid into vapor. Transpiration is the process by which water is carried from the roots of plants and evaporates from the stomata. (The conversion of solid alone into vapor is called "sublimation".) "Amount" means mass per unit area. Unless indicated in the cell_methods attribute, a quantity is assumed to apply to the whole area of each horizontal grid box.

water_potential_evapotranspiration_amount

under discussion

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Proposer: Beate Geyer

Proposed Date: 18 Jun 2021

Comments:

CF mailing list link: Standard names: Additional evapotranspiration names

Units: kg m-2 (KMP2)

New Term

"Water" means water in all phases. "Evapotranspiration" means all water vapor fluxes into the atmosphere from the surface: liquid evaporation, sublimation, and transpiration. Evaporation is the conversion of liquid or solid into vapor. Transpiration is the process by which water is carried from the roots of plants and evaporates from the stomata. (The conversion of solid alone into vapor is called "sublimation".) Potential evapotranspiration is the rate at which evaporation would take place under unaltered ambient conditions (temperature, relative humidity, wind, etc.) if the supply of water were unlimited, on the surface as if from an open water surface and unlimited in the soil. "Amount" means mass per unit area.

concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_fluorescence_in_raman_units

under discussion

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Proposer: Yannick Kern & Colin Stedmon

Proposed Date: 17 Mar 2023

Comments:

CF mailing list link: Standard names: *ocean measurements: dissolved organic matter*

Units: nm-1

New Term

Also commonly known as Chromophoric Dissolved Organic Matter (CDOM). CDOM plays an important role in the carbon cycling and biogeochemistry of coastal waters. It occurs naturally in aquatic environments primarily as a result of matter released from decaying plant and animal matter, which can enter coastal areas in river run-off containing organic materials leached from soils. Fluorescence intensity is normalised to the integrated Raman scattering peak of pure water from excitation at 350 nm, and therefore reported in Raman Units. The wavelengths that fluorescence is measured at will depend on the sensor used and is stated as an radiation_wavelength attribute (eg. “Ex350nm Em460nm”).

enrichment_of_15N_in_particulate_nitrogen_in_particles_in_sea_water_expressed_as_lowercase_delta_15N_relative_to_atmospheric_nitrogen

under discussion

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Proposer: Fernando Carvalho Pacheco & Fernando Santiago-Mandujano & Karin Bjorkman & Andrew Barna

Proposed Date: 19 Oct 2021

Comments: Github #135 17. Is this the same as term 10? (Term 18 withdrawn as duplicate of term 11).

CF mailing list link: Standard names: Second Batch - 19 variables from the Hawaii Ocean Time-series (HOT)

Units: 1 (UUUU)

New Term

Isotopic enrichment of 15N, often called d15N or delta 15N (lower case delta), is a measure of the ratio of stable isotopes 15N:14N. Reference: Karl, D. (2018) Sediment trap flux measurements from the Hawaii Ocean Time-Series (HOT) project at station ALOHA. Biological and Chemical Oceanography Data Management Office (BCO-DMO). doi:10.1575/1912/bco-dmo.737393.1.

mass_concentration_of_phycoerythrin_5_in_sea_water

under discussion

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Proposer: Fernando Carvalho Pacheco & Fernando Santiago-Mandujano & Karin Bjorkman & Andrew Barna

Proposed Date: 19 Oct 2021

Comments: Github #135 8.

CF mailing list link: Standard names: Second Batch - 19 variables from the Hawaii Ocean Time-series (HOT)

Units: kg m-3 (UKMC)

New Term

mass_concentration_of_phycoerythrin_4_in_sea_water

under discussion

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Proposer: Fernando Carvalho Pacheco & Fernando Santiago-Mandujano & Karin Bjorkman & Andrew Barna

Proposed Date: 19 Oct 2021

Comments: Github #135 7.

CF mailing list link: Standard names: Second Batch - 19 variables from the Hawaii Ocean Time-series (HOT)

Units: kg m-3 (UKMC)

New Term

under discussion

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Proposer: Martin Juckes

Proposed Date: 24 Apr 2019

Comments:

CF mailing list link: Some standard name updates to improve consistency.

Units: W m-2 (UFAA)

Term change from Term: surface_net_downward_shortwave_dust_ambient_aerosol_particles_direct_radiative_effect

global_mean_steric_sea_level_change

amplitude_of_global_mean_sea_level_change

rate_of_global_mean_sea_level_change

global_mean_sea_level_change

change_in_sea_surface_height_due_to_change_in_air_pressure_and_wind_at_high_frequency

change_in_sea_surface_height_due_to_change_in_air_pressure_at_low_frequency

phase_of_global_mean_sea_level_change

global_mean_thermosteric_sea_level_change

sterodynamic_change_in_sea_level

change_in_height_of_solid_surface_wrt_reference_ellipsoid

change_in_mean_sea_level_due_to_change_in_air_pressure

change_in_mean_sea_level_due_to_change_in_global_ocean_mass_and_geoid_and_solid_earth_deformation

change_in_mean_sea_level_due_to_change_in_geoid_and_solid_earth_deformation

manometric_change_in_sea_surface_height

manometric_change_in_mean_sea_level

change_in_ocean_dynamic_sea_level

mean_sea_level_height_above_reference_ellipsoid

change_in_mean_sea_level_wrt_reference_ellipsoid

surface_upwelling_longwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air

modis_liquid_topped_cloud_area_fraction

modis_ice_topped_cloud_area_fraction

modis_cloud_area_fraction

change_in_mean_sea_level_wrt_solid_surface

wave_mixing_energy_flux_into_sea_water

eastward_friction_velocity_in_sea_water

global_average_sea_level_change_due_to_change_in_ocean_mass

mass_concentration_of_chlorophyll_a_in_sea_water_horizontal_gradient

product_of_wind_speed_and_water_vapor_saturation_deficit_in_air

nfdrs_10_hour_fuel_moisture

nfdrs_1_hour_fuel_moisture

acoustic_proportion_occupied_in_sea_water

acoustic_centre_of_mass_in_sea_water

acoustic_equivalent_area_in_sea_water

acoustic_index_of_aggregation_in_sea_water

acoustic_inertia_in_sea_water

spectral_width_of_radio_wave_in_air_scattered_by_air

change_in_sea_surface_height_due_to_change_in_air_pressure

change_in_sea_floor_height_above_reference_ellipsoid_due_to_ocean_tide_loading

ocean_dynamic_sea_level

aragonite_saturation_state_in_sea_water

upward_heat_flux_at_base_of_grounded_ice_sheet

vegetation_roughtness_length

lwe_frozen_precipitation_rate

ratio_of_sea_water_potential_temperature_anomaly_to_relaxation_timescale

freezing_temperature_of_sea_water

eigenmode

true_state_pressure

true_state_altitude

virtual_temperature_of_air

virtual_potential_temperature_of_air

water_surface_height_above_reference_datum

mass_fraction_of_frozen_water_in_air

sea_ice_volume_fraction_of_ridged_ice

cumulative_probability_of_air_temperature

number_of_days_with_air_temperature_above_threshold

mass_concentration_of_prochlorococcus_expressed_as_chlorophyll_in_sea_water

mass_concentration_of_haptophytes_expressed_as_chlorophyll_in_sea_water

mass_concentration_of_greenalgae_expressed_as_chlorophyll_in_sea_water

mass_concentration_of_cryptophytes_expressed_as_chlorophyll_in_sea_water

mass_concentration_of_dinoflagellates_expressed_as_chlorophyll_in_sea_water

mass_concentration_of_prokaryotes_expressed_as_chlorophyll_in_sea_water

tidal_sea_surface_height_above_reference_datum

sea_floor_sediment_age_before_1950

mole_concentration_of_prokaryotes_expressed_as_carbon_in_sea_water

mass_concentration_of_prokaryotes_expressed_as_carbon_in_sea_water

water_evapotranspiration_flux

atmosphere_mass_content_of_rain

water_evapotranspiration_amount

water_potential_evapotranspiration_amount

downward_heat_flux_at_snow_base_in_snow

spectral_slope_of_volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter

concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_fluorescence_in_raman_units

water_volume_contained_in_river_channel

enrichment_of_15N_in_particulate_nitrogen_in_particles_in_sea_water_expressed_as_lowercase_delta_15N_relative_to_atmospheric_nitrogen

mass_concentration_of_phycoerythrin_5_in_sea_water

mass_concentration_of_phycoerythrin_4_in_sea_water

mass_concentration_of_phycoerythrin_10_in_sea_water

received_power_of_radio_wave_scattered_by_air

radio_signal_roundtrip_travel_time_in_air