Proposals for CF

Proposer: Patricia DeRepentigny

Proposed Date: 30 Aug 2024

Comments: #216

CF mailing list link: Standard names: Propose new name for integrated surface snow mass for use in SIMIP and CMIP7

Units: kg (KGXX)

New Term

Surface snow amount refers to the amount on the solid ground or on surface ice cover, but excludes, for example, falling snowflakes and snow on plants. The horizontal domain over which surface snow mass is calculated is described by the associated coordinate variables and coordinate bounds or by a coordinate variable or scalar coordinate variable with the standard name of "region" supplied according to section 6.1.1 of the CF conventions.

Proposer: Petr Šácha

Proposed Date: 3 Sep 2024

Comments: #217

CF mailing list link: Standard names: *Reynolds stresses from gravity wave parameterizations*

Units:

New Term

tauvnogw, for the vertical wave flux of meridional momentum within the non-orographic GW parameterization.

Proposer: Petr Šácha

Proposed Date: 3 Sep 2024

Comments: #217

CF mailing list link: Standard names: *Reynolds stresses from gravity wave parameterizations*

Units:

New Term

tauunogw, for the vertical wave flux of zonal momentum within the non-orographic GW parameterization.

Proposer: Petr Šácha

Proposed Date: 3 Sep 2024

Comments: #217

CF mailing list link: Standard names: *Reynolds stresses from gravity wave parameterizations*

Units:

New Term

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. "Upward" indicates a vector component which is positive when directed upward (negative downward). "Northward" indicates a vector component which is positive when directed northward (negative southward). "Upward northward" indicates the -ZX component of a tensor. An upward northward momentum flux is an upward flux of northward momentum, which accelerates the upper medium northward and the lower medium southward. Momentum flux is dimensionally equivalent to stress and pressure. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The total upward northward momentum flux due to gravity waves is the sum of the fluxes due to orographic gravity waves and nonorographic waves. The latter has the standard name upward_northward_momentum_flux_in_air_due_to_nonorographic_gravity_waves.

Proposer: Petr Šácha

Proposed Date: 3 Sep 2024

Comments: #217

CF mailing list link: Standard names: *Reynolds stresses from gravity wave parameterizations*

Units:

New Term

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. "Upward" indicates a vector component which is positive when directed upward (negative downward). "Westward" indicates a vector component which is positive when directed westward (negative eastward). "Upward westward" indicates the -ZX component of a tensor. An upward westward momentum flux is an upward flux of westward momentum, which accelerates the upper medium westward and the lower medium eastward. Momentum flux is dimensionally equivalent to stress and pressure. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The total upward westward momentum flux due to gravity waves is the sum of the fluxes due to orographic gravity waves and nonorographic waves. The latter has the standard name upward_westward_momentum_flux_in_air_due_to_nonorographic_gravity_waves.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #213

CF mailing list link: Standard names: Propose new additions to the standard names table for methane forcing for use in CMIP7

Units: W m-2 (UFAA)

New Term

The abbreviation "toa" means top of atmosphere. The term "shortwave" means shortwave radiation. The TOA outgoing shortwave flux is the reflected and scattered solar radiative flux i.e. the "upwelling" TOA shortwave flux, sometimes called the "outgoing shortwave radiation" or "OSR". 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.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #213

CF mailing list link: Standard names: Propose new additions to the standard names table for methane forcing for use in CMIP7

Units: W m-2 (UFAA)

New Term

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. "longwave" means longwave radiation. "toa" means top of atmosphere. The TOA outgoing longwave flux is the upwelling thermal radiative flux, often called the "outgoing longwave radiation" or "OLR". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Clear sky" means in the absence of clouds.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #213

CF mailing list link: Standard names: Propose new additions to the standard names table for methane forcing for use in CMIP7

Units: W m-2 (UFAA)

New Term

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. "longwave" means longwave radiation. "toa" means top of atmosphere. The TOA outgoing longwave flux is the upwelling thermal radiative flux, often called the "outgoing longwave radiation" or "OLR". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #213

CF mailing list link: Standard names: Propose new additions to the standard names table for methane forcing for use in CMIP7

Units: W m-2 (UFAA)

New Term

The abbreviation "toa" means top of atmosphere. The term "shortwave" means shortwave radiation. The TOA outgoing shortwave flux is the reflected and scattered solar radiative flux i.e. the "upwelling" TOA shortwave flux, sometimes called the "outgoing shortwave radiation" or "OSR". 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.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #213

CF mailing list link: Standard names: Propose new additions to the standard names table for methane forcing for use in CMIP7

Units: mol mol-1 (MPMX)

New Term

This methane field acts as a reference methane field in a diagnostic call to the radiation scheme. Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

The phrase "tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the particles. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol takes up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the aerosol. "Dry aerosol particles" means aerosol particles without any water uptake. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. the surface of the earth). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources. Chemically, "elemental carbon" is the carbonaceous fraction of particulate matter that is thermally stable in an inert atmosphere to high temperatures near 4000K and can only be gasified by oxidation starting at temperatures above 340 C. It is assumed to be inert and non-volatile under atmospheric conditions and insoluble in any solvent (Ogren and Charlson, 1983).

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

"Tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the molecules. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. earth's surface). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. "nmvoc" means non methane volatile organic compounds; The chemical formula for ammonia is NH3. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

"Tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the molecules. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. earth's surface). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. "nmvoc" means non methane volatile organic compounds; "nmvoc" is the term used in standard names to describe the group of chemical species having this classification 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. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

"Tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the molecules. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. earth's surface). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. "Nox" means nitric oxide (NO) and nitrogen dioxide (NO2). The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

"Tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the molecules. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. earth's surface). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. The chemical formula for carbon monoxide is CO. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

"Tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the molecules. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. earth's surface). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. The chemical formula for sulfur dioxide is SO2. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

"tendency_of_X" means derivative of X with respect to time. "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 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. "Aerosol" means the system of suspended liquid or solid particles in air (except cloud droplets) and their carrier gas, the air itself. Aerosol takes up ambient water (a process known as hygroscopic growth) depending on the relative humidity and the composition of the aerosol. "Dry aerosol particles" means aerosol particles without any water uptake. The term "particulate_organic_matter_dry_aerosol" means all particulate organic matter dry aerosol except elemental carbon. It is the sum of primary_particulate_organic_matter_dry_aerosol and secondary_particulate_organic_matter_dry_aerosol. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. the surface of the earth). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

The phrase "tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the molecules. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. earth's surface). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. The chemical formula for methane is CH4. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer: Fiona O'Connor

Proposed Date: 30 Aug 2024

Comments: #215

CF mailing list link: Standard names: Propose new names for emissions for trace gases and aerosols from all burning for use in AerChemMIP2 and CMIP7

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

New Term

The phrase "tendency_of_X" means derivative of X with respect to time. "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 mass is the total mass of the molecules. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. earth's surface). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. The chemical formula for dimethyl sulfide is (CH3)2S. Dimethyl sulfide is sometimes referred to as DMS. The term "all fires" comprises "forest fires", "Savanna and grassland fires" and "agricultural waste burning". The "forest fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in forests. "Forest fires" is the term used in standard names to describe a collection of emission sources. The "savanna and grassland fires" sector comprises the burning (natural and human-induced) of living or dead vegetation in non-forested areas. It excludes field burning of agricultural residues. "Savanna and grassland fires" is the term used in standard names to describe a collection of emission sources. The "agricultural waste burning" sector comprises field burning of agricultural residues. "Agricultural waste burning" is the term used in standard names to describe a collection of emission sources.

Proposer:

Proposed Date: None

Comments:

CF mailing list link:

Units: m (ULAA)

Updated term description

Acoustic centre of mass is the average of all sampled depths weighted by their volume backscattering coefficient. Volume backscattering coefficient is the linear form of acoustic_volume_backscattering_strength_in_sea_water. For further details see Urmy et. al (2012) doi:10.1093/icesjms/fsr205.

Proposer: Aurore Biardeau

Proposed Date: 22 Aug 2024

Comments: #212

CF mailing list link: Standard names: *Micronekton*

Units: g m-2 (UGMS)

New Term

Proposer: Aurore Biardeau

Proposed Date: 22 Aug 2024

Comments: #212

CF mailing list link: Standard names: *Micronekton*

Units: g m-2 (UGMS)

New Term

Proposer: Aurore Biardeau

Proposed Date: 22 Aug 2024

Comments: #212

CF mailing list link: Standard names: *Micronekton*

Units: g m-2 (UGMS)

New Term

Proposer: Aurore Biardeau

Proposed Date: 22 Aug 2024

Comments: #212

CF mailing list link: Standard names: *Micronekton*

Units: g m-2 (UGMS)

New Term

Proposer: Aurore Biardeau

Proposed Date: 22 Aug 2024

Comments: #212

CF mailing list link: Standard names: *Micronekton*

Units: g m-2 (UGMS)

New Term

Proposer: Aurore Biardeau

Proposed Date: 22 Aug 2024

Comments: #212

CF mailing list link: Standard names: *Micronekton*

Units: g m-2 (UGMS)

New Term

Proposer: Yue Li

Proposed Date: 20 Aug 2024

Comments: #211

CF mailing list link: Standard names: Propose new additions to the standard names table (Soil Moisture at different depths)

Units: kg m-2 (KMP2)

New Term

Mean soil water content at a depth of 10 cm.

Proposer: Yue Li

Proposed Date: 20 Aug 2024

Comments: #211

CF mailing list link: Standard names: Propose new additions to the standard names table (Soil Moisture at different depths)

Units: kg m-2 (KMP2)

New Term

Mean soil water content at the depth of 50 cm.

Proposer: Yue Li

Proposed Date: 20 Aug 2024

Comments: #211

CF mailing list link: Standard names: Propose new additions to the standard names table (Soil Moisture at different depths)

Units: kg m-2 (KMP2)

New Term

Mean soil water content at the depth of 100 cm.

Proposer: Yue Li

Proposed Date: 20 Aug 2024

Comments: #211

CF mailing list link: Standard names: Propose new additions to the standard names table (Soil Moisture at different depths)

Units: kg m-2 (KMP2)

New Term

Mean soil water content at a depth of 5 cm.

Proposer: Yue Li

Proposed Date: 20 Aug 2024

Comments: #211

CF mailing list link: Standard names: Propose new additions to the standard names table (Soil Moisture at different depths)

Units: kg m-2 (KMP2)

New Term

Mean soil water content at a depth of 20 cm.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

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

New Term

The surface called "surface" means the lower boundary of the atmosphere. "Upward" indicates a vector component which is positive when directed upward (negative downward). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The chemical formula for methane is CH4. The mass is the total mass of the molecules. The phrase "tendency_of_X" means derivative of X with respect to time. 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. "Emission" means emission from a primary source located anywhere within the atmosphere, including at the lower boundary (i.e. the surface of the earth). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: mol m-3 s-1 (MM3S)

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". "tendency_of_X" means derivative of X with respect to time. 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. "Chemical production" means the result of all chemical reactions within the medium (here, atmosphere) that produce a certain amount of a particular species from the medium. The chemical formula for hydroxyl is OH. The chemical formula for atomic_singlet_oxygen is O1D. The chemical formula for water vapor is H2O. Here, the production of hydroxyl radical is equal to 2k[O1D][H2O], i.e., 2 hydroxyl radicals are formed from the reaction of O1D with H2O. For models that do not have O1D as a species, the production of hydroxyl radical may be represented differently but the chemical production should take account of the hydroxyl yield.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: m-3 (PCUM)

New Term

"Number concentration" means the number of particles or other specified objects per unit volume. The cloud condensation nuclei number concentration is the total number of aerosol particles per unit volume independent of and integrated over particle size that act as condensation nuclei for liquid-phase clouds. A coordinate variable with the standard name of relative_humidity should be specified to indicate that the property refers to a specific supersaturation of 1 percent with respect to liquid water. The ability of a particle to act as a condensation nucleus is determined by its size, chemical composition, and morphology.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: m-3 (PCUM)

New Term

"Number concentration" means the number of particles or other specified objects per unit volume. The cloud condensation nuclei number concentration is the total number of aerosol particles per unit volume independent of and integrated over particle size that act as condensation nuclei for liquid-phase clouds. A coordinate variable with the standard name of relative_humidity should be specified to indicate that the property refers to a specific supersaturation of 0.2 percent with respect to liquid water. The ability of a particle to act as a condensation nucleus is determined by its size, chemical composition, and morphology.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: mol m-3 s-1 (MM3S)

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". "tendency_of_X" means derivative of X with respect to time. 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. "Chemical Destruction" refers to all chemical reactions within the medium (here, atmosphere) that destroys a certain amount of a particular species from the medium.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: mol m-3 s-1 (MM3S)

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". "tendency_of_X" means derivative of X with respect to time. 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. "Chemical Production" refers to all chemical reactions within the medium (here, atmosphere) that produce a certain amount of a particular species from the medium. The chemical formula for molecular hydrogen is H2.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

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

New Term

The surface called "surface" means the lower boundary of the atmosphere. "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. The chemical formula for methane is CH4. The mass is the total mass of the molecules. 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.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: mol m-3 s-1 (MM3S)

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". "tendency_of_X" means derivative of X with respect to time. 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. "Net Chemical production" means the result of "Chemical Production" minus "Chemical Destruction". "Chemical Production" refers to all chemical reactions within the medium (here, atmosphere) that produce a certain amount of a particular species from the medium. "Chemical Destruction" is the result of all chemical reactions within the medium (here, atmosphere) that destroy a certain amount of a particular species. The chemical formula for ozone is O3. The IUPAC name for ozone is trioxygen.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: 1 (UUUU)

New Term

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.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

Units: mol m-3 s-1 (MM3S)

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". "tendency_of_X" means derivative of X with respect to time. 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. "Chemical destruction" means the result of all chemical reactions within the medium (here, atmosphere) that destroy a certain amount of a particular species from the medium. The chemical formula for methane is CH4. The chemical formula for hydroxyl is OH.

Proposer: Fiona O'Connor

Proposed Date: 29 Aug 2024

Comments: #214

CF mailing list link: Standard names: Propose new names for trace gases and aerosols for use in AerChemMIP2 and CMIP7

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

New Term

"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 mass is the total mass of the particles. "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 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. "Net chemical production" means the net result of all chemical reactions within the atmosphere that produce or destroy a particular species. "tendency_of_X" means derivative of X with respect to time. The chemical formula for the ammonium cation is NH4+.

Proposer: Karl E. Taylor

Proposed Date: 26 Sep 2022

Comments: #30

CF mailing list link: use of "specific" in standard names

Units: m s-1 (UVAA)

"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. "Surface mass balance" means the net rate at which ice is added at the land ice surface due to all processes of surface accumulation and ablation. A negative value means loss of ice.

Proposer: Karl E. Taylor

Proposed Date: 26 Sep 2022

Comments: #30

CF mailing list link: use of "specific" in standard names

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

"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Mass balance flux" means the net rate at which ice is added per unit area. A negative value means loss of ice. For an area-average, the cell_methods attribute should be used to specify whether the average is over the area of the whole grid cell or the area of land ice only. "Basal mass balance flux" means the net rate at which ice is added per unit area at the land ice base.

Proposer: Karl E. Taylor

Proposed Date: 26 Sep 2022

Comments: #30

CF mailing list link: use of "specific" in standard names

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

"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Mass balance flux" means the net rate at which ice is added per unit area. A negative value means loss of ice. For an area-average, the cell_methods attribute should be used to specify whether the average is over the area of the whole grid cell or the area of land ice only. "Surface mass balance flux" means the net rate at which ice is added per unit area at the land ice surface due to all processes of surface accumulation and ablation.

Proposer: Karl E. Taylor

Proposed Date: 26 Sep 2022

Comments: #30

CF mailing list link: use of "specific" in standard names

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

"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. "Specific mass flux due to calving" means the change in land ice mass per unit area resulting from iceberg calving. A negative value means loss of ice. For an area-average, the cell_methods attribute should be used to specify whether the average is over the area of the whole grid cell or the area of land ice only. 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.

Proposer: Karl E. Taylor

Proposed Date: 26 Sep 2022

Comments: #30

CF mailing list link: use of "specific" in standard names

Units: m s-1 (UVAA)

"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. "lwe" means liquid water equivalent. "Surface mass balance" means the net rate at which ice is added per unit area at the land ice surface due to all processes of surface accumulation and ablation. A negative value means loss of ice.

Proposer: Karl E. Taylor

Proposed Date: 26 Sep 2022

Comments: #30

CF mailing list link: use of "specific" in standard names

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

"Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Specific mass flux due to calving and ice front melting" means the change in land ice mass per unit area resulting from iceberg calving and melting on the vertical ice front. A negative value means loss of ice. For an area-average, the cell_methods attribute should be used to specify whether the average is over the area of the whole grid cell or the area of land ice only. 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.

Proposer: Karl E. Taylor

Proposed Date: 26 Sep 2022

Comments: #30

CF mailing list link: use of "specific" in standard names

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

"Amount" means mass per unit area. Zero change in land ice amount is an arbitrary level. "Land ice" means glaciers, ice-caps and ice-sheets resting on bedrock and also includes ice-shelves. "tendency_of_X" means derivative of X with respect to time.

Proposer: Aurore Biardeau

Proposed Date: 13 May 2024

Comments: #39

CF mailing list link: Standard names: *Friction Velocity in Sea Water*

Units: m s-1 (UVAA)

New Term

A velocity is a vector quantity. "Northward" indicates a vector component which is positive when directed northward (negative southward). Friction velocity is a reference ocean velocity derived from the relationship between ocean density and downward stress and is usually applied at a level close to the surface where stress is assumed to be independent of height and approximately proportional to the square of mean velocity.

Proposer: Simon Peatman

Proposed Date: 9 Dec 2022

Comments: #32

CF mailing list link: Standard names: Virtual potential temperature

Units: K (UPKA)

The virtual temperature of air is the temperature at which the dry air constituent of a parcel of moist air would have the same density as the moist air at the same pressure. 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).

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)

Global average thermosteric sea level change is the part caused by change in density due to change in temperature i.e. thermal expansion. This in turn results in a change in volume of the world ocean. 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.

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)

Global average steric sea level change is caused by changes in sea water density due to changes in temperature (thermosteric) and salinity (halosteric). This in turn results in a change in volume of the world ocean. 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.

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)

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.

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)

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.

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)

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.

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)

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.

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)

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.

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)

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.

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)

New Term

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)

New Term

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)

New Term

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)

New Term

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)

New Term

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)

New Term

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)

New Term

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)

New Term

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)

New Term

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)

New Term

Proposer: Aurore Biardeau

Proposed Date: 13 May 2024

Comments: #317

CF mailing list link: Standard names: *Energy Flux into Ocean*

Units: W m-2 (UFAA)

New Term

Proposer: Aurore Biardeau

Proposed Date: 13 May 2024

Comments: #319

CF mailing list link: Standard names: *Friction Velocity in Sea Water*

Units: m s-1 (UVAA)

New Term

A velocity is a vector quantity. "Eastward" indicates a vector component which is positive when directed eastward (negative westward). Friction velocity is a reference ocean velocity derived from the relationship between ocean density and downward stress and is usually applied at a level close to the surface where stress is assumed to be independent of height and approximately proportional to the square of mean velocity.

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.

Proposer: Aurore Biardeau

Proposed Date: 5 Mar 2024

Comments: 284

CF mailing list link: Standard names: Saturation state for surface sea water with respect to aragonite/calcite

Units: (UUUU)

New Term

Proposer: Yuling Wu

Proposed Date: 6 Aug 2020

Comments:

CF mailing list link: Standard name: AMSR products

Units: m s-1 (UVAA)

New Term

"Frozen Precipitation" in the earth's atmosphere means precipitation of water in frozen phase only. The abbreviation "lwe" means liquid water equivalent.

Proposer: Yuling Wu

Proposed Date: 6 Aug 2020

Comments:

CF mailing list link: Standard name: AMSR products

Units: m (ULAA)

New Term

"Vegetation roughness" in fluid dynamics means the surface roughness caused by vegetation in impeding the flow.

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 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.

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).

Proposer: Matthias Schneider

Proposed Date: 27 Jan 2024

Comments: #199

CF mailing list link: Standard names: *averaging kernels for mole fraction profiles of atmospheric trace gases*

Units:

New Term

Atmospheric pressures representing the true atmospheric state (analogous to the pressures representing the measured or modelled atmosphere).

Proposer: Matthias Schneider

Proposed Date: 9 Jan 2024

Comments: #199

CF mailing list link: Standard names: *averaging kernels for mole fraction profiles of atmospheric trace gases*

Units:

New Term

Atmospheric altitudes representing the true atmospheric state (analogous to the altitudes representing the measured or modelled atmosphere).

Proposer: Matthias Schneider

Proposed Date: 9 Jan 2024

Comments: #199

CF mailing list link: Standard names: *averaging kernels for mole fraction profiles of atmospheric trace gases*

Units:

New Term

Modes representing different patterns (e.g. vertically correlated atmospheric patterns). Ordering is from most important modes to less important modes.

Proposer: Simon Peatman

Proposed Date: 9 Dec 2022

Comments: #32

CF mailing list link: Standard names: Virtual potential temperature

Units: K (UPKA)

New Term

The virtual potential temperature of air is the potential temperature at which the dry air constituent of a parcel of moist air would have the same density as the moist air at the same pressure. 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).

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.

Proposer: Bjorn Stevens

Proposed Date: 30 Jul 2023

Comments:

CF mailing list link: No term for mass fraction of solid water in the atmosphere (not that I found anyway)

Units: 1 (UUUU)

New Term

The phrase "frozen_water" means ice. "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 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".

Proposer: Aurore Biardeau

Proposed Date: 15 Jun 2023

Comments: #248

CF mailing list link: Standard names: *Sea Ice Ridge Ratio*

Units: 1 (UUUU)

New Term

Proposer: Klaus Zimmermann

Proposed Date: 22 Sep 2021

Comments:

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

Units: 1 (UUUU)

New Term

A probability percentile.

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.

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.

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.

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.

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.

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.

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.

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.

Proposer: Katrine Husum

Proposed Date: 4 Apr 2022

Comments:

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

Units: s (UTBB)

New Term

"sediment_age" means the length of time elapsed since the sediment was deposited. "before_1950" is a transparent representation of the phrase "before_present" used in the geological and archaeological domains to refer to time elapsed between an event and 1950 AD. "sea_floor_sediment" is sediment deposited at the sea bed.

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.

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.

Proposer: Yuling Wu

Proposed Date: 6 Aug 2020

Comments:

CF mailing list link: Standard name: AMSR products

Units: kg m-2 (KMP2)

New Term

"Content" indicates a quantity per unit area. The mass is the total mass of the molecules. 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. "Rain" means drops of water falling through the atmosphere that have a diameter greater than 0.5 mm.

Proposer: Beate Geyer

Proposed Date: 18 Jun 2021

Comments: #15

CF mailing list link: Standard names: Additional evapotranspiration names

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.

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.

Proposer: Beate Geyer

Proposed Date: 18 Jun 2021

Comments: #15

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.

Proposer: Martin Juckes

Proposed Date: 13 May 2020

Comments:

CF mailing list link: Standard names: downward_heat_flux_at_ground_level_in_snow -- clarification

Units: W m-2 (UFAA)

"snow_base" means the bottom of a layer of snow which is lying on rock, soil or ice. "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.

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”).

Proposer: Yannick Kern & Colin Stedmon

Proposed Date: 17 Mar 2023

Comments:

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

Units: m-1 (UPRM)

New Term

A measure of the dependency of the volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter on wavelength. The wavelength range it has been calculated over is stated as an radiation_wavelength attribute (e.g. “275-295 nm”).

Proposer: Dikra Khedhaouiria

Proposed Date: 6 Oct 2021

Comments: Github #134 1.

CF mailing list link: Standard names: river discharge and storage

Units: m3 (MCUB)

New Term

The river_channel represents a body of water flowing along a natural channel and storage refers to the amount of water stored in that channel. The quantity includes unsalted liquid water.

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.

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" 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". “Phycoerythrin-5” is the concentration of phycoerythrin in the 10-5 µm fractions per unit volume of the water body.

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

"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". “Phycoerythrin-4” is the concentration of phycoerythrin in the 5-0.4 µm fractions per unit volume of the water body.

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

Proposed Date: 19 Oct 2021

Comments: Github #135 9.

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" 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". “Phycoerythrin-10” is the concentration of phycoerythrin >10 µm fractions per unit volume of the water body.

Proposer: Emily Schlie, Eric Engle, and the CAMPS team (NOAA MDL)

Proposed Date: 22 Dec 2020

Comments:

CF mailing list link: Standard names: **

Units: m s-1 (UVAA)

New Term

The northward component of storm_motion. "Northward" indicates a vector component which is positive when directed northward (negative southward). Storm_motion is defined as the average speed of a storm and the direction the storm will move from.

Proposer: Emily Schlie, Eric Engle, and the CAMPS team

Proposed Date: 22 Dec 2020

Comments:

CF mailing list link: Standard names: **

Units: m s-1 (UVAA)

New Term

The eastward component of storm motion. “Eastward” indicates a vector component which is positive when directed eastward (negative westward). Storm motion is defined as the average speed of a storm and the direction the storm will move from.

Proposer: Ronny Petrik and Klaus Keuler and Burkhardt Rockel

Proposed Date: 20 May 2021

Comments:

CF mailing list link: Standard names: Residuum of soil water content

Units: kg m-2 (KMP2)

New Term

"Water" means water in all phases. "Content" indicates a quantity per unit area. The mass content of water in soil refers to the vertical integral from the surface down to those layer of the soil model which is the lowermost hydrological active layer. For the content between specified levels in the soil, standard names including "content_of_soil_layer" are used. "Residuum" is defined by the difference between the tendency of the soil moisture content over a specific time period (left hand side of soil water equation) and the sum of the sources and sinks of soil water over the same time period (right hand side of equation). A positive value means that the soil becomes falsely wetter in a model and a negative value means the soil becomes falsely dryer. It should be noted, that the residuum has to be calculated excluding climatological layers where the temperature or the soil water content is kept to a climatological value or a value given by another soil layer.

Proposer: Andy Saulter

Proposed Date: 21 Dec 2020

Comments:

CF mailing list link: Standard names: wave model ancillary forcing parameters

Units: 1 (UUUU)

New Term

The attenuation coefficient is the fractional reduction of sea_surface_wave_variance_spectral_density due to the stated process. Attenuation is the sum of absorption and scattering.

Proposer:

Proposed Date: None

Comments:

CF mailing list link:

Units: K (UPKA)

Updated term description

The term "anomaly" means difference from climatology. Sea water temperature is the in situ temperature of the sea water. To specify the depth at which the temperature anomaly applies, use a vertical coordinate variable or scalar coordinate variable. To specify the reference (baseline) epoch to which the quantity applies, provide a scalar coordinate variable with standard name reference_epoch.

Proposer: Yuling Wu

Proposed Date: 6 Aug 2020

Comments:

CF mailing list link: New standard names for AMSR products

Units: m (ULAA)

New Term

"Vegetation roughness" in fluid dynamics means the surface roughness caused by vegetation in impeding the flow.

Proposer: Yuling Wu

Proposed Date: 6 Aug 2020

Comments:

CF mailing list link: New standard names for AMSR products

Units: m s-1 (UVAA)

New Term

"Frozen Precipitation" in the earth's atmosphere means precipitation of water in frozen phase only. The abbreviation "lwe" means liquid water equivalent.

Proposer: Beate Geyer and Burkhardt Rockel

Proposed Date: 21 Aug 2020

Comments:

CF mailing list link: Standard names: lake variables

Units: degree (UAAA)

New Term

Lake water temperature is the in situ temperature of the lake water. To specify the depth at which the temperature applies use a vertical coordinate variable or scalar coordinate variable.

Proposer: Beate Geyer and Burkhardt Rockel

Proposed Date: 21 Aug 2020

Comments:

CF mailing list link: Standard names: lake variables

Units: m (ULAA)

New Term

The lake mixed layer is the upper part of the ocean, regarded as being well-mixed. Various criteria are used to define the mixed layer; this can be specified by using a standard name of lake_mixed_layer_defined_by_X. "Thickness" means the vertical extent of a layer.

Proposer: Beate Geyer and Burkhardt Rockel

Proposed Date: 21 Aug 2020

Comments:

CF mailing list link: Standard names: lake variables

Units: m (ULAA)

New Term

The lake_floor_depth_below_lake_surface is the vertical distance between the lake surface and the lake bed as measured at a given point in space.

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)

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.

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)

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.

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)

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.

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)

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.

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)

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.

Proposer: Martin Juckes / Alison Pamment

Proposed Date: 4 Jul 2018

Comments: Arising from LS3MIP discussion.

CF mailing list link: Final 17 terms for CMIP6 LS3MIP: Heat flux into snowpack

Units: W m-2 (UFAA)

"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.

Proposer: Martin Juckes / Alison Pamment

Proposed Date: 4 Jul 2018

Comments: Arising from LS3MIP discussion.

CF mailing list link: Final 17 terms for CMIP6 LS3MIP: Heat flux into snowpack

Units: W s m-2 (WSMM)

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.

Proposer: Martin Juckes / Alison Pamment

Proposed Date: 4 Jul 2018

Comments: Arising from LS3MIP discussion.

CF mailing list link: Final 17 terms for CMIP6 LS3MIP: Heat flux into snowpack

Units: W m-2 (UFAA)

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.

Proposer: Martin Juckes / Alison Pamment

Proposed Date: 4 Jul 2018

Comments: Arising from LS3MIP discussion.

CF mailing list link: Final 17 terms for CMIP6 LS3MIP: Heat flux into snowpack

Units: W m-2 (UFAA)

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.

Proposer: Martin Juckes

Proposed Date: 3 Apr 2018

Comments: CMIP6 - PMIP. 12.

CF mailing list link: PMIP Standard names: isotopic fluxes, mass contents and ratios.

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.

Proposer: Maarten Sneep

Proposed Date: 23 Feb 2018

Comments:

CF mailing list link: Standard name proposal related to methane, water vapor, carbon monoxide, semi-heavy water, and nitrogen dioxide.

Units: mol m-2 (MLM2)

New Term

"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.

Proposer: Daniel Neumann

Proposed Date: 18 May 2017

Comments:

CF mailing list link: New standard names for atmospheric sea salt and for nitrogen deposition

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-.

Proposer: Daniel Neumann

Proposed Date: 18 May 2017

Comments:

CF mailing list link: New standard names for atmospheric sea salt and for nitrogen deposition

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-.

Proposer: Bruce Hackett

Proposed Date: 19 Jan 2016

Comments:

CF mailing list link: standard_names for wind stress curl, wind stress divergence

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.

Proposer: Bruce Hackett

Proposed Date: 19 Jan 2016

Comments:

CF mailing list link: standard_names for wind stress curl, wind stress divergence

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.