149 proposals match your search
downwelling_longwave_flux_in_air_assuming_reference_mole_fraction_of_ozone_in_air W m-2 [UFAA] P07 id: HGD54XDY Downwelling radiation is radiation from above. It does not mean "net downward". The sign convention is that "upwelling" is positive upwards and "downwelling" is positive downwards. The term "longwave" means longwave radiation. When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. A phrase assuming_condition indicates that the named quantity is the value which would obtain if all aspects of the system were unaltered except for the assumption of the circumstances specified by the condition. This 3D ozone field acts as a reference ozone field in a diagnostic call to the model's radiation scheme. It is expressed in terms of mole fraction of ozone in air. It may be observation-based or model-derived. It may be from any time period. By using the same ozone reference in the diagnostic radiation call in two model simulations and calculating differences between the radiative flux diagnostics from the prognostic call to the radiation scheme and the diagnostic call to the radiation scheme with the ozone reference, an instantaneous radiative forcing for ozone can be calculated.
Updated term description
reference_mole_fraction_of_ozone_in_air mol mol-1 [MPMX] P07 id: HR5LDNVI This ozone field acts as a reference ozone field in a diagnostic call to the model's radiation scheme. Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y.
Updated term description
projection_x_angular_coordinate rad [URAD] P07 id: QU34OXEG "x" indicates a vector component along the grid x-axis, when this is not true longitude, positive with increasing x. Angular projection coordinates are angular distances in the x- and y-directions on a plane onto which the surface of the Earth has been projected according to a map projection. The relationship between the angular projection coordinates and latitude and longitude is described by the grid_mapping.
Updated term description
projection_y_angular_coordinate rad [URAD] P07 id: 9GAS2Y0C "y" indicates a vector component along the grid y-axis, when this is not true latitude, positive with increasing y. Angular projection coordinates are angular distances in the x- and y-directions on a plane onto which the surface of the Earth has been projected according to a map projection. The relationship between the angular projection coordinates and latitude and longitude is described by the grid_mapping.
Updated term description
integral_wrt_depth_of_sea_water_conservative_temperature_expressed_as_heat_content J m-2 [JMSQ]
New Term
integral_wrt_depth_of_sea_water_preformed_salinity_expressed_as_salt_content kg m-2 [KMP2]
New Term
integral_wrt_depth_of_sea_water_practical_salinity_expressed_as_salt_content kg m-2 [KMP2]
New Term
integral_wrt_depth_of_sea_water_absolute_salinity_expressed_as_salt_content kg m-2 [KMP2]
New Term
tendency_of_atmosphere_mole_concentration_of_molecular_hydrogen_due_to_chemical_destruction mol m-3 s-1 [MM3S] P07 id: RU0W7DC0 "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 "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 remove a certain amount of a particular species from the medium.
Updated term description
Alison Pamment
Comments: Add missing quotation marks at start of description.
surface_net_upward_mass_flux_of_methane_due_to_emission_from_freshwater_lakes kg m-2 s-1 [KSP2] P07 id: 2PYOYCP5 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 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. the surface of the earth). "Emission" is a process entirely distinct from "re-emission" which is used in some standard names. The chemical formula for methane is CH4.
Updated term description
Alison Pamment
Comments: Remove superfluous "tendency" sentence from description
surface_downwelling_shortwave_flux_in_air_assuming_clear_sky_and_reference_mole_fraction_of_ozone_in_air W m-2 [UFAA] P07 id: C6SUZEZJ The surface called "surface" means the lower boundary of the atmosphere. Downwelling radiation is radiation from above. It does not mean "net downward". The sign convention is that "upwelling" is positive upwards and "downwelling" is positive downwards. The term "shortwave" means shortwave radiation. When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. A phrase assuming_condition indicates that the named quantity is the value which would obtain if all aspects of the system were unaltered except for the assumption of the circumstances specified by the condition. "Clear sky" means in the absence of clouds. This 3D ozone field acts as a reference ozone field in a diagnostic call to the model's radiation scheme. It is expressed in terms of mole fraction of ozone in air. It may be observation-based or model-derived. It may be from any time period. By using the same ozone reference in the diagnostic radiation call in two model simulations and calculating differences between the radiative flux diagnostics from the prognostic call to the radiation scheme and the diagnostic call to the radiation scheme with the ozone reference, an instantaneous radiative forcing for ozone can be calculated.
Updated term description
Alison Pamment
Comments: Update description to explain "shortwave" instead of "longwave".
surface_snow_mass kg [KGXX] P07 id: D5YTQY3B Surface snow 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.
Updated term description
Alison Pamment
Comments: Remove superfluous word "amount" from description of surface snow.
tendency_of_atmosphere_mole_concentration_of_molecular_hydrogen_due_to_chemical_destruction mol m-3 s-1 [MM3S] P07 id: RU0W7DC0 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 "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 remove a certain amount of a particular species from the medium. The chemical formula for molecular hydrogen is H2.
Updated term description
Alison Pamment
Comments: Add stock sentence about H2 to end of description
ocean_freshwater_transport_across_line kg s-1 [KGPS] Ocean transport means transport by all processes, both sea water and sea ice. Transport "across_line" means that which crosses a particular line on the Earth's surface; formally this means the integral along the line of the normal component of the transport.
New Term
ocean_salt_transport_across_line kg s-1 [KGPS] "Ocean salt transport" refers to the mass of salt being transported by the ocean by all processes. Transport "across_line" means that which crosses a particular line on the Earth's surface; formally this means the integral along the line of the normal component of the transport.
New Term
sea_bed_downward_stress_due_to_dissipation_of_sea_surface_waves N m-2 [UNSM] Ocean processes such as waves and currents can generate forces (or stress) on the sea bed. The surface called "sea bed" means the lower boundary of the ocean. "Stress" means the shear stress (force per unit area) exerted at the sea bed. A downward stress is a downward flux of momentum. "Downward" indicates a vector component which is positive when directed downward (as the water is acting on the sea bed). The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The phrase "dissipation_of_sea_surface_waves" means the stress associated with sea surface waves dissipation processes through bottom friction.
New Term
sea_bed_downward_stress N m-2 [UNSM] Ocean processes such as waves and currents can generate forces (or stress) on the sea bed. The surface called "sea bed" means the lower boundary of the ocean. "Stress" means the shear stress (force per unit area) exerted at the sea bed. A downward stress is a downward flux of momentum. "Downward" indicates a vector component which is positive when directed downward (as the water is acting on the sea bed).
New Term
sea_bed_downward_stress_due_to_dissipation_of_ocean_current N m-2 [UNSM] Ocean processes such as waves and currents can generate forces (or stress) on the sea bed. The surface called "sea bed" means the lower boundary of the ocean. "Stress" means the shear stress (force per unit area) exerted at the sea bed. A downward stress is a downward flux of momentum. "Downward" indicates a vector component which is positive when directed downward (as the water is acting on the sea bed). The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The phrase "dissipation_of_ocean_current" means the stress associated with ocean current dissipation processes through bottom friction.
New Term
Isotope_ratio_of_2H_to_1H_in_sea_water_excluding_solutes_and_solids 1 [uuuu] 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 only to the chemical compound water and does not include material that may be dissolved or suspended in the aqueous medium.
New Term
surface_upwelling_longwave_flux_in_air_assuming_clear_sky_and_no_aerosol W m-2 [UFAA] The surface called "surface" means the lower boundary of the atmosphere. The term "longwave" means longwave radiation. Upwelling radiation is radiation from below. It does not mean "net upward". The sign convention is that "upwelling" is positive upwards and "downwelling" is positive downwards. When thought of as being incident on a surface, a radiative flux is sometimes called "irradiance". In addition, it is identical with the quantity measured by a cosine-collector light-meter and sometimes called "vector irradiance". In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. A phrase assuming_condition indicates that the named quantity is the value which would obtain if all aspects of the system were unaltered except for the assumption of the circumstances specified by the condition. "Clear sky" means in the absence of clouds.
New Term
ocean_heat_transport_across_line W [WATT] "Ocean heat transport" means total heat transport by the ocean by all processes. Transport "across_line" means that which crosses a particular line on the Earth's surface; formally this means the integral along the line of the normal component of the transport.
New Term
carbon_mass_content_of_geological_storage kg m-2 [KMP2] Carbon mass per unit area that has been removed from the environment and stored in geological reservoirs, carbon dioxide removal processes.
New Term
mass_flux_of_carbon_from_biomass_into_geological_storage kg m-2 s-1 [KSP2] Flux of carbon from biomass that is intentionally stored in long-term geological reservoirs as a carbon dioxide removal process. This is most closely related to the variable mass_flux_of_carbon_into_forestry_and_agricultural_products_due_to_crop_harvesting, which represents the flux to product pools. For the purpose of simulations that include intentional carbon dioxide removal from biomass (e.g., biomass energy with carbon capture and storage (BECCS)), it is necessary to be able to separate the fluxes to indefinitely long-term (i.e., geologic storage) pools from shorter- and medium-term cycling product pools.
New Term
modis_cloud_area_fraction 1 [UUUU] P07 id: 3N2L16JR The MODIS cloud area fraction is diagnosed from atmosphere model output by the MODIS simulator software in such a way as to be comparable with the observational diagnostics of MODIS (Moderate Resolution Imaging Spectroradiometer). Cloud area fraction is also called “cloud amount” and “cloud cover.” As seen from above, mean fraction of grid column occupied by cloud of optical depths and heights specified by the tau and pressure intervals given above. Dimensions of the histogram are cloud top pressure and cloud optical depth. To distinguish that these are cloud area fractions as seen by a specific satellite instrument simulator, not the same as cloud area fractions diagnosed by the native model, the prefix format of satellite name_ is employed. "Area fraction" is the fraction of a grid cell's horizontal area that has some characteristic of interest. It is evaluated as the area of interest divided by the grid cell area, or if the cell_methods restricts the evaluation to some portion of that grid cell (e.g. "where sea_ice"), then it is the area of interest divided by the area of the identified portion.
Updated term description
modis_liquid_topped_cloud_area_fraction 1 [UUUU] P07 id: I49JSQC6 Liquid means liquid-topped clouds, as seen by the MODIS simulator. To distinguish that these are cloud area fractions as seen by a specific satellite instrument simulator, not the same as cloud area fractions diagnosed by the native model, the prefix format of satellite name_ is employed. "Area fraction" is the fraction of a grid cell's horizontal area that has some characteristic of interest. It is evaluated as the area of interest divided by the grid cell area, or if the cell_methods restricts the evaluation to some portion of that grid cell (e.g. "where sea_ice"), then it is the area of interest divided by the area of the identified portion.
Updated term description
modis_ice_topped_cloud_area_fraction 1 [UUUU] P07 id: OKOVAI5O Ice means ice-topped clouds, as seen by the MODIS simulator. To distinguish that these are cloud area fractions as seen by a specific satellite instrument simulator, not the same as cloud area fractions diagnosed by the native model, the prefix format of satellite name_ is employed. "Area fraction" is the fraction of a grid cell's horizontal area that has some characteristic of interest. It is evaluated as the area of interest divided by the grid cell area, or if the cell_methods restricts the evaluation to some portion of that grid cell (e.g. "where sea_ice"), then it is the area of interest divided by the area of the identified portion.
Updated term description
misr_cloud_area_fraction 1 Cloud area fraction is also called "cloud amount" and "cloud cover". The cloud area fraction is for the whole atmosphere column, as seen from the surface or the top of the atmosphere. For the cloud area fraction between specified levels in the atmosphere, standard names including "cloud_area_fraction_in_atmosphere_layer" are used. Standard names also exist for high, medium and low cloud types. "Area fraction" is the fraction of a grid cell's horizontal area that has some characteristic of interest. It is evaluated as the area of interest divided by the grid cell area, or if the cell_methods restricts the evaluation to some portion of that grid cell (e.g. "where sea_ice"), then it is the area of interest divided by the area of the identified portion. It may be expressed as a fraction, a percentage, or any other dimensionless representation of a fraction.
New Term
mole_concentration_of_particulate_organic_matter_expressed_as_carbon_in_sea_water mol m-3 [MLM3] 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.
New Term
ocean_surface_wave_peak_period s [UTBB] Wind driven surface gravity waves at the ocean surface, generated by the wave model, spectral peak period
New Term
ocean_surface_significant_wave_height m [ULAA] Wind driven surface gravity waves at the ocean surface, generated by the wave model , wave Height
New Term
ocean_surface_wave_direction_sea degrees [UAAA] Wind driven surface gravity waves at the ocean surface, generated by the wave model, sea mean wave direction
New Term
ocean_surface_wave_direction degrees [UAAA] Wind driven surface gravity waves at the ocean surface, generated by the wave model, mean wave direction
New Term
ocean_surface_wave_peak_period_sea s [UTBB] Wind driven surface gravity waves at the ocean surface, generated by the wave model, sea spectral peak period
New Term
ocean_surface_wave_mean_period_sea s [UTBB] Wind driven surface gravity waves at the ocean surface, generated by the wave model, sea mean period
New Term
ocean_surface_significant_wave_height_sea m [ULAA] Wind driven surface gravity waves at the ocean surface, generated by the wave model , sea wave height
New Term
ocean_surface_wave_direction_swell degrees [UAAA] Wind driven surface gravity waves at the ocean surface, generated by the wave model, swell mean wave direction
New Term
ocean_surface_wave_mean_period_swell s [UTBB] Wind driven surface gravity waves at the ocean surface, generated by the wave model, swell mean period
New Term
ocean_surface_significant_wave_height_swell m [ULAA] Wind driven surface gravity waves at the ocean surface, generated by the wave model , swell wave height
New Term
ocean_surface_wave_mean_period s [UTBB] Wind driven surface gravity waves at the ocean surface, generated by the wave model, mean period
New Term
ocean_surface_wave_peak_period_swell s [UTBB] Wind driven surface gravity waves at the ocean surface, generated by the wave model, swell spectral peak period
New Term
photolysis_rate_of_ozone_to_atomic_singlet_oxygen s-1 [PRSC] "Photolysis" is a chemical reaction in which a chemical compound is broken down by photons. The "reaction rate" is the rate at which the reactants of a chemical reaction form the products. The chemical formula for ozone is O3. The IUPAC name for ozone is trioxygen. The phrase "atomic_singlet_oxygen" means the singlet D state, an excited state, of the oxygen atom. The combined photolysis rate of ozone to both excited and ground state oxygen atoms has the standard name photolysis_rate_of_ozone.
Term change from: photolysis_rate_of_ozone_to_1D_oxygen_atom
photolysis_rate_of_ozone s-1 [PRSC] P07 id: U5OFMC8F "Photolysis" is a chemical reaction in which a chemical compound is broken down by photons. The "reaction rate" is the rate at which the reactants of a chemical reaction form the products. The chemical formula for ozone is O3. The IUPAC name for ozone is trioxygen. The quantity with standard name photolysis_rate_of_ozone is the rate of photolytic loss of ozone, including all possible photolysis channels to form ground state atomic oxygen (O3P ) and excited (singlet D) atomic oxygen (O1D). Photolysis to the excited state only has the standard name photolysis_rate_of_ozone_to_atomic_singlet_oxygen.
Updated term description
upward_northward_momentum_flux_in_air_due_to_orographic_gravity_waves Pa [PASX] "Upward northward" indicates the ZY component of a tensor. Momentum flux is dimensionally equivalent to stress and pressure. It is a tensor quantity. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Upward" indicates a vector component which is positive when directed upward (negative downward). "Northward" indicates a vector component which is positive when directed northward (negative southward). An upward northward momentum flux is an upward flux of northward momentum, which accelerates the upper medium northward and the lower medium southward. 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. "Orographic gravity waves" refer to gravity waves which are generated by flow over orography. 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.
New Term
upward_northward_momentum_flux_in_air_due_to_nonorographic_gravity_waves Pa [PASX] "Upward northward" indicates the ZY component of a tensor. Momentum flux is dimensionally equivalent to stress and pressure. It is a tensor quantity. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Northward" indicates a vector component which is positive when directed northward (negative southward). "Upward" indicates a vector component which is positive when directed upward (negative downward). An upward northward momentum flux is an upward flux of northward momentum, which accelerates the upper medium northward and the lower medium southward. 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. "Nonorographic" gravity waves refer to gravity waves which are not generated by flow over orography. 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 former has the standard name upward_northward_momentum_flux_in_air_due_to_orographic_gravity_waves.
New Term
tendency_of_atmosphere_mass_content_of_elemental_carbon_dry_aerosol_particles_due_to_emission_from_fires kg m-2 s-1 [KSP2] 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 "fires" means all biomass fires, whether naturally occurring or ignited by humans. 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). In measurements of carbonaceous aerosols, elemental carbon samples may also include some inorganic carbon compounds, whose mass is neglected and assumed to be distributed between the elemental and organic carbon components of the aerosol particles. Reference: Petzold, A., Ogren, J. A., Fiebig, M., Laj, P., Li, S.-M., Baltensperger, U., Holzer-Popp, T., Kinne, S., Pappalardo, G., Sugimoto, N., Wehrli, C., Wiedensohler, A., and Zhang, X.-Y.: Recommendations for reporting "black carbon" measurements, Atmos. Chem. Phys., 13, 8365–8379, https://doi.org/10.5194/acp-13-8365-2013, 2013.
New Term
tendency_of_atmosphere_mass_content_of_methane_due_to_emission_from_fires kg m-2 s-1 [KSP2] 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 term "fires" means all biomass fires, whether naturally occurring or ignited by humans. The chemical formula for methane is CH4.
New Term
tendency_of_atmosphere_mass_content_of_particulate_organic_matter_dry_aerosol_particles_due_to_emission_from_fires kg m-2 s-1 [KSP2] 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 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 "fires" means all biomass fires, whether naturally occurring or ignited by humans.
New Term
tendency_of_atmosphere_mass_content_of_ammonia_due_to_emission_from_fires kg m-2 s-1 [KSP2] "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 term "fires" means all biomass fires, whether naturally occurring or ignited by humans. The chemical formula for ammonia is NH3.
New Term
tendency_of_atmosphere_mass_content_of_nmvoc_due_to_emission_from_fires kg m-2 s-1 [KSP2] "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 term "fires" means all biomass fires, whether naturally occurring or ignited by humans. The abbreviation "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.
New Term
tendency_of_atmosphere_mass_content_of_nox_expressed_as_nitrogen_due_to_emission_from_fires kg m-2 s-1 [KSP2] 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 term "fires" means all biomass fires, whether naturally occurring or ignited by humans. "Nox" means nitric oxide (NO) and nitrogen dioxide (NO2).
New Term
tendency_of_atmosphere_mass_content_of_carbon_monoxide_due_to_emission_from_fires kg m-2 s-1 [KSP2] 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 term "fires" means all biomass fires, whether naturally occurring or ignited by humans. The chemical formula for carbon monoxide is CO.
New Term
tendency_of_atmosphere_mass_content_of_sulfur_dioxide_due_to_emission_from_fires kg m-2 s-1 [KSP2] 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 term "fires" means all biomass fires, whether naturally occurring or ignited by humans. The chemical formula for sulfur dioxide is SO2.
New Term
tendency_of_atmosphere_mass_content_of_dimethyl_sulfide_due_to_emission_from_fires kg m-2 s-1 [KSP2] 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 term "fires" means all biomass fires, whether naturally occurring or ignited by humans. The chemical formula for dimethyl sulfide is (CH3)2S. Dimethyl sulfide is sometimes referred to as DMS.
New Term
acoustic_centre_of_mass_in_sea_water m [ULAA] P07 id: PH4D8A5Y 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.
Updated term description
ocean_wet_mass_content_of_migrant_upper_mesopelagic_micronekton g m-2 [UGMS] Component of the micronekton that inhabits the upper mesopelagic layer during daytime and the epipelagic layer during nighttime. "Content" indicates a quantity per unit area. The "ocean content" of a quantity refers to the vertical integral within the specified vertical bounds.
New Term
ocean_wet_mass_content_of_lower_mesopelagic_micronekton g m-2 [UGMS] Component of the micronekton that inhabits permanently the lower mesopelagic layer. "Content" indicates a quantity per unit area. The "ocean content" of a quantity refers to the vertical integral within the specified vertical bounds.
New Term
ocean_wet_mass_content_of_epipelagic_micronekton g m-2 [UGMS] Component of the micronekton that inhabits permanently the epipelagic layer. "Content" indicates a quantity per unit area. The "ocean content" of a quantity refers to the vertical integral within the specified vertical bounds.
New Term
ocean_wet_mass_content_of_highly_migrant_lower_mesopelagic_micronekton g m-2 [UGMS] Component of the micronekton that inhabits the lower mesopelagic layer during daytime and the epipelagic layer during nighttime. "Content" indicates a quantity per unit area. The "ocean content" of a quantity refers to the vertical integral within the specified vertical bounds.
New Term
ocean_wet_mass_content_of_migrant_lower_mesopelagic_micronekton g m-2 [UGMS] Component of the micronekton that inhabits the lower mesopelagic layer during daytime and the upper mesopelagic layer during nighttime. "Content" indicates a quantity per unit area. The "ocean content" of a quantity refers to the vertical integral within the specified vertical bounds.
New Term
ocean_wet_mass_content_of_upper_mesopelagic_micronekton g m-2 [UGMS] Component of the micronekton that inhabits permanently the upper mesopelagic layer. "Content" indicates a quantity per unit area. The "ocean content" of a quantity refers to the vertical integral within the specified vertical bounds.
New Term
land_ice_surface_mass_balance_rate 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.
Term change from: land_ice_surface_specific_mass_balance_rate
land_ice_surface_mass_balance_flux 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.
Term change from: land_ice_surface_specific_mass_balance_flux
land_ice_basal_mass_balance_flux 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.
Term change from: land_ice_basal_specific_mass_balance_flux
tendency_of_land_ice_amount_due_to_calving_and_ice_front_melting 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.
Term change from: land_ice_specific_mass_flux_due_to_calving_and_ice_front_melting
tendency_of_land_ice_amount 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.
Term change from: tendency_of_change_in_land_ice_amount
tendency_of_land_ice_amount_due_to_calving 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.
Term change from: land_ice_specific_mass_flux_due_to_calving
land_ice_lwe_surface_mass_balance_rate 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.
Term change from: land_ice_lwe_surface_specific_mass_balance_rate
air_virtual_temperature 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).
Term change from: virtual_temperature
change_in_sea_surface_height_due_to_change_in_air_pressure_and_wind_at_high_frequency 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.
Term change from: sea_surface_height_correction_due_to_air_pressure_and_wind_at_high_frequency
amplitude_of_global_mean_sea_level_change 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.
Term change from: amplitude_of_global_average_sea_level_change
change_in_sea_surface_height_due_to_change_in_air_pressure_at_low_frequency 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.
Term change from: sea_surface_height_correction_due_to_air_pressure_at_low_frequency
global_mean_sea_level_change 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.
Term change from: global_average_sea_level_change
global_mean_thermosteric_sea_level_change 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.
Term change from: global_average_thermosteric_sea_level_change
global_mean_steric_sea_level_change 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.
Term change from: global_average_steric_sea_level_change
phase_of_global_mean_sea_level_change 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.
Term change from: phase_of_global_average_sea_level_change
rate_of_global_mean_sea_level_change 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.
Term change from: tendency_of_global_average_sea_level_change
change_in_ocean_dynamic_sea_level m [ULAA]
New Term
manometric_change_in_mean_sea_level m [ULAA]
New Term
change_in_mean_sea_level_due_to_change_in_air_pressure m [ULAA]
New Term
change_in_mean_sea_level_wrt_reference_ellipsoid m [ULAA]
New Term
change_in_mean_sea_level_due_to_change_in_geoid_and_solid_earth_deformation m [ULAA]
New Term
sterodynamic_change_in_sea_level m [ULAA]
New Term
change_in_height_of_solid_surface_wrt_reference_ellipsoid m [ULAA]
New Term
manometric_change_in_sea_surface_height m [ULAA]
New Term
change_in_mean_sea_level_due_to_change_in_global_ocean_mass_and_geoid_and_solid_earth_deformation m [ULAA]
New Term
mean_sea_level_height_above_reference_ellipsoid m [ULAA]
New Term
wave_mixing_energy_flux_into_sea_water W m-2 [UFAA]
New Term
magnitude_of_horizontal_gradient_of_mass_concentration_of_chlorophyll_a_in_sea_water kg m-4 '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.
New Term
aragonite_saturation_state_in_sea_water
New Term
lwe_frozen_precipitation_rate m s-1 [UVAA] "Frozen Precipitation" in the earth's atmosphere means precipitation of water in frozen phase only. The abbreviation "lwe" means liquid water equivalent.
New Term
vegetation_roughtness_length m [ULAA] "Vegetation roughness" in fluid dynamics means the surface roughness caused by vegetation in impeding the flow.
New Term
ratio_of_sea_water_potential_temperature_anomaly_to_relaxation_timescale K s-1 [KPRS] P07 id: AD85SZNH 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.
Updated term description
freezing_temperature_of_sea_water K [UPKA] P07 id: CFSN0625 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).
Updated term description
eigenmode Modes representing different patterns (e.g. vertically correlated atmospheric patterns). Ordering is from most important modes to less important modes.
New Term
true_state_altitude Atmospheric altitudes representing the true atmospheric state (analogous to the altitudes representing the measured or modelled atmosphere).
New Term
true_state_pressure Atmospheric pressures representing the true atmospheric state (analogous to the pressures representing the measured or modelled atmosphere).
New Term
air_virtual_potential_temperature K [UPKA] 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).
New Term
water_surface_height_above_reference_datum m [ULAA] P07 id: CF15N1 '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.
Updated term description
mass_fraction_of_frozen_water_in_air 1 [UUUU] 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".
New Term
volume_fraction_of_ridged_ice_in_sea_ice 1 [UUUU]
New Term
cumulative_probability_of_air_temperature 1 [UUUU] A probability percentile.
New Term
number_of_days_with_air_temperature_above_threshold 1 [UUUU] P07 id: CFV13N11 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.
Updated term description
mass_concentration_of_haptophytes_expressed_as_chlorophyll_in_sea_water mg m-3 [UMMC] 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.
New Term
mass_concentration_of_prokaryotes_expressed_as_chlorophyll_in_sea_water mg m-3 [UMMC] 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.
New Term
mass_concentration_of_dinoflagellates_expressed_as_chlorophyll_in_sea_water mg m-3 [UMMC] 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.
New Term
mass_concentration_of_cryptophytes_expressed_as_chlorophyll_in_sea_water mg m-3 [UMMC] 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.
New Term
mass_concentration_of_prochlorococcus_expressed_as_chlorophyll_in_sea_water mg m-3 [UMMC] 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.
New Term
mass_concentration_of_greenalgae_expressed_as_chlorophyll_in_sea_water mg m-3 [UMMC] 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.
New Term
tidal_sea_surface_height_above_reference_datum m [ULAA] "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.
New Term
sea_floor_sediment_age_before_1950 s [UTBB] "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.
New Term
mass_concentration_of_prokaryotes_expressed_as_carbon_in_sea_water Kg m-3 [UKMC] "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.
New Term
mole_concentration_of_prokaryotes_expressed_as_carbon_in_sea_water mol m-3 [MLM3] 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.
New Term
water_evapotranspiration_amount kg m-2 [KMP2] 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.
New Term
water_evapotranspiration_flux kg m-2 s-1 [KSP2] P07 id: OLT1W3WD 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.
Updated term description
downward_heat_flux_at_snow_base_in_snow 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.
Term change from: downward_heat_flux_at_ground_level_in_snow
atmosphere_mass_content_of_rain kg m-2 [KMP2] "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.
New Term
water_potential_evapotranspiration_amount kg m-2 [KMP2] "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.
New Term
concentration_of_colored_dissolved_organic_matter_in_sea_water_expressed_as_fluorescence_in_raman_units nm-1 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”).
New Term
derivative_wrt_wavelength_of_volume_absorption_coefficient_of_radiative_flux_in_sea_water_due_to_dissolved_organic_matter m-1 [UPRM] 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”).
New Term
mass_concentration_of_phycoerythrin_5_in_sea_water kg m-3 [UKMC] "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.
New Term
enrichment_of_15N_in_particulate_nitrogen_in_particles_in_sea_water_expressed_as_lowercase_delta_15N_relative_to_atmospheric_nitrogen 1 [UUUU] 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.
New Term
mass_concentration_of_phycoerythrin_10_in_sea_water kg m-3 [UKMC] "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.
New Term
mass_concentration_of_phycoerythrin_4_in_sea_water kg m-3 [UKMC] "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.
New Term
water_volume_contained_in_river_channel m3 [MCUB] 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.
New Term
northward_storm_velocity m s-1 [UVAA] 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.
New Term
Emily Schlie, Eric Engle, and the CAMPS team (NOAA MDL) (2020-12-22)
Standard names: **
Comments:
eastward_storm_velocity m s-1 [UVAA] 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.
New Term
difference_between_change_in_soil_moisture_content_and_sum_of_estimated_contributions kg m-2 [KMP2] "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.
New Term
sea_surface_wave_variance_spectral_density_attenuation_coefficient_due_to_icebergs 1 [UUUU] 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.
New Term
sea_water_temperature_anomaly K [UPKA] P07 id: 5G0VSG9S 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.
Updated term description
lwe_solid_precipitation_rate m s-1 [UVAA] "Frozen Precipitation" in the earth's atmosphere means precipitation of water in frozen phase only. The abbreviation "lwe" means liquid water equivalent.
New Term
surface_roughness_length_due_to_vegetation m [ULAA] "Vegetation roughness" in fluid dynamics means the surface roughness caused by vegetation in impeding the flow.
New Term
lake_mixed_layer_thickness m [ULAA] 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.
New Term
lake_floor_depth_below_lake_surface m [ULAA] 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.
New Term
lake_water_temperature degree [UAAA] 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.
New Term
surface_longwave_dust_ambient_aerosol_direct_radiative_effect_assuming_clear_sky 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.
Term change from: surface_net_downward_longwave_dust_ambient_aerosol_particles_direct_radiative_effect_assuming_clear_sky
surface_shortwave_dust_ambient_aerosol_direct_radiative_effect 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.
Term change from: surface_net_downward_shortwave_dust_ambient_aerosol_particles_direct_radiative_effect
toa_longwave_dust_ambient_aerosol_direct_radiative_effect_assuming_clear_sky 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.
Term change from: toa_longwave_dust_ambient_aerosol_particles_direct_radiative_effect_assuming_clear_sky
surface_shortwave_dust_ambient_aerosol_direct_radiative_effect_assuming_clear_sky 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.
Term change from: surface_net_downward_shortwave_dust_ambient_aerosol_particles_direct_radiative_effect_assuming_clear_sky
surface_longwave_dust_ambient_aerosol_direct_radiative_effect 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.
Term change from: surface_net_downward_longwave_dust_ambient_aerosol_particles_direct_radiative_effect
integral_wrt_time_of_surface_downward_turbulent_heat_flux 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.
Term change from: integral_wrt_time_of_surface_downward_sensible_heat_flux
surface_upward_turbulent_heat_flux 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.
Term change from: surface_upward_sensible_heat_flux
upward_turbulent_heat_flux_in_air 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.
Term change from: upward_sensible_heat_flux_in_air
surface_downward_turbulent_heat_flux 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.
Term change from: surface_downward_sensible_heat_flux
isotope_ratio_of_2H_to_1H_in_sea_water_excluding_solutes_and_solids 1 [UUUU] 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.
New Term
atmosphere_mole_content_of_semiheavy_water_vapor mol m-2 [MLM2] "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.
New Term
mass_fraction_of_chloride_dry_aerosol_particles_in_air 1 [UUUU] 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-.
New Term
mass_concentration_of_chloride_dry_aerosol_particles_in_air kg m-3 [UKMC] 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-.
New Term
divergence_of_surface_downward_stress N m-3 [NCUM] 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.
New Term
vertical_component_of_curl_of_surface_downward_stress N m-3 [NCUM] 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.
New Term