probability_of_mass_concentration_of_volcanic_ash_in_air_above_threshold 1 [UUUU] "probability_of_X_above_threshold" means the chance that X is above the threshold.
Space and time coordinates must be used to indicate the area and time to which a probability applies. "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". "Volcanic ash" means the fine-grained products of explosive volcanic eruptions, such as minerals or crystals, older fragmented rock (e.g. andesite) and glass. Particles within a volcanic ash cloud have diameters less than 2 mm. "Volcanic ash" does not include non-volcanic dust. It must have a coordinate variable or scalar coordinate variable with the standard name of mass_concentration_of_volcanic_ash_in_air to supply the threshold(s).
change_in_sea_surface_height_due_to_earth_tide m [ULAA] "Sea surface height" is a time-varying quantity. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Tides are a significant contributor to the observed sea surface height; earth tide means the solid earth tide.
change_in_sea_surface_height_due_to_pole_tide m [ULAA] "Sea surface height" is a time-varying quantity. The specification of a physical process by the phrase "due_to_" process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Tides are a significant contributor to the observed sea surface height; the pole tide occurs due to variations in the earth's rotation.
sea_surface_height_amplitude_due_to_geocentric_ocean_tide m [ULAA]P07 id: CFV10N37 "Sea surface height" is a time-varying quantity. Amplitude is the magnitude of a periodic variation modelled by a sinusoidal function. A coordinate variable of harmonic_period should be used to specify the period of the sinusoidal wave. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Tides are a significant contributor to the observed sea surface height; geocentric ocean tide means the sum total of ocean tide and load tide.
sea_surface_height_amplitude_due_to_pole_tide m [ULAA]P07 id: CFV10N39 "Sea surface height" is a time-varying quantity. Amplitude is the magnitude of a periodic variation modelled by a sinusoidal function. A coordinate variable of harmonic_period should be used to specify the period of the sinusoidal wave. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Tides are a significant contributor to the observed sea surface height; the pole tide occurs due to variations in the earth's rotation.
sea_surface_height_amplitude_due_to_non_equilibrium_ocean_tide m [ULAA]P07 id: CFV10N38 "Sea surface height" is a time-varying quantity. Amplitude is the magnitude of a periodic variation modelled by a sinusoidal function. A coordinate variable of harmonic_period should be used to specify the period of the sinusoidal wave. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Tides are a significant contributor to the observed sea surface height; non equilibrium ocean tide refers to the long period ocean tide.
amplitude_of_global_average_sea_level_change m [ULAA]P07 id: ZSDAR2KM 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 periodic variation 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.
sea_surface_height_amplitude_due_to_equilibrium_ocean_tide m [ULAA]P07 id: CFV10N36 "Sea surface height" is a time-varying quantity. Amplitude is the magnitude of a periodic variation modelled by a sinusoidal function. A coordinate variable of harmonic_period should be used to specify the period of the sinusoidal wave. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Tides are a significant contributor to the observed sea surface height; equilibrium ocean tide refers to the long period ocean tide.
sea_surface_height_amplitude_due_to_earth_tide m [ULAA]P07 id: CFV10N35 "Sea surface height" is a time-varying quantity. Amplitude is the magnitude of a periodic variation modelled by a sinusoidal function. A coordinate variable of harmonic_period should be used to specify the period of the sinusoidal wave. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Tides are a significant contributor to the observed sea surface height; earth tide means the solid earth tide.
echo_intensity_test_quality_flag 1 [UUUU] A quality flag that reports the result of the Echo Intensity test, which checks that beams in adjacent bins do not differ by more than an operator-provided amount. The linkage between the data variable and this variable is achieved using the ancillary_variables attribute. There are standard names for other specific quality tests which take the form of X_quality_flag. Quality information that does not match any of the specific quantities should be given the more general standard name of quality_flag.
sea_ice_internal_pressure N m-1 [NTPM] Sea ice internal pressure is the effective pressure associated with the internal stress field of the sea ice cover, representing the instantaneous internal mechanical state of the ice and not its material strength. "Sea ice" means all ice floating in the sea which has formed from freezing sea water, rather than by other processes such as calving of land ice to form icebergs.
sinking_mole_flux_at_sea_floor_of_particulate_organic_nitrogen_in_sea_water mol m-2 s-1 [M2MS]P07 id: F61RU7IS In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. "Particulate organic nitrogen" means the sum of all organic nitrogen compounds, which are solid or which are bound to solid particles. "Organic nitrogen", when measured, always refers to all nitrogen incorporated in carbon compounds in the sample. Models may use the term to refer to nitrogen contained in specific groups of organic compounds in which case the data variable should be accompanied by a complete description of the species represented, for example, by using a comment attribute.
sinking_mole_flux_at_sea_floor_of_particulate_organic_phosphorus_in_sea_water mol m-2 s-1 [M2MS]P07 id: WJTO45T8 In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Particulate organic phosphorus means organic phosphorus that does not pass through a reference filter pore size. "Organic phosphorus" means phosphorus in carbon compounds.
sinking_mole_flux_at_sea_floor_of_particulate_silicon_in_sea_water mol m-2 s-1 [M2MS]P07 id: 2KTWMQUM In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Particulate silicon means the sum of all organic (biogenic) and inorganic silicon that does not pass through a reference filter pore size.
sinking_mole_flux_at_sea_floor_of_particulate_iron_in_sea_water mol m-2 s-1 [M2MS]P07 id: YHX681W6 In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. "Sinking" is the gravitational settling of particulate matter suspended in a liquid. A sinking flux is positive downwards and is calculated relative to the movement of the surrounding fluid. Iron means iron in all chemical forms, commonly referred to as "total iron". Particulate iron means iron which is solid or which is bound to solid particles that does not pass through a reference filter pore size, including insoluble Fe(III).
healpix_index 1 [UUUU] HEALPix (Hierarchical Equal Area isoLatitude Pixelation of a sphere) indices indicate the location of HEALPix cells in latitude and longitude, including their cell bounds. The relationship between HEALPix indices and latitude and longitude is described by the grid_mapping variable with a grid_mapping_name of "healpix", that must be attached to the data variable as described in Chapter 5.6 of the CF Convention. A HEALPix index variable must have an integer data type.
mass_concentration_of_particulate_organic_matter_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. Particulate means suspended solids of all sizes. Particulate organic matter (also called POM) means organic matter that does not pass through a reference filter pore size. "Organic matter" means material which is derived from living organisms or from their biological activities. Organic matter consists of carbon-based compounds.
volume_fraction_of_ridged_ice_in_sea_ice 1 [UUUU] "Volume fraction" is used in the construction "volume_fraction_of_X_in_Y", where X is a material constituent of Y. It is evaluated as the volume of X divided by the volume of Y (including X). It may be expressed as a fraction, a percentage, or any other dimensionless representation of a fraction. Sea ice "ridging" occurs in rough sea conditions. The motion of the sea surface can cause areas of sea ice to deform and fold resulting in ridged upper and lower surfaces. The ridges can be as much as twenty metres thick if thick ice is deformed. "Sea ice" means all ice floating in the sea which has formed from freezing sea water, rather than by other processes such as calving of land ice to form icebergs. This quantity specifically refers to the volume of ice that is ridged or dynamically deformed, divided by the total volume of sea ice that yields the fraction.