| 2352 | | <entry id="sea_surface_foundation_temperature"> |
|---|
| 2353 | | <canonical_units>K</canonical_units> |
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| 2354 | | <description>The surface called "surface" means the lower boundary of the atmosphere. The sea surface foundation temperature is the water temperature that is not influenced by a thermally stratified layer of diurnal temperature variability (either by daytime warming or nocturnal cooling). The foundation temperature is named to indicate that it is the temperature from which the growth of the diurnal thermocline develops each day, noting that on some occasions with a deep mixed layer there is no clear foundation temperature in the surface layer. In general, sea surface foundation temperature will be similar to a night time minimum or pre-dawn value at depths of between approximately 1 and 5 meters. In the absence of any diurnal signal, the foundation temperature is considered equivalent to the quantity with standard name sea_surface_subskin_temperature. The sea surface foundation temperature defines a level in the upper water column that varies in depth, space, and time depending on the local balance between thermal stratification and turbulent energy and is expected to change slowly over the course of a day. If possible, a data variable with the standard name sea_surface_foundation_temperature should be used with a scalar vertical coordinate variable to specify the depth of the foundation level. |
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| 2355 | | |
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| 2356 | | Sea surface foundation temperature is measured at the base of the diurnal thermocline or as close to the water surface as possible in the absence of thermal stratification. Only in situ contact thermometry is able to measure the sea surface foundation temperature. Analysis procedures must be used to estimate sea surface foundation temperature value from radiometric satellite measurements of the quantities with standard names sea_surface_skin_temperature and sea_surface_subskin_temperature. Sea surface foundation temperature provides a connection with the historical concept of a "bulk" sea surface temperature considered representative of the oceanic mixed layer temperature that is typically represented by any sea temperature measurement within the upper ocean over a depth range of 1 to approximately 20 meters. The general term, "bulk" sea surface temperature, has the standard name sea_surface_temperature with no associated vertical coordinate axis. Sea surface foundation temperature provides a more precise, well-defined quantity than "bulk" sea surface temperature and, consequently, is more representative of the mixed layer temperature. The temperature of sea water at a particular depth (other than the foundation level) should be reported using the standard name sea_water_temperature and, wherever possible, supplying a vertical coordinate axis or scalar coordinate variable.</description> |
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| 2357 | | </entry> |
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| 2374 | | </entry> |
|---|
| 2375 | | <entry id="sea_surface_skin_temperature"> |
|---|
| 2376 | | <canonical_units>K</canonical_units> |
|---|
| 2377 | | <description>The surface called "surface" means the lower boundary of the atmosphere. The sea surface skin temperature is the temperature measured by an infrared radiometer typically operating at wavelengths in the range 3.7 - 12 micrometers. It represents the temperature within the conductive diffusion-dominated sub-layer at a depth of approximately 10 - 20 micrometers below the air-sea interface. Measurements of this quantity are subject to a large potential diurnal cycle including cool skin layer effects (especially at night under clear skies and low wind speed conditions) and warm layer effects in the daytime.</description> |
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| 2378 | | </entry> |
|---|
| 2379 | | <entry id="sea_surface_subskin_temperature"> |
|---|
| 2380 | | <canonical_units>K</canonical_units> |
|---|
| 2381 | | <description>The surface called "surface" means the lower boundary of the atmosphere. The sea surface subskin temperature is the temperature at the base of the conductive laminar sub-layer of the ocean surface, that is, at a depth of approximately 1 - 1.5 millimeters below the air-sea interface. For practical purposes, this quantity can be well approximated to the measurement of surface temperature by a microwave radiometer operating in the 6 - 11 gigahertz frequency range, but the relationship is neither direct nor invariant to changing physical conditions or to the specific geometry of the microwave measurements. Measurements of this quantity are subject to a large potential diurnal cycle due to thermal stratification of the upper ocean layer in low wind speed high solar irradiance conditions.</description> |
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| 4151 | | <description>The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "Upward" indicates a vector component which is positive when directed upward (negative downward). "Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Upward eastward" indicates the ZX component of a tensor. An upward eastward momentum flux is an upward flux of eastward momentum, which accelerates the upper medium eastward and the lower medium westward. Momentum flux is dimensionally equivalent to stress and pressure. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The total upward eastward momentum flux due to gravity waves is the sum of the fluxes due to orographic gravity waves and nonorographic waves. The upward eastward momentum flux due to orographic gravity waves has the standard name upward_eastward_momentum_flux_in_air_due_to_orographic_gravity_waves. The total upward eastward momentum flux due to nonorographic gravity waves is the sum of the fluxes due to eastward and westward propagating waves. The latter has the standard name upward_eastward_momentum_flux_in_air_due_to_nonorographic_westward_gravity_waves.</description> |
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| 4152 | | </entry> |
|---|
| 4153 | | <entry id="upward_eastward_momentum_flux_in_air_due_to_nonorographic_westward_gravity_waves"> |
|---|
| | 4137 | <description>The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "Upward" indicates a vector component which is positive when directed upward (negative downward). 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. The total upward momentum flux due to gravity waves is the sum of the fluxes due to orographic gravity waves and nonorographic waves. The upward momentum flux due to orographic gravity waves has the standard name upward_flux_of_eastward_momentum_due_to_orographic_gravity_waves. The total upward momentum flux due to nonorographic gravity waves is the sum of the fluxes due to eastward and westward propagating waves. The latter has the standard name upward_flux_of_eastward_momentum_due_to_nonorographic_westward _gravity_waves. </description> |
|---|
| | 4138 | </entry> |
|---|
| | 4139 | <entry id="upward_flux_of_eastward_momentum_due_to_nonorographic_westward_gravity_waves"> |
|---|
| 4155 | | <description>The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "Upward" indicates a vector component which is positive when directed upward (negative downward). "Eastward" indicates a vector component which is positive when directed eastward (negative westward). "Upward eastward" indicates the ZX component of a tensor. An upward eastward momentum flux is an upward flux of eastward momentum, which accelerates the upper medium eastward and the lower medium westward. Momentum flux is dimensionally equivalent to stress and pressure. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. The total upward eastward momentum flux due to gravity waves is the sum of the fluxes due to orographic gravity waves and nonorographic waves. The upward eastward momentum flux due to orographic gravity waves has the standard name upward_eastward_momentum_flux_in_air_due_to_orographic_gravity_waves. The total upward eastward momentum flux due to nonorographic gravity waves is the sum of the fluxes due to eastward and westward propagating waves. The former has the standard name upward_eastward_momentum_flux_in_air_due_to_nonorographic_eastward _gravity_waves.</description> |
|---|
| 4156 | | </entry> |
|---|
| 4157 | | <entry id="upward_eastward_momentum_flux_in_air_due_to_orographic_gravity_waves"> |
|---|
| | 4141 | <description>The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. "Upward" indicates a vector component which is positive when directed upward (negative downward). 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. The total upward momentum flux due to gravity waves is the sum of the fluxes due to orographic gravity waves and nonorographic waves. The upward momentum flux due to orographic gravity waves has the standard name upward_flux_of_eastward_momentum_due_to_orographic_gravity_waves. The total upward momentum flux due to nonorographic gravity waves is the sum of the fluxes due to eastward and westward propagating waves. The former has the standard name upward_flux_of_eastward_momentum_due_to_nonorographic_eastward _gravity_waves. </description> |
|---|
| | 4142 | </entry> |
|---|
| | 4143 | <entry id="upward_flux_of_eastward_momentum_due_to_orographic_gravity_waves"> |
|---|
| 4591 | | <alias id="eastward_transformed_eulerian_mean_velocity"> |
|---|
| 4592 | | <entry_id>eastward_transformed_eulerian_mean_air_velocity</entry_id> |
|---|
| 4593 | | </alias> |
|---|
| 4594 | | <alias id="northward_eliassen_palm_flux"> |
|---|
| 4595 | | <entry_id>northward_eliassen_palm_flux_in_air</entry_id> |
|---|
| 4596 | | </alias> |
|---|
| 4597 | | <alias id="northward_heat_flux_due_to_eddy_advection"> |
|---|
| 4598 | | <entry_id>northward_heat_flux_in_air_due_to_eddy_advection</entry_id> |
|---|
| 4599 | | </alias> |
|---|
| 4600 | | <alias id="northward_transformed_eulerian_mean_velocity"> |
|---|
| 4601 | | <entry_id>northward_transformed_eulerian_mean_air_velocity</entry_id> |
|---|
| 4602 | | </alias> |
|---|
| 4603 | | <alias id="upward_eliassen_palm_flux"> |
|---|
| 4604 | | <entry_id>upward_eliassen_palm_flux_in_air</entry_id> |
|---|
| 4605 | | </alias> |
|---|
| 4606 | | <alias id="upward_flux_of_eastward_momentum_due_to_nonorographic_eastward_gravity_waves"> |
|---|
| 4607 | | <entry_id>upward_eastward_momentum_flux_in_air_due_to_nonorographic_eastward_gravity_waves</entry_id> |
|---|
| 4608 | | </alias> |
|---|
| 4609 | | <alias id="upward_flux_of_eastward_momentum_due_to_nonorographic_westward_gravity_waves"> |
|---|
| 4610 | | <entry_id>upward_eastward_momentum_flux_in_air_due_to_nonorographic_westward_gravity_waves</entry_id> |
|---|
| 4611 | | </alias> |
|---|
| 4612 | | <alias id="upward_flux_of_eastward_momentum_due_to_orographic_gravity_waves"> |
|---|
| 4613 | | <entry_id>upward_eastward_momentum_flux_in_air_due_to_orographic_gravity_waves</entry_id> |
|---|
| 4614 | | </alias> |
|---|
