tendency_of_air_temperature

complete
Created: Feb. 5, 2024
Proposer: Jonathan Gregory & Lars Barring
Proposed Date: 2024-01-10
#270
Change Date: Feb. 5, 2024, 4:45 p.m.
Term: tendency_of_air_temperature
Unit: K s-1
Unit ref: KPRS
AMIP:
GRIB:
"tendency_of_X" means derivative of X with respect to time. Air temperature is the bulk temperature of the air, not the surface (skin) temperature.
Change Date: Feb. 5, 2024, 4:52 p.m.
Term: tendency_of_air_temperature
Unit: K s-1
Unit ref: KPRS
AMIP:
GRIB:
The phrase "tendency_of_X" means derivative of X with respect to time. Air temperature is the bulk temperature of the air, not the surface (skin) temperature. It is strongly recommended to include a units_metadata attribute.
Change Date: Feb. 9, 2024, 3:48 p.m.
Term: tendency_of_air_temperature
Unit: K s-1
Unit ref: KPRS
AMIP:
GRIB:
The phrase "tendency_of_X" means derivative of X with respect to time. Air temperature is the bulk temperature of the air, not the surface (skin) temperature. In order to convert the units correctly, it is essential to know whether a temperature is on-scale or a difference. Therefore this standard strongly recommends that any variable whose units involve a temperature unit should also have a units_metadata attribute to make the distinction. units_metadata="temperature: difference" means that the temperature quantity is the difference between two temperatures, so the origin of the scale is irrelevant, and only the unit of measure matters. It is strongly recommended to include the attribute units_metadata="temperature: difference".
Change Date: Feb. 23, 2024, 4:27 p.m.
Term: tendency_of_air_temperature
Unit: K s-1
Unit ref: KPRS
AMIP:
GRIB:
The phrase "tendency_of_X" means derivative of X with respect to time. Air temperature is the bulk temperature of the air, not the surface (skin) temperature. It is strongly recommended that a variable with this standard name should have the attribute units_metadata="temperature: difference", meaning that it refers to temperature differences and implying that the origin of the temperature scale is irrelevant, because it is essential to know whether a temperature is on-scale or a difference in order to convert the units correctly (cf. https://cfconventions.org/cf-conventions/cf-conventions.html#temperature-units).