change_over_time_in_sea_water_potential_temperature

complete
Created: Feb. 5, 2024
Proposer: Jonathan Gregory & Lars Barring
Proposed Date: 2024-01-10
#270
Change Date: Feb. 5, 2024, 3:32 p.m.
Term: change_over_time_in_sea_water_potential_temperature
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure. The phrase "change_over_time_in_X" means change in a quantity X over a time-interval, which should be defined by the bounds of the time coordinate.
Change Date: Feb. 5, 2024, 3:37 p.m.
Term: change_over_time_in_sea_water_potential_temperature
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure. The phrase "change_over_time_in_X" means change in a quantity X over a time-interval, which should be defined by the bounds of the time coordinate. It is strongly recommended to include a units_metadata attribute.
Change Date: Feb. 9, 2024, 3:46 p.m.
Term: change_over_time_in_sea_water_potential_temperature
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure. The phrase "change_over_time_in_X" means change in a quantity X over a time-interval, which should be defined by the bounds of the time coordinate. 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, 4:21 p.m.
Term: change_over_time_in_sea_water_potential_temperature
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
Potential temperature is the temperature a parcel of air or sea water would have if moved adiabatically to sea level pressure. The phrase "change_over_time_in_X" means change in a quantity X over a time-interval, which should be defined by the bounds of the time coordinate. 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).