Created: 11 Aug 2023

Proposer: Klaus Zimmermann

Proposed Date: 2021-09-23

Change Date: 11 Aug 2023, 2:28 p.m.

Term: **number_of_days_with_air_temperature_above_threshold**

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

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 coordinate variable or scalar coordinate variable with the standard name of X to supply the threshold(s). 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".

Change Date: 11 Aug 2023, 2:35 p.m.

Term: **number_of_days_with_air_temperature_above_threshold**

Unit: 1

Unit ref: UUUU

AMIP:

GRIB:

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.