number_of_days_with_air_temperature_strictly_below_threshold

new

Created: 19 May 2026

Proposer: Lars Bärring

Proposed Date: 2026-04-28

308 #5,6.

Standard names: Standard names for climate indicators based on thresholds

Change Date: 19 May 2026, 6 p.m.

number_of_days_with_air_temperature_below_threshold 1 [UUUU] P07 id: CFV13N12
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: 19 May 2026, 6:01 p.m.

number_of_days_with_air_temperature_strictly_below_threshold 1 [UUUU]
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: 19 May 2026, 6:02 p.m.

number_of_days_with_air_temperature_strictly_below_threshold 1 [UUUU]
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_strictly_below_threshold is a count of the number of days on which the condition X_strictly_below_threshold is satisfied, where the threshold value itself is excluded (strict inequality). 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".