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 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: 3 Jun 2026, 6:27 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_above_threshold|X_strictly_below_threshold|X_at_or_above_threshold|X_at_or_below_threshold is a count of the number of days on which the threshold condition is satisfied. A condition of the form strictly_above|below means the threshold value itself is excluded (strict inequality). A condition of the form at_or_above_threshold|at_or_below_threshold means the threshold value itself is included. A variable whose standard name has the form number_of_days_with_X relative to a threshold condition 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".