number_of_days_with_lwe_thickness_of_precipitation_amount_above_threshold

new

Created: 3 Jun 2026

Proposer: Lars Bärring

Proposed Date: 2026-04-28

308 #9.

Standard names: Standard names for climate indicators based on thresholds

Change Date: 3 Jun 2026, 12:46 a.m.

number_of_days_with_lwe_thickness_of_precipitation_amount_above_threshold 1 [UUUU] P07 id: CFV13N13
The construction lwe_thickness_of_X_amount or _content means the vertical extent of a layer of liquid water having the same mass per unit area. "Precipitation" in the earth's atmosphere means precipitation of water in all phases. The abbreviation "lwe" means liquid water equivalent. 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: 3 Jun 2026, 12:49 a.m.

number_of_days_with_lwe_thickness_of_precipitation_amount_above_threshold 1 [UUUU] P07 id: CFV13N13
This standard name is deprecated in favor of similar names containing the phrase "strictly_above_threshold" or "at_or_above_threshold" depending on which is most suitable for data being newly created. Use of the more precisely defined names is recommended to avoid ambiguity as to whether the threshold value itself is included when calculating the value of the quantity. For cases where the inclusion of the threshold is unknown, or is unlikely to significantly affect the value of the quantity, it is recommended to use the name containing "strictly_above" which is generally applicable to high-precision (floating point) data. This name has not been made into an alias of the more precisely defined names to avoid unintentionally changing the meaning of existing data. "Amount" means mass per unit area. The construction lwe_thickness_of_X_amount or _content means the vertical extent of a layer of liquid water having the same mass per unit area. The abbreviation "lwe" means liquid water equivalent. "Precipitation" in the earth's atmosphere means precipitation of water in all phases. 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".