atmosphere_stability_k_index

complete
Created: Jan. 18, 2024
Proposer: Jonathan Gregory
Proposed Date: 2024-01-10
#270, #271
Change Date: Jan. 18, 2024, 2:15 p.m.
Term: atmosphere_stability_k_index
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
The atmosphere_stability_k_index is an index that indicates the potential of severe convection and is often referred to a simply the k index. The index is derived from the difference in air temperature between 850 and 500 hPa, the dew point temperature at 850 hPa, and the difference between the air temperature and the dew point temperature at 700 hPa.
Change Date: Jan. 18, 2024, 2:34 p.m.
Term: atmosphere_stability_k_index
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
The atmosphere_stability_k_index is an index that indicates the potential of severe convection and is often referred to a simply the k index. The index is calculated as A + B - C, where A is the difference in air temperature between 850 and 500 hPa, B is the dew point temperature at 850 hPa, and C is the dew point depression (i.e. the differences between actual temperature and dew point temperature) at 700 hPa.
Change Date: Feb. 2, 2024, 9:30 a.m.
Term: atmosphere_stability_k_index
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
The atmosphere_stability_k_index is an index that indicates the potential of severe convection and is often referred to as simply the k index. The index is calculated as A + B - C, where A is the difference in air temperature between 850 and 500 hPa, B is the dew point temperature at 850 hPa, and C is the dew point depression (i.e. the amount by which the air temperature exceeds its dew point temperature) at 700 hPa.
Change Date: Feb. 5, 2024, 4:15 p.m.
Term: atmosphere_stability_k_index
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
The atmosphere_stability_k_index is an index that indicates the potential of severe convection and is often referred to as simply the k index. The index is calculated as A + B - C, where A is the difference in air temperature between 850 and 500 hPa, B is the dew point temperature at 850 hPa, and C is the dew point depression (i.e. the amount by which the air temperature exceeds its dew point temperature) at 700 hPa. It is strongly recommended to include a units_metadata attribute.
Change Date: Feb. 9, 2024, 2:44 p.m.
Term: atmosphere_stability_k_index
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
The atmosphere_stability_k_index is an index that indicates the potential of severe convection and is often referred to as simply the k index. The index is calculated as A + B - C, where A is the difference in air temperature between 850 and 500 hPa, B is the dew point temperature at 850 hPa, and C is the dew point depression (i.e. the amount by which the air temperature exceeds its dew point temperature) at 700 hPa. 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. It is strongly recommended to include the attribute units_metadata.
Change Date: Feb. 23, 2024, 3:54 p.m.
Term: atmosphere_stability_k_index
Unit: K
Unit ref: UPKA
AMIP:
GRIB:
The atmosphere_stability_k_index is an index that indicates the potential of severe convection and is often referred to as simply the k index. The index is calculated as A + B - C, where A is the difference in air temperature between 850 and 500 hPa, B is the dew point temperature at 850 hPa, and C is the dew point depression (i.e. the amount by which the air temperature exceeds its dew point temperature) at 700 hPa. It is strongly recommended that a variable with this standard name should have a units_metadata attribute, with one of the values "on-scale" or "difference", whichever is appropriate for the data, because it is essential to know whether the temperature is on-scale (meaning relative to the origin of the scale indicated by the units) or refers to temperature differences (implying that the origin of the temperature scale is irrevelant), in order to convert the units correctly (cf. https://cfconventions.org/cf-conventions/cf-conventions.html#temperature-units).