Change Date: Feb. 5, 2024, 3:54 p.m.

Term: temperature_in_surface_snow

Unit: K

Unit ref: UPKA

AMIP:

GRIB: E238

"Temperature in surface snow" is the bulk temperature of the snow, not the surface (skin) temperature. Surface snow refers to the snow on the solid ground or on surface ice cover, but excludes, for example, falling snowflakes and snow on plants.

Change Date: Feb. 5, 2024, 3:59 p.m.

Term: temperature_in_surface_snow

Unit: K

Unit ref: UPKA

AMIP:

GRIB: E238

"Temperature in surface snow" is the bulk temperature of the snow, not the surface (skin) temperature. Surface snow refers to the snow on the solid ground or on surface ice cover, but excludes, for example, falling snowflakes and snow on plants. It is strongly recommended to include a units_metadata attribute.

Change Date: Feb. 9, 2024, 3:26 p.m.

Term: temperature_in_surface_snow

Unit: K

Unit ref: UPKA

AMIP:

GRIB: E238

"Temperature in surface snow" is the bulk temperature of the snow, not the surface (skin) temperature. Surface snow refers to the snow on the solid ground or on surface ice cover, but excludes, for example, falling snowflakes and snow on plants. 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, 4:01 p.m.

Term: temperature_in_surface_snow

Unit: K

Unit ref: UPKA

AMIP:

GRIB: E238

"Temperature in surface snow" is the bulk temperature of the snow, not the surface (skin) temperature. Surface snow refers to the snow on the solid ground or on surface ice cover, but excludes, for example, falling snowflakes and snow on plants. 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).