GRIB-API definition

NameAccumulated downward short-wave radiation flux, clear skyAbbreviationadswrf_csUnitJ m-2paramId:260423

 

UERRA details

DefinitionDownward clear-sky solar (short-wave) radiation at the surface (assuming transparent clouds).
Validityaccumulated (from the beginning of the forecast)
CommentThe flux sign convention is positive downwards.

 

WMO GRIB2 definition

Parameter
Discipline0meteorological products
Parameter Category4short-wave radiation
Parameter Number52

Downward short-wave radiation flux, clear sky**

Type of statistical processing1accumulated
Level
Type of first fixed surface1
ground or water surface
Scale factor of first fixed surfaceall bits to 1missing
Scaled value of first fixed surfaceall bits to 1missing
Type of second fixed surfaceall bits to 1missing
Scale factor of second fixed surfaceall bits to 1missing
Scaled value of second fixed surfaceall bits to 1missing

**newly approved  by WMO (release in May 2016)

2 Comments

  1. In the "Original name" column radiative "flux" is in for all 8 radiation parameters, but let us make clear that they are all "Accumulated" (as it says in a header above the table). For the parameters you have no longer the word "flux" which is correct. (As J/m2 is accumulated flux) or Shortwave etc. radiation only. We just have to make is as clear as possible.