GRIB-API definition
| Name | Accumulated downward short-wave radiation flux, clear sky | Abbreviation | adswrf_cs | Unit | J m-2 | paramId: | 260423 |
UERRA details
| Definition | Downward clear-sky solar (short-wave) radiation at the surface (assuming transparent clouds). |
| Validity | accumulated (from the beginning of the forecast) |
| Comment | The flux sign convention is positive downwards. |
WMO GRIB2 definition
| Parameter | ||
|---|---|---|
| Discipline | 0 | meteorological products |
| Parameter Category | 4 | short-wave radiation |
| Parameter Number | 52 | Downward short-wave radiation flux, clear sky** |
| Type of statistical processing | 1 | accumulated |
| Level | ||
|---|---|---|
| Type of first fixed surface | 1 | ground or water surface |
| Scale factor of first fixed surface | all bits to 1 | missing |
| Scaled value of first fixed surface | all bits to 1 | missing |
| Type of second fixed surface | all bits to 1 | missing |
| Scale factor of second fixed surface | all bits to 1 | missing |
| Scaled value of second fixed surface | all bits to 1 | missing |
**newly approved by WMO (release in May 2016)
2 Comments
Per Unden
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.
Richard Mladek
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