GRIB-API definition
time integrated surface clear-sky thermal radiation downwards| Accumulated downward long-wave radiation flux, clear sky | Abbreviation |
strcdW s
UERRA details
| Definition | Downward clear-sky thermal (long-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| category | 5 | long-wave radiation |
| Parameter |
NumberXXX
| clear-sky downward | 8 | Downward long-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)