Compute the downward flux of long-wave radiation
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real, | intent(in) | :: | ta(ix,il,kx) | Absolute temperature [K]  | 
  
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| real, | intent(out) | :: | fsfcd(ix,il) | Downward flux of long-wave radiation at the surface  | 
  
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| real, | intent(out) | :: | dfabs(ix,il,kx) | Flux of long-wave radiation absorbed in each atmospheric layer  |