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WRF surface net radiation

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J

JulioMtz

New member
Dear all,

I've been trying to calculate surface net radiation from WRFv4.0. In recent posts is indicated that this can be done with the following equation:

((1-0.23)*ACSWDNB + ACLWDNB - ACLWUPB)/1e6

However, the d01.ctl file does not contain any of these variables. Is it possible to calculate net radiation with the following variables?

ACHFX
ACLHF
ACGRDFLX

Thanks!
 
Hi,
wrfout files include the following terms:

GSW: NET SHORT WAVE FLUX AT GROUND
GLW: DOWNWARD LONG WAVE FLUX AT GROUND
EMISS: SURFACE EMISSIVITY
TSK: SURFACE SKIN TEMPERATURE

net radiation can be derived from the above terms.
 
Thanks Dr. Ming,

Is the previous equation still valid with these new variables?

Thanks in advance.

Julio.
 
Julio,
Those variables named "ACxxx" are accumulative terms related to radiation. We usually calculate net radiation using instantaneous output of GSW, GLW, etc.

By thee way, where did you get the algorithm: ((1-0.23)*ACSWDNB + ACLWDNB - ACLWUPB)/1e6?
Personally I don't think accurate net radiation can be obtained by this algorithm.
 
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