Hello,
I need all sky direct radiation at the surface. But, I could not find this parameter in the MERRA-2 radiation files (e.g., MERRA2_400.tavg1_2d_rad_Nx.20180728.SUB.nc).
Can anyone tell me how to obtain this parameter.
regards
Radiation
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GES DISC - mgreene
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Re: Radiation
Hello,
The best that we can do is PARDR+NIRDR to get direct radiation that is missing
a part in the UV, the model developer I asked says that this should be ~96% of
the direct SW radiation
PARDR is in tavg1_2d_lfo_Nx (M2T1NXLFO): Land Surface Forcings
NIRDR is in tavg1_2d_flx_Nx (M2T1NXFLX): Surface Flux Diagnostics
Hope this helps.
The best that we can do is PARDR+NIRDR to get direct radiation that is missing
a part in the UV, the model developer I asked says that this should be ~96% of
the direct SW radiation
PARDR is in tavg1_2d_lfo_Nx (M2T1NXLFO): Land Surface Forcings
NIRDR is in tavg1_2d_flx_Nx (M2T1NXFLX): Surface Flux Diagnostics
Hope this helps.