tc_chakraborty@yale_edu
New Member
I have been running CLM with my own forcing data created from a CAM run. The data are at 3-hourly time step. When I run CLM using these data and output hourly data, I get extremely high values of FSDS (more than the solar constant) for some time steps, even though the forcing data does not have these high values. Consider the cases below.
In this first case, I am showing the incoming radiation (FSDSdir+FSDSdif) for 2004-04 for a few points around the world. These data can be found in Sum_2004-04.nc (made from adding FSDSdir and FSDSdif from Aero_Solr.2004-04.nc) in /glade/scratch/tchakra/MYUSRDAT_aerosols/ The values are reasonable.
In the second case, I am showing the incoming radiation (FSDS) for 2004-04-26 for a few points around the world from the CLM output (which is forced using the dataset above). These data can be found in /glade/scratch/tchakra/archive/CAM_CLM_6yr_noaero/lnd/hist/ and the name of this particular file is CAM_CLM_6yr_noaero_clm2.h1.2004-04-26-00000.nc
Some of the values cross 1400 W m^{-2} and I have seen values as high as 1900 W m^{-2}. Is this happening because I am outputting hourly data even though the forcing is every 3 hours? As in, is this an artifact of the interpolation scheme within CLM?
Not sure if I should post this in the bug section or if this is a known issue. Note that when I output monthly data, the values seem to make sense (compared to observations).
Please advise.
Regards,
TC
In this first case, I am showing the incoming radiation (FSDSdir+FSDSdif) for 2004-04 for a few points around the world. These data can be found in Sum_2004-04.nc (made from adding FSDSdir and FSDSdif from Aero_Solr.2004-04.nc) in /glade/scratch/tchakra/MYUSRDAT_aerosols/ The values are reasonable.
In the second case, I am showing the incoming radiation (FSDS) for 2004-04-26 for a few points around the world from the CLM output (which is forced using the dataset above). These data can be found in /glade/scratch/tchakra/archive/CAM_CLM_6yr_noaero/lnd/hist/ and the name of this particular file is CAM_CLM_6yr_noaero_clm2.h1.2004-04-26-00000.nc
Some of the values cross 1400 W m^{-2} and I have seen values as high as 1900 W m^{-2}. Is this happening because I am outputting hourly data even though the forcing is every 3 hours? As in, is this an artifact of the interpolation scheme within CLM?
Not sure if I should post this in the bug section or if this is a known issue. Note that when I output monthly data, the values seem to make sense (compared to observations).
Please advise.
Regards,
TC