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using the correct value of PHIS in SD-WACCM

anushree

Member
Hi all,
I have generated 3hourly meteorology from free running WACCM (FWHIST) for a future period year-2035.
I am prescribing this meteorology to another simulation using the Specified dynamics WACCM (FWSD) compset.
What should be the value of PHIS in the bnd_topo namelist setting?
I am assuming that the model reads the PHIS values from the bnd_topo rather than the met files which also have a PHIS value.
So,should i create a new bnd_topo file with PHIS values equal to PHIS values of any of the timestep from the met files i have generated?
But how do i create values for other variables SGH and SGH30 used in the bnd_topo file?
Kindly help me out.
Regards,
Anushree
 

fvitt

CSEG and Liaisons
Staff member
Hi Anushree,
You are correct in assuming the SD model uses PHIS from the bnd_topo file which should be consistent with the PHIS in the meteorology inputs. In your case you can simply use the same bnd_topo file that was used by FWHIST to generate the meteorology.
Hope this helps.
 

anushree

Member
Hi Anushree,
You are correct in assuming the SD model uses PHIS from the bnd_topo file which should be consistent with the PHIS in the meteorology inputs. In your case you can simply use the same bnd_topo file that was used by FWHIST to generate the meteorology.
Hope this helps.
Thank you for replying me.
The bnd_topo file used in FWHIST was fv_0.9x1.25_nc3000_Nsw042_Nrs008_Co060_Fi001_ZR_sgh30_24km_GRNL_MERRA2_c171218.nc
The cesm generated PHIS and MERRA2 PHIS (the above file) did look minutely different(ncview) so i thought of replacing the bnd_topo in the above file with the cesm generated PHIS value to match with the PHIS in the meteorology inputs.
Regards,
Anushree
 
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