Problem in converting CCSM hybrid data to pressure levels ...

Hi,

I try to modify RegCM3 ICBC code to handle CCSM hybrid coordinate data.
So, i create ic/bc files using modified code and run model using CCSM
data (b30.030e.cam2) for a five year period. After investigation and
comparing results, i realize that the precipitation pattern is not
similar with observations.

To check the results, i convert the raw CCSM data using both modified
version of the RegCM3 ICBC code and NCL (using vinth2p_ecmwf and
vinth2p). The results is not good in my case. When i compare the results
with the NCEP/NCAR Reanalysis data (from CDC), u and v component of the
wind is not similar with observations in NCL and modified ICBC converted
case. I use the following commands to convert the hybrid levels,

UonP = vinth2p(U(tt,:,:,:),hyam,hybm,pnew,PS(tt,:,:),1,P0mb,1,True)
VonP = vinth2p(V(tt,:,:,:),hyam,hybm,pnew,PS(tt,:,:),3,P0mb,1,True)

and also i try different interpolation types (lineer, log etc.) and
vinth2p_ecmwf function but the results is similar.

Is there anybody who faced this kind of problem? I also want to study
the NCL vinth2p_ecmwf and vinth2p source codes. Where is the places of
these functions in the source tar file?

PS: If you want to see the NCL script, please let me know.

Any help will be helpful for me.
Best regards,

Ufuk Turuncoglu
ITU, Informatics Institute

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