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

Merhaba Ufuk

The "vinth2p*" functions are directly out of
the old CCM Processor. No changes.

In a separate email I will send you the code.

It is not clear from the message below, but are you
talking about values that have been extrapolated?
[Your last argument is "True"]. I never use
extrapolation. For winds, the vinth2p* codes just
use the value at the lowest 'valid' level.

D

Ufuk Utku Turuncoglu wrote:
> 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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Received on Fri Oct 24 2008 - 07:30:39 MDT