[RegCNET] Re: Question about topo data etc

[moetasim]

>hi, 
>why I don't download the the file'topo'data of NNRP1 or NNRP2 from the 
>website of http://www.ictp.trieste.it/~pubregcm/RegCM3/globedat.htm?

Hi,

RegCM uses high resolution topo and landuse data set of 60,30,10,5 or 2 MIN 
resolution instead of NNRP or anyother topo data. Also, we do not use 
surface temperature and surface pressure from NNRP/ERA40. Instead, RegCM 
calculates these fields at its own while creating initial and boundary 
condition dataset. We only use five 3D variables U,V,T,H and Q from 
NNRP,ERA40 etc + SST data.

Only if input dataset is in sigma coordinates like in case of FvGCM and 
FNEST then we require PS which is needed for converting the sigma level 
gloabl data to pressure level on global domain before converting it to sigma 
level RCM  domain while creating ICBCs.

MOet