Dear RegCM users,

I have a question about the regcm output vertical level. I understand that regcm output is in sigma levels and after translating to the pressure level also it gives output values at 1000 hPa for High altitude regions like The Himalayas. But for echam output, which is on hybrid levels when translated to pressure levels does not give values for lower levels over Himalayas. Both outputs were precessed with CDO. What makes the difference and how one can process the REGCM output as that of echam (please see the attahced figure) to get void regions below orography. Any suggestions would be appreciated.

ncdump -h regcm.nc gives

double lon(lon) ;
                lon:standard_name = "longitude" ;
                lon:long_name = "longitude" ;
                lon:units = "degrees_east" ;
                lon:axis = "X" ;
        double lat(lat) ;
                lat:standard_name = "latitude" ;
                lat:long_name = "latitude" ;
                lat:units = "degrees_north" ;
                lat:axis = "Y" ;
        double lev(lev) ;
                lev:standard_name = "air_pressure" ;
                lev:long_name = "pressure" ;
                lev:units = "Pa" ;
                lev:positive = "down" ;
                lev:axis = "Z" ;
        double time(time) ;
                time:standard_name = "time" ;
                time:units = "hours since 1997-10-01 03:00:00" ;
                time:calendar = "proleptic_gregorian" ;

ncdump -h echam.nc gives

double lon(lon) ;
                lon:long_name = "longitude" ;
                lon:units = "degrees_east" ;
                lon:standard_name = "longitude" ;
        double lat(lat) ;
                lat:long_name = "latitude" ;
                lat:units = "degrees_north" ;
                lat:standard_name = "latitude" ;
        double lev(lev) ;
                lev:long_name = "pressure" ;
                lev:units = "Pa" ;
                lev:axis = "z" ;
        double time(time) ;
                time:units = "day as %Y%m%d.%f" ;
                time:calendar = "proleptic_gregorian" ;

Thanks,

Mr. Rajesh J.
Consultatnt,
{'PRITHVI' High Performance Computing System,
Indian Institute of Tropical Meteorology,Pune}
HCL Infosystems Ltd.
Arena 10, Pune Nagar Road, Viman Nagar, Pune