Use NCL's ESMF regridding capabilities:
http://www.ncl.ucar.edu/Applications/ESMF.shtml
**Please read the documentation.**
Specifically, you can use
http://www.ncl.ucar.edu/Document/Functions/ESMF/ESMF_regrid_with_weights.shtml
with the weight file below
--- Attached is a sample plot for a rectilinear grid (T62) to a POP grid. The weight file is at: ftp ftp.cgd.ucar.edu anonymous email cd pub/shea/ESMF prompt get wgt.RL_T62_to_gx1v3.bilinear.nc quit On 11/1/13 5:31 AM, Prasad, Siva wrote: > I have used SCRIP to generate the weight file. > When I used the conservative remapping as explained in > http://www.cesm.ucar.edu/models/ocn-pop/scrip.shtml > > I got the following error ( still trying to figure out) > > > Using latitude bins to restrict search. > Computing remappings between: POP 3 Displaced-Pole T grid > and T62 Gaussian Grid > grid1 sweep > STOP integration stalled: num_subseg exceeded limit > > > Finally, I did a bilinear map method which gave me incorrect values. > > > Please let me know if I have chosen the wrong method. > > > Thanks > Siva > > > On Fri, Nov 1, 2013 at 1:20 AM, Mary Haley <haley@ucar.edu> wrote: > >> Prasad, >> >> Can you please be more specific about what you mean about the weight file >> being wrong? Are you getting some kind of error message, or are the values >> incorrect, or something else? >> >> --Mary >> >> On Oct 31, 2013, at 5:35 AM, "Prasad, Siva" <sp4436@mun.ca> wrote: >> >> Hi Dennis >> >> Thank you very much. I could resolve the error with the suggested change. >> >> Unfortunately, weightfile seems to be wrong. >> >> Regards >> Siva >> >> >> On Wed, Oct 30, 2013 at 4:57 PM, Dennis Shea <shea@ucar.edu> wrote: >> >>> I am not sure about this but I speculate that the >>> variable 'air' on the file is type short. >>> It *must* be unscaled prior to use. >>> >>> short air(time,lat,lon) >>> ^^^^^ >>> >>> plus it will have associated attributes named: >>> "add_offset" and "scale_factor" >>> >>> === >>> >>> Try: >>> >>> var = short2flt(f->air) >>> >>> http://www.ncl.ucar.edu/**Document/Functions/** >>> Contributed/short2flt.shtml<http://www.ncl.ucar.edu/Document/Functions/Contributed/short2flt.shtml> >>> >>> === >>> The 1st rule of data processing is 'look at your data'. >>> >>> Please use the following to examimine file contents. >>> >>> %> ncdump -h air.2m.gauss.1997.nc | less >>> >>> or >>> >>> %> ncl_filedump air.2m.gauss.1997.nc | less >>> >>> >>> >>> On 10/30/13 11:48 AM, Prasad, Siva wrote: >>> >>>> Hi all, >>>> >>>> I am new to NCL. I have generated a weight file for T62 >>>> (map_T62_to_gx3_bilin_da_**301310.nc) >>>> >>>> I tried to use the following ncl script to remap to the POP but it shows >>>> error >>>> >>>> load "$NCARG_ROOT/lib/ncarg/**nclscripts/csm/gsn_code.ncl" >>>> load "$NCARG_ROOT/lib/ncarg/**nclscripts/csm/gsn_csm.ncl" >>>> load "$NCARG_ROOT/lib/ncarg/**nclscripts/csm/contributed.**ncl" >>>> load "$NCARG_ROOT/lib/ncarg/**nclscripts/csm/popRemap.ncl" >>>> >>>> a = addfile("air.2m.gauss.1997.nc"**,"r") >>>> var = a->air >>>> remap = PopLatLon(var,"T62","gx3","**bilin","da","301310") >>>> >>>> out=addfile("t_10.nc","c") >>>> filedimdef(out,"time",-1,True) >>>> out->t10=remap >>>> >>>> I get the following error >>>> >>>> (0) >>>> (0) create_rmpPopFileName: ./map_T62_to_gx3_bilin_da_**301310.nc >>>> fatal:pop_remap: dst_array must be of type float or double >>>> fatal:["Execute.c":8128]:**Execute: Error occurred at or near line 462 >>>> in >>>> file $NCARG_ROOT/lib/ncarg/**nclscripts/csm/popRemap.ncl >>>> >>>> fatal:["Execute.c":8128]:**Execute: Error occurred at or near line 642 >>>> in >>>> file $NCAT >>>> >>>> Thanks and Regards >>>> Nandu >>>> >>>> >>>> >>>> ______________________________**_________________ >>>> ncl-talk mailing list >>>> List instructions, subscriber options, unsubscribe: >>>> http://mailman.ucar.edu/**mailman/listinfo/ncl-talk<http://mailman.ucar.edu/mailman/listinfo/ncl-talk> >>>> >>>> >> _______________________________________________ >> ncl-talk mailing list >> List instructions, subscriber options, unsubscribe: >> http://mailman.ucar.edu/mailman/listinfo/ncl-talk >> >> >> >
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