Re: WRF and rcm2rgrid

Hi David,
Make sure that the range of longitudes of your WRF data matches the
range of longitudes in your new longitude array (jlon).
I'd do a printMinMax on the lon2d array to check. If the ranges of your
input/output longitudes do match, let us know and we can take a deeper
look.
Best regards,
Adam

David Porter wrote:
> Hi,
>
> I am having problems when trying to regrid my WRF output to a gaussian
> grid (to compare to a reanalysis). The regridded data is mostly, but
> not all, missing values. The WRF domain is pan-arctic. I have a
> feeling it is due to the ordering of the 2D lat/lon arrays. I have
> enclosed both my script and output.
>
> Thanks
> Dave
>
> Copyright (C) 1995-2009 - All Rights Reserved
> University Corporation for Atmospheric Research
> NCAR Command Language Version 5.1.1
> The use of this software is governed by a License Agreement.
> See http://www.ncl.ucar.edu/ for more details.
>
>
> Variable: fi
> Type: float
> Total Size: 1804000 bytes
> 451000 values
> Number of Dimensions: 3
> Dimensions and sizes: [Time | 8] x [south_north | 205] x [west_east
> | 275]
> Coordinates:
> Number Of Attributes: 6
> FieldType : 104
> MemoryOrder : XY
> description : TOA OUTGOING LONG WAVE
> units : W m-2
> stagger :
> coordinates : XLONG XLAT
> (0)
> (0) TOA OUTGOING LONG WAVE: min=95.4118 max=304.182
>
>
> Variable: lat2d
> Type: float
> Total Size: 225500 bytes
> 56375 values
> Number of Dimensions: 2
> Dimensions and sizes: [south_north | 205] x [west_east | 275]
> Coordinates:
> Number Of Attributes: 5
> FieldType : 104
> MemoryOrder : XY
> description : LATITUDE, SOUTH IS NEGATIVE
> units : degrees_north
> stagger :
>
>
> Variable: lon2d
> Type: float
> Total Size: 225500 bytes
> 56375 values
> Number of Dimensions: 2
> Dimensions and sizes: [south_north | 205] x [west_east | 275]
> Coordinates:
> Number Of Attributes: 5
> FieldType : 104
> MemoryOrder : XY
> description : LONGITUDE, WEST IS NEGATIVE
> units : degrees_east
> stagger :
>
>
> Variable: fir
> Type: float
> Total Size: 1638400 bytes
> 409600 values
> Number of Dimensions: 3
> Dimensions and sizes: [Time | 8] x [lat | 160] x [lon | 320]
> Coordinates:
> lat: [-89.14152..89.14152]
> lon: [ 0..358.875]
> Number Of Attributes: 8
> _FillValue : -999
> FieldType : 104
> MemoryOrder : XY
> description : TOA OUTGOING LONG WAVE
> units : W m-2
> stagger :
> coordinates : XLONG XLAT
> ncl : rcm2rgrid used for interpolation
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
> ;load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
> load "/home/porterdf/src/NCL/WRFUserARW.ncl"
>
> begin
> f = addfile("/data4/porterdf/wrfout20001231.nc","r")
> fi = f->OLR
> lat2d = f->XLAT(0,:,:)
> lon2d = f->XLONG(0,:,:)
> lat2d_at_units = "degrees_north"
> lon2d_at_units = "degrees_east"
> printVarSummary(fi)
> printMinMax(fi, True )
> printVarSummary(lat2d)
> printVarSummary(lon2d)
>
> jlat = latGau(160, "lat", "latitude", "degrees_north")
> jlon = lonGlobeF(320, "lon", "longitude", "degrees_east")
>
> fir = rcm2rgrid_Wrap(lat2d,lon2d,fi,jlat,jlon,1)
> printVarSummary(fir)
>
> ;************************************************
> ; create plot
> ;************************************************
> plDir = "./" ; output dir for plots
> plFile = "test"
> type = "x11" ; create variable
> to hold info
> type_at_wkColorModel = "cmyk" ; make output cmyk
> wks = gsn_open_wks(type,plDir+plFile) ; open a ps
> file
> gsn_define_colormap(wks,"testcmap") ; choose colormap
>
> res = True ; plot mods desired
> res_at_gsnPolar = "NH" ; select the N. Hem.
> res_at_mpMinLatF = 60 ; minimum lat to plot
> res_at_mpFillOn = False
> res_at_cnFillOn = True ; color fill
> res_at_cnLinesOn = False ; no contour lines
>
> res_at_gsnSpreadColors = True ; use full colormap
> res_at_gsnSpreadColorStart = 2
> res_at_gsnSpreadColorEnd = -3
>
> plot = gsn_csm_contour_map_polar(wks,fir(0,:,:), res)
>
> end
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-- 
__________________________________________________
Adam Phillips 
asphilli_at_ucar.edu
National Center for Atmospheric Research   tel: (303) 497-1726
Climate and Global Dynamics Division         fax: (303) 497-1333
P.O. Box 3000				
Boulder, CO 80307-3000    http://www.cgd.ucar.edu/cas/asphilli
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