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<p class=MsoNormal>Hi all,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am using the vert_1.ncl to convert CCSM data (for WRF)
from hybrid to pressure.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Although, T, U, V and Humidity were successful, there is a
problem with conversion of geopotential heights, despite using surface
geopotential and surface pressure.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I use vinth2p_ecmwf, since I need values upto 1000mb .( ie
extrapolation).<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My code is below<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any help in conversion please..<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks a lot<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Sri<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>---------------------------<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><span lang=FR>;*************************************************<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>; NCL tutorial script: vert_1.ncl<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>;************************************************<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>load
"$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>load
"$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>;************************************************<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>begin<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=FR>Ntime = 1<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=FR>;************************************************<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>; file handling<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR>;************************************************<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=FR> fn1 =
"b30.042e.cam2.h3.Z3.60E-150E_50S-50N.2000-01-01_cat_2000-12-31.nc" ;
define filename<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR> in1 =
addfile(fn1,"r") ; open netcdf file<o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR> <o:p></o:p></span></p>
<p class=MsoNormal><span lang=FR> </span>Z3 =
in1->Z3 ; select variable to ave<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> P0mb =1000.<o:p></o:p></p>
<p class=MsoNormal> hyam = in1->hyam ; get a
coefficiants<o:p></o:p></p>
<p class=MsoNormal> hybm = in1->hybm ; get b
coefficiants<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> <span lang=PT-BR>fn2 =
"b30.042e.cam2.h3.PS.60E-150E_50S-50N.2000-01-01_cat_2009-12-31.nc" ;
define filename<o:p></o:p></span></p>
<p class=MsoNormal><span lang=PT-BR> </span>in2 =
addfile(fn2,"r") ; open netcdf file<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> <span lang=PT-BR>PS =
in2->PS <o:p></o:p></span></p>
<p class=MsoNormal><span lang=PT-BR><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=PT-BR> fn3 = "b30.042e.cam2.h3.PHIS.60E-150E_50S-50N.2000-01-01_cat_2009-12-31.nc"
; define filename<o:p></o:p></span></p>
<p class=MsoNormal><span lang=PT-BR> </span>in3 =
addfile(fn3,"r") ; open netcdf file<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> PHIS = in3->PHIS <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> fn4 =
"b30.042e.cam2.h3.TS.60E-150E_50S-50N.2000-01-01_cat_2009-12-31.nc" ;
define filename<o:p></o:p></p>
<p class=MsoNormal> in4 = addfile(fn4,"r")
; open netcdf file<o:p></o:p></p>
<p class=MsoNormal> <o:p></o:p></p>
<p class=MsoNormal> TS = in4->TS <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>;************************************************<o:p></o:p></p>
<p class=MsoNormal>; define other arguments required by vinth2p<o:p></o:p></p>
<p class=MsoNormal>;************************************************<o:p></o:p></p>
<p class=MsoNormal>; type of interpolation: 1 = linear, 2 = log, 3 = loglog<o:p></o:p></p>
<p class=MsoNormal> interp = 2<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>; is extrapolation desired if data is outside the range of
PS<o:p></o:p></p>
<p class=MsoNormal> extrap = True<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>; create an array of desired pressure levels: <o:p></o:p></p>
<p class=MsoNormal>pnew =
(/1000,950,900,850,800,750,700,650,600,550,500,450,400,350,300,250,200,150,100/)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>;************************************************<o:p></o:p></p>
<p class=MsoNormal>; calculate T on pressure levels<o:p></o:p></p>
<p class=MsoNormal>;************************************************<o:p></o:p></p>
<p class=MsoNormal>; note, the 7th argument is not used, and so is set to 1.<o:p></o:p></p>
<p class=MsoNormal>;************************************************<o:p></o:p></p>
<p class=MsoNormal>; VARonP =
vinth2p(Z3(0:Ntime,:,:,:),hyam,hybm,pnew,PS(0:Ntime,:,:),interp,P0mb,1,extrap)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> VARonP =
vinth2p_ecmwf(Z3(0:Ntime,:,:,:),hyam,hybm,pnew,PS(0:Ntime,:,:),interp,P0mb,1,extrap,-1,TS(0:Ntime,:,:),PHIS(0:Ntime,:,:))<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>;output in nc file<o:p></o:p></p>
<p class=MsoNormal> system("/bin/rm -f ./Z3_pressure.nc") ;
remove any pre-existing file<o:p></o:p></p>
<p class=MsoNormal> ncdf = addfile("./Z3_pressure.nc"
,"c") ; open output netCDF file<o:p></o:p></p>
<p class=MsoNormal> filedimdef(ncdf,"time",-1,True)<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> VARonP!0 = "time" ;
assign named dimensions<o:p></o:p></p>
<p class=MsoNormal> <span lang=SV>VARonP!1 = "lev"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=SV> VARonP!2 = "lat"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=SV> VARonP!3 = "lon"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=SV><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=SV> </span>VARonP&time =
in1&time(0:Ntime)<o:p></o:p></p>
<p class=MsoNormal> <span lang=SV>VARonP&lev = pnew<o:p></o:p></span></p>
<p class=MsoNormal><span lang=SV> VARonP&lat = in1&lat<o:p></o:p></span></p>
<p class=MsoNormal><span lang=SV> </span>VARonP&lon = in1&lon<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> VARonP@long_name = "Geopotential Height on
plevel" ; assign name<o:p></o:p></p>
<p class=MsoNormal> <span lang=SV>VARonP@units = "m"<o:p></o:p></span></p>
<p class=MsoNormal><span lang=SV><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=SV> ncdf->Z3_pres = VARonP<o:p></o:p></span></p>
<p class=MsoNormal><span lang=SV><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=SV> </span>print("finish convert Z3 to
pressure level")<o:p></o:p></p>
<p class=MsoNormal> print("output .nc: ./Z3_pressure.nc")<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>end<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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