> I'm new the NCL mailing list and was wondering if someone could answer a quick question. Is it possible to take a collection of WRF simulations...either the WRF netCDF or Grib and generate ensemble images, such as mean, spread, spaghetti using NCL.
Yes.
---- [1] NCL can handle either netCDF or GRIB formatted data files. If you have WRF_1.nc or WRF_1.grb WRF_2.nc or WRF_2.grb : WRF_N.nc or WRF_N.grb load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl" dirw = "/my/wrf_files/" ; input directory filw = systemfunc("cd "+dirw+" ; ls WRF_*nc) ; or WRF_*grb print(filw) f = addfiles (dirw+filw, "r") ; note the "s" of addfile ListSetType (f, "join") T = f[:]->T ; read T from all files printVarSummary (T) ; (ncl_join,Time,bottom_top,south_north,west_east) The ncl_join dimension will be size N, corresponding to each ensemble member. Te = dim_avg_n_Wrap(T, 0) ; average over all ensemble members printVarSummary(Te) Use assorted NCL graphics to generated what you want. See: http://www.ncl.ucar.edu/Applications/ and/or http://www.mmm.ucar.edu/wrf/OnLineTutorial/Graphics/NCL/ Above functions: http://www.ncl.ucar.edu/Document/Functions/Built-in/addfiles.shtml See Example 2 http://www.ncl.ucar.edu/Document/Functions/Contributed/dim_avg_n_Wrap.shtml [2] The netCDF Operator (NCO) named "ncea" could be used on WRF netCDF files to generate ensemble averages and be saved to a netCDF file. http://nco.sourceforge.net/nco.html http://linux.die.net/man/1/ncea --- good Luck _______________________________________________ ncl-talk mailing list List instructions, subscriber options, unsubscribe: http://mailman.ucar.edu/mailman/listinfo/ncl-talkReceived on Sun Dec 26 09:13:28 2010
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