Dear Sylvia,
Thanks for the info.
1. Averaging timsteps
For a file (ha*.nc) that contains 60 timesteps and I want to obtain a file
that contains 30 timesteps as my output.
For a file that contains 62 timesteps, I want to obtain 31 timesteps in my
output files.
I have used ncra to obtain a monthly file from these (ie just one value).
Because it simply averages all timesteps. Now I want to average
over strides 2.
I shall check the regridding facilities in NCL, like you suggested.
Thanks
Ben
Benjamin L. Lamptey Phone: (814) 863-7689 (office)
The Pennsylvania State University (814) 862-8384 (home)
Department of Meteorology Fax: (814) 865-3663
503 Walker Building
University Park, PA 16802
Email: lamptey AT essc.psu.edu WWW: http://www.essc.psu.edu/~lamptey
or : bll146@psu.edu
or : ben_lamptey@yahoo.com
On Wed, 25 Oct 2000, Sylvia Murphy wrote:
>
> benjamin,
>
> 1) NCO:
>
> You want to use the ncra netCDF operator to create a time average. On
> the command line you would type something like:
>
> ncra dec.nc jan.nc feb.nc DJF.nc
>
> ncra will average the record dimensions of the three files and create an
> output file which I have called DJF.nc.
>
> to average two time steps in a file to create a "daily" file will depend
> upon how the file is structured. If there are only 2 time steps per file,
> then you may want to try ncra file1.nc ave.nc. I have never tried to
> just average one file like this, but it may work.
>
> On the CCSM Support Network, we have two sources to learn about NCO. The
> first is a pdf users manual:
> http://www.cgd.ucar.edu/csm/support/Document/manual.shtml
>
> and the second is an on-line powerpoint presentation:
> http://www.cgd.ucar.edu/csm/support/Document/show.shtml
>
>
> 2) Regridding:
>
> I would not use the netCDF operators to regrid your data. They were not
> designed for such uses. Instead, take a gander at all the NCL regridding
> routines available. 14 options at present
>
>
> http://ngwww.ucar.edu/ngdoc/ng/ref/ncl/NclFuncsAndProcs.html#RegriddingFunctions
>
>
> regards,
>
> sylvia
>
>
> ******************************************************
> Sylvia Murphy EML: murphys@ucar.edu
> NCAR CGD/CAS PHN: 303-497-1720
> 1850 Table Mesa Dr FAX: 303-497-1333
> Boulder, CO 80305
>
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> http://www.cgd.ucar.edu/csm/support/CSM_Graphics/
>
> ******************************************************
>
>
>
>
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