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
WEB: http://www.cgd.ucar.edu/csm/support/
http://www.cgd.ucar.edu/csm/support/CSM_Graphics/
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