area averaging for climatology

[Charles Seman]

Teddy,

Maybe the GrADS "modify" command may help?
http://grads.iges.org/grads/gadoc/gradcomdmodify.html
'set t 1 12'
'define sstclim = ave(sst, t+0, t=600, 12)'
'modify sstclim seasonal'
'set t 1 last'
'define anom = sst - sstclim'

Chuck

Teddy Allen wrote:
> Dear GrADS users,
> I am trying to compute a single value for SST in a particular region for
> an averaged time period. Ideally, I would like to average a region and
> then compute the values of that single region for Jan. of 1982-2007 (set t
> 2 302 12)....
> Is it possible to compute a single spatially averaged value of SST during
> a temporally averaged  time period? I understand how to do them
> individually, but together I am confused. I am trying to average a sst in
> the NINO3 region for all January months in the 1982-2007 Reynolds 1x1
> degree SST dataset. I expect to find one SST that defines the average Jan.
> temp within that region from 1982 to 2007. ( While this may not be
> pertinent to anything of significance, it should provide a template to use
> in other more meaningful applications...)
>
> I have entered:
> define nino3 = aave (sst, lon=210, lon=270, lat=-5, lat=5)
> define janino3 = ave(nino3, t=2, t=302, 12)
> d janino3
>
> Thank you for any advice or direction.
> teddy
>

--

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

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 Charles Seman                                Charles.Seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
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