Calculating Seasonal Averages in grads

[Bill Bua]

Megan --

Try using the time increment option in the ave function like so:  d
ave(<variable>,t-1,t+1,12) for monthly data, centered on the middle
month of the season. If your anomaly time series starts with January,
you'd want to start with January of the second year (t=13 for your
data).  Note that if any data is missing (say you don't have Dec.), the
average will be computed using whatever months are available.

Hope this helps,

Bill Bua

Megan Linkin wrote:
> Hi all-
> We're looking for an easy way to calcuate seasonal averages in grads.  We
> have anomalies for all months and are trying to return a DJF average of
> the anomalies, not just a December or January or February average.  I
> think we're missing one step, so if anyone has any suggestions as to how
> to go about doing that, it would be extremely helpful.  Thank you so
> much!
> ~Megan Linkin
>
> Megan Linkin
> Graduate Research Assistant
> CSS 2330
> Department of Atmospheric and Oceanic Science
> University of Maryland
> College Park, MD 20742
> 301-405-7093
> mlinkin at atmos.umd.edu