[gradsusr] area average method

[hersala]

Dear Satyaban:
I suggest you to see the function *aave*. You will find more information in:
http://www.iges.org/grads/gadoc/gadocindex
I have used it, for instance, with temperatures from NCEP reanalysis model.

Regards,
Hernán Sala
Instituto Antártico Argentino



2010/8/16 Satyaban BishoyiRatna <satya_atmos at rediffmail.com>

>
> Dear User,
> I saw some script, where people follow two method to calculate the area
> average value of a specific parameter.
>
> First method is:
> 'tmp1=ave(tmp*cos(lat*(3.14/180.)),lat=5,lat=50)'
> 'tmp2=ave(tmp1,lon=40,lon=120)'
> 'd tmp2'
>
> Second method is:
> 'tmp1=ave(tmp,lon=60,lon=100,lat=7,lat=40)'
> 'd tmp1'
>
> Which method one should follow and what the difference one should get.
>
> Thanks.
> Regards
> Satyaban
>
> ########################################################
> Dr. Satyaban Bishoyi Ratna
> CDAC, Pune, India
>
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