[gradsusr] diurnal average

[Mubashar Dogar]

Dear Prof. Alan Robock & Clark,

Thanks for the reply. Yes I should have one hour 'ERA Int' model product for
the calculation of diurnal average and your suggestion are highly
appreciable.

Regards,

Mubashar

>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 8 Mar 2011 16:07:21 +0000
> From: "Clark, Douglas B." <dbcl at ceh.ac.uk>
> Subject: Re: [gradsusr] diurnal average
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID:
>        <40829B0E077C1145A6DE44D39B3830A91FF63D8E61 at nerckwmb1.ad.nerc.ac.uk
> >
> Content-Type: text/plain; charset="iso-8859-1"
>
> Mubashar,
>
> You can do something like:
>
> 'set t 1 4'
> # t=400 would be 100 days. Change to the number of timesteps in your 22
> years or data.
> 'define tave=ave(tair,t+0,t=400,4)'
> 'modify tave diurnal'
>
> This will calculate the mean diurnal cycle (and make it a "climatological"
> variable) although, as Alan Robock said, you can't really get much
> information about the diurnal cycle from 6-hourly data.
>
> Doug
>
>
> From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org]
> On Behalf Of Mubashar Dogar
> Sent: 08 March 2011 13:33
> To: gradsusr at gradsusr.org
> Subject: [gradsusr] diurnal average
>
> Dear? gradusers,
>
> I am interested to see the diurnal averages of surface temperature over
> saudi arabia. Actually I have 22 years 'ERA Int' data having 4 time steps in
> each day (6 hourly). I would like to calculate diurnal mean cycle such that
> I left with only 4 points to see on the graph. How to check it in grads.
>
> Regards,
>
> Mubashar
>
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