[gradsusr] daily anomaly

[Balachandrudu Narapusetty]

Hi Dr. Sujata,

I am happy to see somebody has same problem that I had some time ago. I solved it by estimating the climatology (and thereafter anomalies) using few harmonics. 

I am sure this article is useful in dealing with your problem:

Narapusetty, Balachandrudu, Timothy DelSole, Michael K. Tippett, 2009: Optimal Estimation of the Climatological Mean. J. Climate, 22, 4845–4859. doi: http://dx.doi.org/10.1175/2009JCLI2944.1 

I am happy to provide further assistance if you have questions. 

Best regards,
Bala


----- Original Message -----
From: Sujata Mandke <amin at tropmet.res.in>
Date: Thursday, September 6, 2012 7:24 am
Subject: [gradsusr] daily anomaly

> Dear Grads Users
>    I wish to calculate daily OLR anomaly from
>  the following datasets.
>    I have daily OLR data (netcdf) for the period
>   1Jun1974-31May2012. Also long term daily OLR
>   climatology (netcdf) data for 365 days.
> 
>   As such writting script for calculating daily
>  anomaly is very simple. But how to tackle following
>    two problems while calculating anomaly
> 
> (i) Actual data is on Gregorian(real) calendar
>    and thus has data for 366 days in leap years.
> (ii) What to do with missing values?
> 
> Does anybody has grads script to calculate daily 
> anomaly by taking care of above two problems.
> Regards
> Dr. Sujata Mandke,Scientist,
> IITM,PUNE-8,INDIA.
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