Hi Rajesh,<br />
You are doing right thing but the easy way is to make the time average at first and than area average.<br />
Ex:<br />
rain = ave(tpr, t=1, t=240)<br />
rain1=  aave(rain, lon=90, lon=93, lat=20, lat=23)<br />
<br />
This is your desired average rainfall. You can multiply with 240 in the first line to get the total rainfall.<br />
<br />
Thanks.<br />
Satyaban<br />
<br />
On Thu, 26 Aug 2010 15:55:06 +0530  wrote<br />
>Hello All,<br />
 <br />
I have divided India into 31 parts like 20-23N & 90-93E so on... I need pricipitation (tpr) over all 31 parts.<br />
Below are the log that I am using on grads to find out precipitation for all 31 parts.<br />
After wrinting this command we got 240 value and then I sum the all 240 value to get monthly precipitation value.<br />
 <br />
ga-> open SRF.2009090100.ctl <br />
Scanning description file:  SRF.2009090100.ctl<br />
Data file SRF.2009090100 is open as file 1<br />
LON set to 49.4242 111.019 <br />
LAT set to -10.48 39.77 <br />
LEV set to 1008.43 1008.43 <br />
<br />
Time values set: 2009:9:1:3 2009:9:1:3 <br />
E set to 1 1 <br />
ga-> set t 1 240<br />
Time values set: 2009:9:1:3 2009:10:1:0 <br />
ga-> d tloop(aave(tpr,lon=90,lon=93,lat=20,lat=23))<br />
 <br />
Here my question is , whether I am using right path to calculate the precipitation value.<br />
 <br />
Please reply as soon as possible<br />
  <br />
 <br />
-- <br />
Rajesh Kumar Maurya<br />
M.Sc(Tech)- Geophysics(Meteorology); Junior Research Fellow & Research Scholar<br />
Department of Geophysics<br />
Banaras Hindu University<br />
Varanasi 221005<br />
<br />
<br />
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<br><br>-------------------------------------------------------------------------------<br />
Dr. Satyaban Bishoyi Ratna<br />
Computational Atmospheric Sciences Team<br />
Scientific & Engineering Computing Group<br />
Centre for Development of Advanced Computing (C-DAC)<br />
Pune University Campus, Ganeshkhind<br />
Pune - 411 007, Maharashtra, India<br />
E-mail: satyabanb@cdac.in<br />
Tel (O): +91-020-2570 4226,  (Cell): +91-094223 56326<br />
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