Hi Beatrice,
 
If your output frequency is 6hr, 
 
For Jan, Mar, May, Jury, Agu, Oct, Dec: precipitation of a month=(ave(tpr,t=1,t=124))*31
 
For Feb: precipitation of a month=(ave(tpr,t=1,t=112 or 116))*28 (or 29)

For others:  precipitation of a month=(ave(tpr,t=1,t=120))*30
 
Best regards,
Zhang
 
 
 
----- Original Message -----
From: Béatrice Morel
To: regcnet@lists.ictp.it
Sent: Sunday, March 08, 2009 2:24 PM
Subject: [RegCNET] Total precipitation

Dear All,
 
In files of ATM and SRF, precipitation is given in units of mm/day. Is it then the rate or total amount of one time step?

What should I do if I want to have total precipitation of a month (in units of mm).
 
Many thanks by advance for your reply.

With best regards
 
Beatrice


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