Total precipitation data

[Todd MItchell]

HI David,

Good for you for comparing the INTERIM and observed data.  Since you 
have observed data, why don't you just
use that?  What temporal and spatial resolution do you need the 
precipitation data for?

Todd Mitchell

Wednesday 31 March 2010

Tononi Davide wrote:
> Dear grads user.
>  
> I´m Davide Tononi and i'm doing some research about moisture on 
> structure. For that i need the precipitation data for some cities in 
> different part of Europe.
> For the data of precipitation i download from the web page: 
> _http://data-portal.ecmwf.int/data/d/interim_daily_ the data of total 
> precipitation.
> This data are every 12 hours so 2 times for day and is the sum of the 
> 12 previous hours.
> I've tried to compare this data, downloaded with step 3, with the data 
> of metereological observation and the situation is like this:
>   	city 	Average temperature [ºC] 	Average RH [%] 	Annual 
> precipitation from INTERIM [mm] 	Annual precipitation [mm] from 
> observation
> B 	Florence 	13.7 	76 	386 	920
> C 	Helsinki 	6.3 	83 	293 	653
>
> Do you know how is possible this difference?
> I've tried also to download the data with step 6 and in this case for 
> the city of helsinki the situation change but now is bigger than in 
> the real situation.
>   	city 	Average temperature [ºC] 	Average RH [%] 	Annual 
> precipitation from INTERIM [mm] 	Annual precipitation [mm] from 
> observation
> C 	Helsinki 	6.3 	83 	1380 	653
>
> And if i sum al the precipitation for 10 years for different cities in 
> Europe the sum are very close each other for different cities.
>  
> So some of you can explain to me the meaning of the step? Some of you 
> have already use that data and can explain better how is the meaning 
> of this total precipitation?
>  
> Thank you so much
> Best regards
>  
> Davide Tononi
> VTT researcher
>  


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