[RegCNET] Fw: [CORDEX] Precipitation output definition

[Simon Krichak]

Hi Xunqiang and all,

As I understand the only possibility for us to have the averaged 3-hour data 
is to save model results every hour and not only once per 3 hour time as 
most of us do. This may be too space consuming. What do you recommend us to 
do to be able to create the necessary data for CORDEX?

Best regards,
Simon




----- Original Message ----- 
From: "Karl Taylor" <taylor13 at llnl.gov>
To: "Burkhardt Rockel" <rockel at me.com>
Cc: "Martina Schubert" <martina.schubert at zmaw.de>; 
<cordex at mesonet.agron.iastate.edu>
Sent: Monday, July 26, 2010 9:51 PM
Subject: Re: [CORDEX] Precipitation output definition


> Dear all,
>
> I'm not sure whether it was always this way, but for CMIP5 the
> specification for 3-hourly data is:
>
> "All fields are saved on the atmospheric grid.  Precipitation, clouds,
> and all flux variables are averaged over 3-hour intervals (0-3Z, 3-6Z,
> 6-9Z, 9-12Z, 12-15Z, 15-18Z, 18-21Z, 21-24Z).  All other fields are
> sampled synoptically at 0Z, 3Z, 6Z, 9Z, 12Z, 15Z, 18Z, and 21Z."
>
> Best regards,
> Karl
>
> On 7/26/10 6:33 AM, Burkhardt Rockel wrote:
>> In the "cordex_archive.pdf" document the precipitation is defined as a
>> mean over the time interval for "Core" and "Tier 1" (units kg m-2 s-1).
>> For Tier 2 group1 (3hourly output) it says
>> "State variables should be instantaneous, fluxes as accumulations.
>> Instantaneous = 1,5,6,7,8 and accumulations=4,10,11-17"
>> This means that precipitation will change its the units to (kg m-2) in
>> this case. Is this really meant here? Or should it be the mean over
>> the 3 hours (units kg m-2 s-1)?
>>
>> Regards
>> Burkhardt
>>
>>
>>
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>>
>>
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