[RegCNET] Fw: [CORDEX] Precipitation output definition

[bixq]

Hi, Simon:

Yes, the simplest way is to output ATM, and RAD every 3 hour.

Probably we should add one option especially for CORDEX output in RegCM4,
like output the cloudness (high, middle, and low cloud) for CORDEX.

I have just read roughly the output requirement in CORDEX document last 
month. I think we should add one option for CORDEX.

Regards,
Xunqiang Bi

On Tue, 27 Jul 2010, Simon Krichak wrote:

> 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
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> CORDEX mailing list
>>> CORDEX at mesonet.agron.iastate.edu
>>> http://*mesonet.agron.iastate.edu/mailman/listinfo/cordex
>>> 
>>> 
>> _______________________________________________
>> CORDEX mailing list
>> CORDEX at mesonet.agron.iastate.edu
>> http://mesonet.agron.iastate.edu/mailman/listinfo/cordex
>
>
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Dr. Xunqiang Bi         email:bixq at ictp.it
   Earth System Physics Group
   The Abdus Salam ICTP
   Strada Costiera, 11
   P.O. BOX 586, 34100 Trieste, ITALY
   Tel: +39-040-2240302  Fax: +39-040-2240449
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~