[Wrf-users] Re: Wrf-users Digest, Vol 33, Issue 4

[wrfhelp]

Can you quantify your cold bias? Does the model start with the right  
low level
and surface temperatures (e.g. TSK)? If you use a LSM option, do you  
have the
right soil temp and moisture?

wrfhelp

On May 11, 2007, at 12:00 PM, wrf-users-request at ucar.edu wrote:

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> Today's Topics:
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>    1. Albedo  ( Juan Jos? Ruiz )
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>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 11 May 2007 13:48:35 -0300 (ART)
> From: " Juan Jos? Ruiz " <jruiz at cima.fcen.uba.ar>
> Subject: [Wrf-users] Albedo
> To: <wrf-users at ucar.edu>
> Message-ID:
> 	<1236.157.92.28.195.1178902115.squirrel at www.cima.fcen.uba.ar>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi, my name is Juan Ruiz. We have been using WRF for short range  
> forecast
> and in some research experiments over South America. We have  
> experienced
> some problems with the PBL temperatures. They are usually too low. The
> cold bias at low levels is present with YSU, Mellor and Yamada  
> squemes and
> also with the Noah and RUC LSM.
> I have two questions:
> 1) Does anybody knows what might have been producing this cold bias  
> in WRF?
> 2) Some of the test that we planned include changing the surface  
> albedo.
> There are specification of the albedo as a function of LANDUSE in
> LANDUSE.TBL and also monthly mean albedo fields included in the static
> files. How is the albedo computed in WRF? Which of this fields /  
> tables
> should be modified to perform a sensitivity test?
> Thanks a lot in advance for your help!
> Best regards.
> Juan Ruiz.
>
>
>
>
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> End of Wrf-users Digest, Vol 33, Issue 4
> ****************************************