[Wrf-users] Re: Wrf-users Digest, Vol 43, Issue 9

[wrfhelp]

Some of this might be related to stable boundary issue noted in YSU  
scheme. V3 will address some of that.

wrfhelp

On Mar 12, 2008, at 12:00 PM, wrf-users-request at ucar.edu wrote:

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> Today's Topics:
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>    1. WRF YSU-scheme PBL Heights (David Ovens)
>    2. Re: WRF YSU-scheme PBL Heights (Sen Chiao)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 11 Mar 2008 14:40:48 -0700
> From: David Ovens <ovens at atmos.washington.edu>
> Subject: [Wrf-users] WRF YSU-scheme PBL Heights
> To: wrf-users at ucar.edu
> Message-ID: <20080311214048.GF1899 at frosty.atmos.washington.edu>
> Content-Type: text/plain; charset=us-ascii
>
>
> Hello,
>
> Is anyone out there calculating their own PBL heights for the WRF YSU
> scheme?  As you could see on any of these loops
>
> http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?wrfd2_pblht 
> +/3/72/3
>
> the PBLH field is way too low, < 50 m, much of the time in many
> locations.  Notice in the following loop,
>
> http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?wrfd2_pblht 
> +2008031112/12/15/1
>
> the abrupt change in PBLH from 5 pm to 8 pm over the land.
>
> Thanks.
>
> David
> --
> David Ovens		 e-mail: ovens at atmos.washington.edu
> Research Meteorologist    phone: (206) 685-8108
> Dept of Atm. Sciences      plan: Real-time MM5 forecasting for the
> Box 351640                        Pacific Northwest
> University of Washington          http://www.atmos.washington.edu/ 
> mm5rt
> Seattle, WA  98195               Weather Graphics and Loops
>                                   http://www.atmos.washington.edu/ 
> ~ovens/loops
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 11 Mar 2008 17:51:47 -0400
> From: Sen Chiao <schiao at fit.edu>
> Subject: Re: [Wrf-users] WRF YSU-scheme PBL Heights
> To: David Ovens <ovens at atmos.washington.edu>
> Cc: wrf-users at ucar.edu
> Message-ID: <6ED98441-C791-4658-BF1D-A705CAAE9ECB at fit.edu>
> Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
>
> David,
>
> I did find this problem in wrfv2.1. I got negative pbl height!
> The thermal profile is the key factor. That's why when you see the
> abrupt change from 5 to 8, i.e., cooling after sunset.
>
>
> SC
>
>
> On Mar 11, 2008, at 5:40 PM, David Ovens wrote:
>
>>
>> Hello,
>>
>> Is anyone out there calculating their own PBL heights for the WRF YSU
>> scheme?  As you could see on any of these loops
>>
>> http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?wrfd2_pblht
>> +/3/72/3
>>
>> the PBLH field is way too low, < 50 m, much of the time in many
>> locations.  Notice in the following loop,
>>
>> http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?wrfd2_pblht
>> +2008031112/12/15/1
>>
>> the abrupt change in PBLH from 5 pm to 8 pm over the land.
>>
>> Thanks.
>>
>> David
>> --
>> David Ovens		 e-mail: ovens at atmos.washington.edu
>> Research Meteorologist    phone: (206) 685-8108
>> Dept of Atm. Sciences      plan: Real-time MM5 forecasting for the
>> Box 351640                        Pacific Northwest
>> University of Washington          http://www.atmos.washington.edu/
>> mm5rt
>> Seattle, WA  98195               Weather Graphics and Loops
>>                                   http://www.atmos.washington.edu/
>> ~ovens/loops
>> _______________________________________________
>> Wrf-users mailing list
>> Wrf-users at ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/wrf-users
>
>
>
> --
> Sen Chiao, Ph.D., Assistant Professor
> Marine and Environmental Systems
> Florida Tech, 150 W. University Blvd, Melbourne, FL 32901
> 321.674.8008 (O) http://my.fit.edu/~schiao
>
>
>
>
>
>
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> End of Wrf-users Digest, Vol 43, Issue 9
> ****************************************