[RegCNET] Re：Re:__about_snow_cover_in_dust_module

[suxingtao at sina.com]

Dear Fabien,
Thank you very much for your kind reply. Now I have another question to ask you for help. In present RegCM4.1.1 model, sigma2=1.2D0 on line 50 in mod_dust.F90. But it's 1.6 in the paper of Zake A S, et al., Atmos. Chem. Phys., which entitled "Implementation and testing of a desert dust module in a regional climate model". Which value is right?
 
Best regards,
Su

----- 原始邮件 -----
发件人：Solmon Fabien <fsolmon at ictp.it>
收件人：regcnet at lists.ictp.it
主题：Re: [RegCNET] Re：Re:__about_snow_cover_in_dust_module
日期：2011-8-4 20:57:17

Hello

Inhibition of dust emission by snow cover is not activated properly in
regcm4.1 . There is a commented line in the dust emission routine when
fluxes are aggregated form the texture to the gridscale level that
account for grid snow cover. The snow cover ( or snow mask ) variable
should be passed by argument from the emission driver routine : be
carefull we cannot use directly module variable because dust routine are
called on a 'reduced grid' containing only desert and semi desert point.
An other option is to wait for the next bugfix release , for which we
will activate this option . Sorry about that.

Fabien


On 08/04/2011 06:47 AM, suxingtao at sina.com wrote:
>
> Thanks very much for your kind reply, but I still have some doubts.
> For example, is dust-emssion still occurs on deserts or semi-deserts
> with snow covered in winter? Is the effect of snow considered in dust
> emission sheme? Thanks a lot again.
>
> Su
>
>
> ----- 原始邮件 -----
> 发件人：Mirkana Degenie <mirkanag at yahoo.com>
> 收件人：suxingtao at sina.com
> 主题：Re: [RegCNET] about snow cover in dust module
> 日期：2011-8-4 04:13:12
>
> Dust is emitted from desert and semidesert(in the newer versions)
> areas. If the land cover is other than these, there is no dust
> emission, if I get your point...
>
>
>
> ------------------------------------------------------------------------
> *From:* "suxingtao at sina.com" <suxingtao at sina.com>
> *To:* RegCM讨论区 <regcnet at lists.ictp.it>
> *Sent:* Tue, August 2, 2011 9:28:02 PM
> *Subject:* [RegCNET] about snow cover in dust module
>
> Dear all friends,
>
> I am sorry to take your time, but I want to know if the impact of snow
> cover is considered in dust emission module in present RegCM4.1.1
> model.Thanks very much in advance.
>
> Su
>
> Nanjing,China
>
>
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> RegCNET at lists.ictp.it
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