[RegCNET] Help!

[Ashraf Zakey]

Dear Su,
    No fc and chtrsol are not equal and not the same factor. chtrsol is 
something like the fraction of tracer by wet removal .  Yes, the present 
version of RegCM doesn't include the indirect effect of aerosol.


Best regards,
Ashraf


suxingtao at sina.com wrote:
>
> Hi Ashraf,Bi and RegCM3 users,
>
>  
>
>   Now I am very interested in the simulation of dust aerosol over East 
> Asia with RegCM3 model. I have got much information about dust 
> simulation from reading some papers (e.g. “Implementation and testing 
> of a desert dust module in a regional climate model”,ACP,2006). Also, 
> there are some questions which I want to ask you for help.
>
>   In the paper, I know the parameter of fc is the fraction of aerosol 
> assumed to be incorporated in cloud droplets. The fc of 4 transport 
> bin sizes are as follows: 0.3, 0.15, 0.05, 0.05. Is fc the same to 
> chtrsol which is in regcm.in file. If so, why they differ greatly from 
> regcm.in_4dust file which are set to 0.5 0.6 0.7 0.8?
>
>   As far as I know, the present version of RegCM3 model doesn’t 
> include the indirect effect of aerosol. My thought is as follows: the 
> experiment (chtrsol are set to 0) is as the sensitivity experiment, 
> and the experiment (chtrsol don’t change)is as the control experiment, 
> can the difference (control-sensitivity) be thought to indirect effect 
> of aerosol?
>
>   I will appreciate any help.
>
>  
>
> Best regards,
>
> Su
>
>  
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