[RegCNET] Re：Re: About the vertical concentration distribution of aerosol?

[suxingtao at sina.com]

Dear Ashraf,
Thanks for your email. From your help, I think the concentration of aerosol is calculated as followes:
Trac is the mixing ratio of aerosol in CHE* files. Is it the quality ratio of aerosol to dry air? if it is, and C is the concentration of aerosol, D is the dentisity of dry air, then
Trac=C/D,and D=P/RT,so C=P*Trac/RT. P is the pressure, R is the dry air gas constant, T is the temperature and it is the output in ATM* files. And Trac,P,T are in the same level.
Is my understanding right?
Thanks very much once again!
 
With my best wishes,
Su
 
 

----- 原始邮件 -----
发件人：Zakey Ashraf_Saber <azakey at ictp.it>he
收件人：suxingtao at sina.com
主题：Re: [RegCNET] About the vertical concentration distribution of aerosol?
日期：2010-3-9 17:28:59

Dear Su,
The vertical mixing ratio is exist in the output and simply you can
convert it to mass concentration. The variable is called tracer mixing
ratio and it is in kg/kg in CHEM* files



With my best wishes,
Ashraf

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! Dr. Ashraf Zakey, Visiting Research Scientist !
! Earth System Physics (ESP) !
! Physics of Weather and Climate Section (PWC) !
! The Abdus Salam International Centre for Theoretical Physics!
! P.O. BOX 586, (Strada Costiera 11 for courier mail) !
! 34100 Trieste, ITALY !
! Phone: + 39 040 2240 385 !
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! e-mail: azakey at ictp.it !
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> Dear Ashraf and RegCM3 users,
> Thanks very much for your email of Mar. 4th. I have got the answer to my
> question.
> Now I have another question to ask you for help. How can I get the
> vertical concentration distribution of aerosol? It seems that there isn't
> direct output of vertical concentration distribution of aerosol in CHE*
> file. There is only the column burden of aerosol.
> Thanks very much in advance!
> 
> Best wishes,
> Su 
> 
> 
> 
> ----- 原始邮件 -----
> 发件人：Zakey Ashraf_Saber <azakey at ictp.it>
> 收件人：suxingtao at sina.com
> 主题：Re: [RegCNET] How to calculate the AOD of dust aerosol?
> 日期：2010-3-4 20:29:47
>
> Dear Su,
>
> Yes, AOD is the column integration of (ext) variable in CHE* file. IF
> you used the dust option in RegCM, then you will get the ext* variable
> in CHE* which represent the dust. But, if you used more aerosols +
> dust, then ext* will be respresented all of the selected aerosols.
>
>
> With my best wishes,
> Ashraf
>
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> ! Dr. Ashraf Zakey, Visiting Research Scientist !
> ! Earth System Physics (ESP) !
> ! Physics of Weather and Climate Section (PWC) !
> ! The Abdus Salam International Centre for Theoretical Physics!
> ! P.O. BOX 586, (Strada Costiera 11 for courier mail) !
> ! 34100 Trieste, ITALY !
> ! Phone: + 39 040 2240 385 !
> ! Fax: + 39 040 2240 449 (or + 39 040 224 163) !
> ! e-mail: azakey at ictp.it !
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>
>
>> Dear Ashraf and RegCM3 users,
>> I want to simulate dust aerosol in East Asia. But I don't know how to
>> calculate the AOD of dust aerosol. Are the parameters (used to
>> calculate the AOD) in CHE file? How to calculate the AOD with these
>> parameters?
>> Could you give me some help?
>> Thanks very much in advance.
>> 
>> Best regards,
>> Su_______________________________________________
>> RegCNET mailing list
>> RegCNET at lists.ictp.it
>> https://lists.ictp.it/mailman/listinfo/regcnet
>
>
> --
>
>
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