[RegCNET] ask for help for Aerosol problem !!

[XUNQIANG BI]

Hi, Li:

On Mon, 9 Jul 2007 ljy_926 at 126.com wrote:

>   Now I have some problems with AEROSOL, I expect to get your help.
>
>  (1) I want to make experiment only with dust, no aerosol. My ways is as follow:
>     set AERTYP='AER00D1' in domain.param
>     run './terrain.x' and './icbc.x'
>
>     But 'AERO.ctl' and 'AERO.dat' are not produced in '../Input'.

No problem, AERO.dat holds aerosol emission. If just run DUST, it just
need the soil texture category in DOMAIN.INFO.

>     I set 'ntr=4' and 'nbin=4' in 'parame'

Correct !

>       mv  ../Commons/regcm.in_4dust  ../PracticeRun/regcm.in
>       cp  ../Commons/regcm.x ../PracticeRun/.
>
>     I change 'idat0','idat1' and 'idat2' in 'regcm.in' accordingly.

Correct !

>     But There isn't '/bin/ln -sf ../Input/AERO.dat AERO.dat' in regcm.x, so I doubt if RegCM3 run only with dust, no aerosol.

No problem. 
>
>     Is my ways right ? And why I should set 'chtrname'='dust','dust','dust','dust' ? If I only set 'chtrname'='dust', is it right ?

Should be 'DUST' (not 'dust'), here 'DUST' is the tracer name, since there
are 4 size bins of dust, you should have 4 'DUST',
>
>  (2)  I have some doubts about how to set 'ntr' and 'nbin' in 'parame' all the time.  When I set AERTYP='AER01D0' or 'AER10D0' or 'AER11D0' or 'AER01D1' or 'AER10D1' or 'AER11D1',  I set 'ntr=6' and 'nbin=4' in the same way.
>    Is my ways right ?

It's correct to set ntr=4 and nbin=4 for this case.
>
>  (3)  How to decide to use 'regcm.in_4dust' or 'regcm.in_6aerosol' or 'regcm.in_10areosol' ?

regcm.in_4dust is prepared for running exp. with dust, no aerosol.
regcm.in_6aerosol                           no   dust, with 6 aerosol
regcm.in_10areosol                          with dust, with 6 aerosol

>       Can 'chtrname' in 'regcm.in' be changed ?

No, you can reduce some, but not change the name.

> If can, how to change it ?
>       If I make experiment only with 'BC' or 'SO2',  I set 'chtrname'='BC' or 'SO2'. Is it right ?

You can use 'SO2', but not OK for 'BC' (For black carbon, the names in 
code are 'BC_HB' and 'BC_HL'; For organic carbon, 'OC_HB' and 'OC_HL')

The code will not understand the 'BC' and 'OC'.

Usually, the experiment is like:

'SO2' and 'SO4'  (It seldom just run 'SO2' only, because the icteraction 
between 'SO2' and 'SO4')

'BC_HB' and 'BC_HL'

'OC_HB' and 'OC_HL'

It's not good to design an experiment of just 'OC_HB', or just 'BC_HL'. 
>
>  (4)  what means is it when I set 'nbin=4' in 'parame' ?

For any experiments with dust, you must set nbin=4.

If you run experiment without dust, then you can set nbin=1, then
you need change the regcm.in accordingly.

Are you clear ?

Regards,
Bi Xunqiang