[RegCNET] A puzzle

[Ashraf Zakey]

Hi Yanlb,

Here is my answer.

On Tuesday 17 February 2009 3:14:05 pm Yanlb wrote:
> Hi, Dear experts,
> I have several puzzles about RegCM-DUST, I expect for your help.
> 1,
> When run regcm with aerosol or dust,
> if the setting is right?
> ntr=1;nbin=1    c              ! 'AER00D0': Neither aerosol, nor dust used;
> ntr=4;nbin=1    c              ! 'AER01D0', Biomass, SO2 + BC + OC, no
> dust; ntr=4;nbin=1    c              ! 'AER10D0', Anthropogenic, SO2 + BC +
> OC, no dust; ntr=4;nbin=1    c              ! 'AER11D0',
> Anthropogenic+Biomass, SO2 + BC + OC, no dust; ntr=1;nbin=4    c           
>   ! 'AER00D1', No aerosol   , with dust; ntr=4;nbin=4    c              !
> 'AER01D1', Biomass, SO2 + BC + OC, with dust; ntr=4;nbin=4    c            
>  ! 'AER10D1', Anthropogenic, SO2 + BC + OC, with dust; ntr=4;nbin=4    c   
>           ! 'AER11D1', Anthropogenic+Biomass, SO2 + BC + OC, with dust. In
> fact, I have no idea about "ntr", how to set it?

ntr is the total number of aerosols, and nbin is the number of dust size-bin. 
for example if you are using all the aerosols and sulfur dioxide then ntr= 10 
and nbin=4. If you using only aerosols then ntr=6 and you should set 
the 'dustbsize' in 'regcm.in' into one size only and then 'nbin=1'. If you 
using only dust then put ntr=4 and nbin=4 .... etc.



> 2,
> And how to set "chtrname" in the file "regcm.in" respectively for each
> case? 3,

Chtrname is the aerosol name it can be 'DUST', or 'SO2', or 'SO4' ...... etc
For example for 10 aerosols and sulfur dioxide:

ntr=10
nbin=4

chtrname 
= 'SO2','SO4','BC_HB','BC_HL','OC_HB','OC_HL','DUST','DUST','DUST','DUST',
dustbsiz  =  0.01, 1.00, 2.50, 5.00, 1.00, 2.50, 5.00,20.00,

For 6 aerosols  without dust it can be :
ntr=6
nbin=1
chtrname  =    'SO2','SO4','BC_HB','BC_HL','OC_HB','OC_HL',
dustbsiz  =  0.01, 1.00,

For Dust it can be:

ntr=4
nbin=4
chtrname  =    'DUST','DUST','DUST','DUST', : 
dustbsiz  =  0.01, 1.00, 2.50, 5.00, 1.00, 2.50, 5.00,20.00,


> When run RegCM with aerosol or dust, is the follow step right?
> 1, datalinker.x     as usual
> 2, terrain.x     as usual
> 3, icbc.x     as usual
> 4, modify RegCM/Main/parame file as above
> 5, copy corresponding regcm.in_* file to case file folder
> 6, copy regcm.x
> 7, regcm.x    as usual
> ...

Yes, if you set everything correctly the procedure is the same.


>
> I am sincerely waiting for your reply in details.
>
> Yours fan,
> Libin Yan
>
> 2009-02-17
>
>
>
> Yanlb



Thanks,
Ashraf Zakey

Dr. Ashraf Zakey, 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                                               
e-mail: azakey at ictp.it