[RegCNET] A puzzle

[XUNQIANG BI]

Hi, Yan:

On Tue, 17 Feb 2009, 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 number of tracers (could be up to 10 in the web version).

> 2,
> And how to set "chtrname" in the file "regcm.in" respectively for each case?
Well, you cannot use the terms of your own. The chtrname can only be one 
of the folloning

'SO2','SO4','BC_HB','BC_HL','OC_HB','OC_HL','DUST','DUST','DUST','DUST',

For dust, usually, you should use run with the four dust bins, so use
'DUST','DUST','DUST','DUST'

The sequence of "chtrname" name decides the sequence of tracers.

> 3,
> When run RegCM with aerosol or dust, is the follow step right?
> 1, datalinker.x     as usual
> 2, terrain.x     as usual

You should set the appropriate AERTYP before run the terrain step.

> 3, icbc.x     as usual
> 4, modify RegCM/Main/parame file as above
> 5, copy corresponding regcm.in_* file to case file folder

Yes, then change the idate0, idate1, and idate2

And set appropriate idirect, ichem

> 6, copy regcm.x

> 7, regcm.x    as usual
> ...
>
> I am sincerely waiting for your reply in details.
>
> Yours fan,
> Libin Yan
>
> 2009-02-17
>
>
>
> Yanlb
>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Dr. Xunqiang Bi         email:bixq at ictp.it
   Earth System Physics Group
   The Abdus Salam ICTP
   Strada Costiera, 11
   P.O. BOX 586, 34100 Trieste, ITALY
   Tel: +39-040-2240302  Fax: +39-040-2240449
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