[MITgcm-support] switch to turn off advection

[Jean-Michel Campin]

Hi Yu-Kun,

If you want to turn off the advection for a particular (passive) tracer,
for instance the third one, you can select the advection scheme zero: 
 PTRACERS_advScheme(3)=0,
and this will disable the advection, keeping just forcing and diffusion.

This feature was not part of the original pkg/ptracer and is not 
(well) documented.

Cheers,
Jean-Michel

On Wed, Nov 22, 2017 at 03:39:57PM +0800, ?????? wrote:
> Hi all,
> 
> 
> I use MITgcm to solve the general advection-diffusion problem for a passive tracer.  Now I want to turn off the advection, just to diffuse the passive tracer without any advection.  I wonder if there is a switch (in ptracer pkg) that could turn off the advection.
> 
> 
> I've noticed that there are such switches for active tracers of temp and salt in data file as tempAdvection/saltAdvection.  So I guess there could be a similar switch for ptracer or, at least not difficult to do that.
> 
> 
> ------------------
>  Best regards 
>  
> Yu-Kun Qian (??????) 
> Center for Monsoon and Environment Research 
>  Department of Atmospheric Sciences
> School of Environmental Science and Engineering 
>  Sun Yat-sen University 
> No. 135 Xingang West Road, Haizhu District 
> Guangzhou, 510275, P.R. China 
> Tel; 020-84115227 
> Email: qianyk at mail3.sysu.edu.cn

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