[Mitgcm-support] Re: passive tracers

[mitgcm-support at dev.mitgcm.org]

Hello Fabiana,

> I'm using your MITgcm for a oceanographic study. I wonder how passive
> tracers work and how I can use the option "ALLOW_PASSIVE_TRACER"; should I
> insert it in the CPP_OPTIONS.h?    

You need to have:
#define ALLOW_PASSIVE_TRACER
in CPP_OPTIONS.h

and run the model with 
tr1Stepping=.TRUE.,
in file "data", namelist "PARM01" 
(see e.g. verification/carbon/input/data)

Note that the passive tracer code is still in progress
and we are working on making this option fully compatible 
with all others.

Jean-Michel

NB:  In verification/global_ocean.90x40x15/input/data
tr1Stepping=.TRUE., is a mistake and does not mean that
this experiment is running with a passive tracer.