On 01/16/2013 02:17 PM, James Ciarlo` wrote:

On 16 January 2013 13:49, Graziano Giuliani <ggiulian@ictp.it> wrote:

On 01/16/2013 09:11 AM, James Ciarlo` wrote:
[...]

[...]
Ok in this case I made the mistake of thinking that the variable was

ifchem, I'll re-run the simulation

[...]

James,

those are two distinct flags. One enables the transport and radiative effects from tracers (ichem), the other enables the creation of an output file with the tracer concentrations (ifchem). You may be interested to just consider dust effects, without requesting the model to output the tri-dimensional mixing ratios of all tracers, and you can do that setting ichem = 1 and ifchem = .false. You set ifchem = .true. if you want the model to output also those concentrations. BUT if you disable the transport and effects from tracers (ichem=0), then the model prevents the creation of the empty output file.

Graziano.

--
Graziano Giuliani - Earth System Physics Section
The Abdus Salam International Centre for Theoretical Physics
Strada Costiera, 11 - I - 34151 Trieste Italy