How to add a choice of tracer in the code

[linlu9876]

Hello all,

I wish to use the tracer option in WRF-Chem. I am using the default tracers for now using option tracer_opt = 3.
But I am confused does this option also include CO Tracer as seen here ACOM Forecasts for FIREX-AQ: Tracers ?

I can see tr17_1 to tr17_8 but how to get CO tracer from biomass burning or aerosol like organic carbon ?
How to modify the code to output this? Please help.

Also, what is meant by the output 'fire_smoke' in the wrfout file? How can I find more info about this output?

Thanks
Lin