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WRF-Chem offline chemistry

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New member
Hello everyone,

I would appreciate if you could answer my question about WRF-Chem
offline mode.
I plan to run WRF-Chem without feedback from chemistry on meteorology
(offline). I also have read some documents that compare WRF-Chem
online and offline modes (e.g.
However, I don't know how can I change WRF-Chem from default (online) to offline mode.
Does anyone have any idea how can I do that? I would appreciate if
you can share a sample namelist for this case too.
Thank you in advance.

WRF-Chem is always online (meteorology and chemistry are simulated within the same modeling framework). The chemistry feedback is turned on by setting the option "aer_ra_feedback".
Thank you for the explanation. In this case I'm not sure if the off-line mode is helpful for my case. Please let me clarify what I plan to do. I want to simulate "radiative effect" of aerosols (I know how to do this part). However, I don't want to have any feedback from the calculated "radiative effect" on meteorological parameters such as temperature. Can you please let me know if it is possible in WRF-Chem?