Regarding the Chem_opt=202 and mozart_ph_diag = 1

[Jaydeep Singh]

Dear All, 

wrf.exe crashes after a few hours of starting with WRF4.4.2 or with another version above WRF4.2.2. While working smoothly with MOZCART. 

If found a solution to this issue in the WRF forum

(1) Possible Bug with MOZART-MOSAIC scheme while writing output | WRF & MPAS-A Support Forum (ucar.edu)

https://forum.mmm.ucar.edu/threads/possible-bug-with-mozart-mosaic-scheme-while-writing-output.12438/

This thread has suggested setting mozart_ph_diag = 1 in the chem section, and Interestingly model is running without any problem.

Is it a good way to set this option for further use?  

Regards 

Jaydeep

[Mary Barth]

Jaydeep,

That option turns on the ability to output the pH of the aerosols and cloud water. It must be set or wrf.exe doesn't work. Since chem_opt=202 includes aerosols and cloud water, then you can use the output or not.

This diagnostic was developed for results shown in Pye et al. (2020) ACP.

- Mary

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Mary Barth                                Phone:  303-497-8186
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National Center for Atmospheric Research                        
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