Significantly low PM10 concentration + shifted simulated ozone peak

Alice Burton

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Mar 19, 2024, 7:21:18 AMMar 19

to wrf-chem-anthro_emiss

Hi every one,

I am running WRF-chem version 4.5.2 with chem option 202. I used dust option 13 which is compatible for this option, but I noticed the simulated PM10 concentration is significantly low and unreasonable. So I need your help and advise to remove this issue.

To generate anthropogenic emission files I used edgard 2015, used mozbc for IC/BC using WACCM data.

I also noticed simulated ozone peak happened before observed peak, and I wonder why this happened (check the attached). And how can I fix it please?

I attached my namelist.input anthropogenic and mozbc script. Would you please check them. I guess there are some mistakes in equations specially PM10. Should I change any of equations please? If so, could you please inform me.

Look forward to hearing from you.

Thanks

pm10.png

anthro-emission.txt

namelist.input.txt

mozbc.txt

Screen Shot 1402-12-29 at 14.17.47.png

Mary Barth

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Mar 19, 2024, 10:49:10 AMMar 19

to Alice Burton, wrf-chem-anthro_emiss

Hi Alice,

My colleague and I noticed two things in your namelist.input file. It appears that the wrfchemi files may not be getting read because the line is commented out in your namelist. Of course you can confirm this by looking at your rsl.out.0000 file to see if wrfchemi files are being read.

You are using option 202 but you have GOCART background fields being read. I don't know what this does, but I suggest not reading GOCART fields as you are using MOSAIC aerosol scheme.

Regarding ozone, whenever I see a time shift I check to make sure the model output and observations are on the same time zone. Often observations are in local time but WRF is using UTC time. It could also be caused by the lack of anthropogenic emissions.

- Mary

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Mary Barth

Senior Scientist

phone: 303-497-8186 email: bar...@ucar.edu

NSF - National Center for Atmospheric Research

P.O. Box 3000

Boulder, CO 80307

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Mary Barth

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Mar 19, 2024, 2:41:56 PMMar 19

to Alice Burton, wrf-chem-anthro_emiss

Hi Alice,

I do not see anything obviously wrong in the anthro_emis.inp . However, I recommend viewing the wrfchemi file data and comparing it to the EDGAR emissions inventory to see if they look the same.

In the mozbc input file, there is an error. Option 202 uses only 4 aerosol size bins, yet your input file is trying to assign WACCM output to 8 aerosol size bins. You need to combine bins 1 and 2, bins 3 and 4, bins 5 and 6, and bins 7 and 8 like I have in my mozbc input file (attached).

Regards,

Mary

^--^--^--^--^--^--^--^--^--^--^--^--^--^--^-^--^--^--^-^--^

Mary Barth

Senior Scientist

phone: 303-497-8186 email: bar...@ucar.edu

NSF - National Center for Atmospheric Research

P.O. Box 3000

Boulder, CO 80307

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mozbc_mozartmosaic.inp

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