PM2.5 overprediction by AQMv7 over Colorado

[JianpingHuang-NOAA]

We are currently seeing PM2.5 over-predictions by AQMv7 over Colorado. This overprediction is not related to wildfire emissions.

@bbakernoaa

[bbakernoaa]

Thanks @JianpingHuang-NOAA. I noticed this in your UIFWC plots. There is actually a sign that there is something happening there in the monitor data from your plots. It may be over predicted. I've been working on improvements to the inputs for FENGSHA. We may be able to try these but I'm hesitant to make the change at this point as I don't want to disrupt the implementation. The sources are not constantly on and so I'm worried about a big change to satisfy a very limited case.

So if you look at the u*/R and compare them to the old ones as shown in the presentation below you can see that the effective dry threshold velocity increases over this region. So likely the new inputs would decrease the dust to zero or in magnitude over CO.

[bbakernoaa]

@JianpingHuang-NOAA I have regridded the fengsha inputs to the AQM_NA_13km domain. You can pick it up here: /scratch1/RDARCH/rda-arl-gpu/Barry.Baker/emissions/nexus/FENGSHA/Online_CMAQ/FENGSHA_2022_NESDIS_DRAG_ML2_UTHRES_inputs_AQM_NA_13km.nc

@rmontuoro

[JianpingHuang-NOAA]

@Barry Baker - NOAA Federal @.***> Should I use it to replace the current Fengsha input file, FENGSHA_p8_10km_inputs_AQM_NA_13km.nc ?

On Mon, Jul 31, 2023 at 1:56 PM Barry Baker @.***> wrote:

@JianpingHuang-NOAA https://github.com/JianpingHuang-NOAA I have regridded the fengsha inputs to the AQM_NA_13km domain. You can pick it up here: /scratch1/RDARCH/rda-arl-gpu/Barry.Baker/emissions/nexus/FENGSHA/Online_CMAQ/FENGSHA_2022_NESDIS_DRAG_ML2_UTHRES_inputs_AQM_NA_13km.nc

@rmontuoro https://github.com/rmontuoro

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[JianpingHuang-NOAA]

@bbakernoaa Can you answer my previous question ?

[bbakernoaa]

Yes you can use it to replace the FENGSHA_p8_10km_inputs_AQM_NA_13km.nc

[JianpingHuang-NOAA]

@bbakernoaa The updated input file fixed the over-prediction issue over Colorado in July 2023, but it caused a big over-prediction after including it in the rerun in Sept. 2022.

I have to change the input file to the original one.

[JianpingHuang-NOAA]

[bbakernoaa]

Can you point me to the output because this isn't helping much....? it actually looks like it fixed the issue over CO.