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Winter Ozone Meteorology Modeling Notes

CMAS 2014 WRF Modeling of wintertime ozone

Please feel free to add to this list, especially questions or people we should talk with at CMAS.

Monday: Poster # 36: Marco Rodriguez – Evaluation and Inter-Comparison of Winter Ozone Model Performance for Two Western Oil and Gas Basins

Tuesday: 2:20 : Ravan Ahmadov – What drives high wintertime ozone in the oil and natural gas fields of the Western US?

3:20: M. Barna - Modeling the Role of Oil and Gas Emissions on Regional Ozone in the Intermountain West

Poster #6: Bernhard Rappengluck- Strong wintertime ozone events in the Upeer Green River Basin, Wyoming

Poster #7: Timothy Vinciguerra - Potential regional air quality impacts of hydraulic fracturing activity

Poster #29: Courney Taylor – Utah Bureau of Land Management Air Resource Strategy (ARMS) Modeling Study: Potential Impacts to Winter Ozone Formation using Future Emission Scenarios

People to talk with:

Lance Avey, Rob Gilliam, Jon Pleim, Marco Rodriguez, Chris Misenis, Kirk Baker, Pat Dolwick, Ravan Ahmadov, M. Barna, Bernhard Rappengluck, Timothy Vinciguerra, Courtney Taylor, Gail Tonneson


How does PX and snow interact when using the indirect soil nudging as recommended when using PX? – Jon Pleim & Rob Gilliam

Which PBL schemes have shown large sensitivity to Cold Air Pools? – Chris Misenis Lance Avey,

Get thoughts about switching modeling configuration within the year, especially PX and NOAH.

Get ideas about how to handle initialization given the problems about initialing in the middle of the CAP.

Conversations with Erik Crossman (October 21 2014):

I agree with Lance that your plan looks good. We would be very interested in the results from your PBL and LSM tests, and we will be sure to pass on info on NLCD vs USGS vs MODIS tests and possible implementation of the Kim et al. 2014 Thompson ice fog scheme, hopefully within the next 2 months. I've included a link to an overview powerpoint presentation I just gave today at NWA the last few weeks Chris Foster, one of our graduate students, has shown that starting the run at different times can impact the CAP magnitude (this is the example Lance mentioned

As for meteorological validation data from Uintah Basin and PCAPS field study, the time-height hourly data that is really useful and can be used to make comparison plots like in slide 14 can be found at the following locations:

Time height data:

The PCAPS 2010-2011 time-height data is here:

There is a powerpoint that describes a little about the data too:

Additional links to surface data, etc from PCAPS can be found at the PCAPS website:

The meteorological data that University of Utah collected from the Uintah Basin is all available here:

It was a low-budget short study so only about a dozen soundings and some surface and ceilometer data.

Additional Uintah Basin vertical profiles are out there from NOAA and other groups but we have not worked to collect them from the various groups and I'm not sure if there will be a go-to place for that data in the future.

This is the location of the wps and wrf namelist and also the edits to the vegparm changes that are in the Neemann et all. 2014 paper are located here:

Conversation with Lance Avey (October 21 2014)

January 2014 saw numerous days in Utah (Salt Lake Valley and Uintah Basin) that were influenced by CAPS. There were quite a few exceedences of 24-hr PM2.5 NAAQS in SLC and a couple ozone exceedences at the Ouray site in the Basin. The snow cover in the Unitah Basin in 2014 was not as extensive and was probably aged snow so we did not see the high albedos and photolysis and thus high ozone as in the previous 2013 winter.

We (Utah DAQ) would have surface data of meteorological, PM2.5, and ozone at our Wasatch Front and Uintah Basin sites for the 2014 year, so we could provide you that data.

For experiments, one interesting think we are finding is that the initialization time is very important to WRF model performance of CAPs. For example, you probably do not want to initialize your WRF model run in the middle of CAP episode. It is best to initialize WRF at the beginning of the CAP episodes. Erik can probably provide an example of this.

So we caution at just running WRF in 5.5 days blocks and then re-initializing. Typically, the start of the CAP episode occurs at the same time in the Salt Lake Valley and Uintah Basin (and I'm guessing Southwest Wyoming too), so investigating and applying more suitable initialization start times may be doable for the winter months in the 3SAQS domain.

Conversation with Erik Crossman (October 22, 2014)

This is the location of the wps and wrf namelist and also the edits to the vegparm changes that are in the Neemann et all. 2014 paper are located here: