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WRAP CAMx-PSAT Source Apportionment Modeling Results

Explore the latest findings and insights from the CAMx PSAT source apportionment modeling study conducted on air quality aerosols. The study examines regional gridded photochemical CAMx models using PM source apportionment technology similar to CMAQ TSSA methods. Learn about the modeling results for various scenarios and the impact of different sources on air quality. Discover the errors and uncertainties identified, along with the plans for future model simulations to enhance regional haze control strategies.

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WRAP CAMx-PSAT Source Apportionment Modeling Results

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  1. WRAP CAMx-PSATSource ApportionmentModeling Results Implementation Workgroup Meeting August 29, 2006

  2. Source Apportionment Technique • Regional gridded photochemical CAMx air quality aerosol model with PM Source Apportionment Technology (PSAT) • Similar to CMAQ TSSA method used in AoH Phase I report, best available modeling analysis technique for source apportionment • PSAT completed for 2 cases: • Plan02c • 2000-04 average fire emissions, same time & place • 2000-03 CAMD sources’ monthly average SOx/NOx profiles by state • Base18b – rules on the books controls and growth • Tracked sources of sulfate and nitrate • Tracking organic carbon too computationally intensive

  3. Organic Carbon Source Apportionment • PSAT work does not include treatment of primary & secondary organic aerosols: • CMAQ already completed includes 3 OC species • primary organic aerosols • anthropogenic secondary organic aerosols • biogenic secondary organic aerosols • Analysis of these species for the various existing model runs will provide additional information on OC apportionment

  4. Source Apportionment Modeling • White paper describing CAMx PSAT modeling: www.cert.ucr.edu/aqm/308/docs

  5. PSAT: 18 Source Regions on a 36 km Gridplus Initial and Boundary Conditions

  6. PSAT: 6 Source Categories • Examples of PSAT results: “source by region”: • MV_CO = mobile sources in Colorado • PT_CE = point sources in CENRAP

  7. Status of PSAT Modeling • Plan02c & Base18b just completed last week • Results presented here are examples • Direct access to all results & custom displays available through TSS - later in this talk • Results on RMC web page include: • Preconfigured bar charts & maps of monthly average source contributions by region • Contributing sources & regions on 20% best & 20% worst visibility days at each Class I area • http://pah.cert.ucr.edu/aqm/308/cmaq.shtml • See: Table 2. CAMx Visibility Modeling and Source Apportionment Results.

  8. Example Contributing Source Categories on 20% Worst Days Agua Tibia, CA Salt Creek, NM

  9. Example Contributing Source Categories on 20% Worst DaysBadlands, SD Sawtooth, ID

  10. Example Top 10 Contributing Source Regions on 20% Worst DaysAgua Tibia, CA Salt Creek, NM

  11. Example Top 10 Contributing Source Regions on 20% Worst DaysBadlands, SD Sawtooth, ID

  12. Example Contributing Source Regions on 20% Worst DaysAgua Tibia, CA Salt Creek, NM

  13. Example Contributing Source Regions on 20% Worst DaysBadlands, SD Sawtooth, ID

  14. Example Contributing Source Controllability on 20% Worst DaysAgua Tibia, CA Salt Creek, NM

  15. Example Contributing Source Controllability on 20% Worst DaysBadlands, SD Sawtooth, ID

  16. Example Monthly Average Source Contribution Maps

  17. Example Monthly Average Source Contribution Maps

  18. Example Monthly Average Source Contribution Maps

  19. Example Monthly Average Source Contribution Maps

  20. PSAT: Errors/Uncertainties • Additional errors have been discovered in the emissions inventories: • Base18b non-WRAP EGU emissions were underestimated. • PM2.5 emissions in the WRAP road dust inventory. • RNC is evaluating the effects of these errors.

  21. Effects of non-WRAP EGU errorJuly August September

  22. Effect on PSAT results of non-WRAP EGU error • Air quality prediction effects on WRAP states are relatively small. • Small overestimate of base case progress in 2018 for eastern tier of WRAP region states. • Base18b sufficient as starting point for development of regional haze control strategies • Will correct non-WRAP region EGU error in “Control18” series of modeling simulations in 2007

  23. http://vista.cira.colostate.edu/tss/Tools/SA.aspx WRAP TSS PSAT Display Tool

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