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CRGAQS: CAMx 2004 PSAT Results

CRGAQS: CAMx 2004 PSAT Results. Presentation to the Gorge Study Technical Team By ENVIRON International Corporation June 6, 2007. Today’s Presentation. Describe latest CAMx simulations Use of PSAT on: August 2004 Base Year scenario November 2004 Base Year scenario Next Steps.

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CRGAQS: CAMx 2004 PSAT Results

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  1. CRGAQS:CAMx 2004 PSAT Results Presentation to the Gorge Study Technical Team By ENVIRON International Corporation June 6, 2007

  2. Today’s Presentation Describe latest CAMx simulations • Use of PSAT on: • August 2004 Base Year scenario • November 2004 Base Year scenario • Next Steps

  3. PM Source Apportionment Technology • What is PSAT? • Emissions of PM and gas precursors are stratified by source category and by source region • Tracers are used to tag emissions from each category-region pair and to track their transport, chemical evolution, and fate

  4. PM Source Apportionment Technology • Tracers are run for species groups: • Sulfur (SO2 and PSO4) • Nitrogen (NOx, NOy, nitric acid, ammonia, PNO3, and PNH4) • Organics (VOC, condensable hydrocarbon products, and SOA components) • Primary PM (carbonaceous, fine/coarse dust, and fine/coarse other PM)

  5. PSAT 2004 Base Case • Quantify source attribution at Mt Zion and Wishram • 12 source categories by 6 source regions • 10 source categories + IC + BC • Region 6 handles all emissions outside the 4-km grid • Sulfur, nitrogen, and primary PM groups • Organics: let core model report biogenic vs. anthropogenic apportionment

  6. PSAT 2004 Base Case

  7. PSAT 2004 Base Case • Source categories: • On-road mobile sources • Non-road mobile sources • Ammonia sources • Other area sources • Electric generating units (EGU) • Pulp mills • Wildfires • Other fires • Other point sources • All emissions outside the 4-km grid

  8. PSAT 2004 Base Case • 6x10 category/region matrix + IC/BC = 62 unique tracers • Sulfur (2 species), Nitrogen (7 species), primary PM (6 species) for each tracer • Total = 930 total tracers in PSAT • To “fit” the model into memory: • Run only the 4- and 12-km grids • 36-km grid results used to extract 12-km BC’s • 10-day spin-up was not run for PSAT • 12-km 3-D concentration fields on August 10 used as IC’s

  9. PSAT 2004 Base Case • PSAT results were post-processed for two monitoring sites along the Columbia River: • Mt Zion, and Wishram • Report results for the episode-average source apportionment (August 10-22, November 3-18) • Tables presented for “top” ranked emission category-region pairings • Represent 90%+ mass concentrations for each species

  10. PSAT August 2004 Results

  11. 0.9 ug/m3

  12. PSAT November 2004 Results

  13. Next Steps • Finish PSAT (2018 August and November) • Complete report

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