CRGAQS: CAMx 2004 PSAT Results

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CRGAQSCAMx 2004 PSAT Results

• Presentation to the
• Gorge Study Technical Team
• By
• ENVIRON International Corporation
• June 6, 2007

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Todays 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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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

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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)

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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

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PSAT 2004 Base Case
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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

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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 BCs
• 10-day spin-up was not run for PSAT
• 12-km 3-D concentration fields on August 10 used
  as ICs

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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

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PSAT August 2004 Results
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0.9 ug/m3
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PSAT November 2004 Results
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Next Steps

• Finish PSAT (2018 August and November)
• Complete report