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REMSAD VERSION 7.10 WITH SOURCE TAGGING

REMSAD VERSION 7.10 WITH SOURCE TAGGING. Inter-RPO Modeling Meeting May 25, 2004 Shan He, Emily Savelli, Jung-Hun Woo, John Graham and Gary Kleiman, NESCAUM. OBJECTIVES. Evaluate performance of tagging module by comparing tagged and non-tagged model results with EPA’s CSA model result

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REMSAD VERSION 7.10 WITH SOURCE TAGGING

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  1. REMSAD VERSION 7.10 WITH SOURCE TAGGING Inter-RPO Modeling Meeting May 25, 2004 Shan He, Emily Savelli, Jung-Hun Woo, John Graham and Gary Kleiman, NESCAUM

  2. OBJECTIVES • Evaluate performance of tagging module by comparing tagged and non-tagged model results with EPA’s CSA model result • Assess techniques for determining state contribution to sulfate PM fraction and total PM2.5 on regional scale Emphasis is on the technique, not the result!

  3. MODELING • REMSAD V7.10 - CB-IV micro-mechanism - parameterized aerosol chemistry and dynamics - SOA yield from anthropogenic and biogenic hydrocarbons - TAGGING SCHEME for sulfur species (SO2, GSO4, and ASO4), nitrogen, mercury and cadmium • METEOROLOGY - Clear Skies Act (CSA) base year 1996 annual MM5 model run • EMISSIONS - CSA 2001”Proxy” emissions

  4. CSA 2001 “PROXY” EMISSIONS • 1996 Nonroad Rule Emissions: 1996 inventory for all area, nonroad, mobile and point sources, for Canadian, Offshore and US, for criteria pollutants and mercury • Multiplicative factors applied to 1996 Nonroad Rule US EGU, nonroad and mobile sources to create 2001 emissions • - Linear interpolation between 1996 Nonroad Rule and 2010 Transport Rule US non-EGU point and area sources to create 2001 emissions • - 1996 Nonroad Rule Canadian, Mexican, Offshore and biogenics emissions

  5. MODELING DOMAIN - 120 (E-W) X 84 (N-S) grid cells - Cell size (36km X 36km, 0.5o X 0.3333o) - E-W range: 66 degrees W - 126 degrees W N-S range: 24 degrees N - 52 degrees N - Vertical extent: Ground to 16,200 meters (100mb) with 12 layers

  6. MODEL EVALUATION REMSAD V7.10 Non-tagging Run EPA's REMSAD V7.06 Run REMSAD V7.10 Tagging Run Group 1

  7. CONTRIBUTION (NJ Sulfate in PM2.5) Percentage contribution of tagged sulfate to PM2.5 at Brigantine NJ Elevated Sources Contribute ~1% PA Elevated Sources Contribute ~4% All other non-tagged states in Tag Group 1 and surface SO2 emission in whole US contributes ~33% Surface emissions alone ~14%

  8. Tagging: Next Steps • Develop preliminary state contributions to sulfate from elevated point sources for contribution assessment • Performance evaluation using 2002 meteorology and emissions • Explore surface emission tagging; nitrate tagging • Refined analysis is likely to play a role in “weight of evidence” SIP work (See MV modeling presentation at 2pm)

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