BRAVO Results of CMAQ-MADRID

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BRAVO Results of CMAQ-MADRID

• Betty Pun, Christian Seigneur Shiang-Yuh Wu
• AER, San Ramon
• Naresh Kumar
• EPRI, Palo Alto
• 10 October 2002

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CMAQ Modeling Domain
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CMAQ Simulations

• Two episodes
• 5-15 October 1999
• 10-25 August 1999
• Simulations
• Tracers completed
• Base PM simulations completed, revised August
  simulation in progress
• Emission sensitivity simulations in progress

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October Episode, 4-km and 12-km Simulations, Time
Series
Sulfate (mg/m3) at Big Bend
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October Episode, 4-km and 12 km Simulations,
Regression Analysis
Sulfate (mg/m3) at Big Bend
4-km simulation
12-km simulation
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October Episode, 12-km SimulationRegression
Analysis
Sulfate (mg/m3), 39 Sites
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Chemical Composition at Big Bend
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Sulfate on 11 12 October
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PM2.5 on 11 12 October
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O3 on 11 12 October
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August Episode, 4-km SimulationTime Series
Sulfate (mg/m3) at Big Bend
Oct 17 18 19 20 21 22
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August Episode, 4-km SimulationRegression
Analysis
Sulfate (mg/m3) at Big Bend
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CMAQ Performance

• First performance evaluation for a regional PM
  model with a comprehensive database (daily
  speciated data with good spatial coverage)
• Performance for October PM simulation is
  satisfactory, at least for BBNP
• Performance for August PM simulation is not
  satisfactory sensitivity to boundary conditions
  is being investigated using REMSAD results to
  provide better temporal resolution

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Emission Sensitivity Simulations

• 100 reduction in SOx emissions from
• Mexico
• Texas
• Other states
• 50 reduction in NOx, VOC and CO emissions from
• Mexico
• Texas
• Other states

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CMAQ Schedule

• Tracer simulation results Analysis completed in
  October
• Base PM simulations August simulation revised by
  late November, performance evaluation drafted by
  end of November
• SOx emission sensitivity simulations for October
  episode completed by late November
• SOx emission sensitivity simulations for August
  episode completed by mid-January (revised
  simulation)
• NOx/VOC/CO emission sensitivity simulations
  completed by January (October episode) and
  February (August episode)