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CMAQ Modeling Plans for BRAVO

CMAQ Modeling Plans for BRAVO. Naresh Kumar Electric Power Research Institute. EPRI Version of CMAQ. Sectional approach for particle size distribution ISORROPIA to simulate the gas/particle partitioning of inorganic chemical species

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CMAQ Modeling Plans for BRAVO

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  1. CMAQ Modeling Plans for BRAVO Naresh Kumar Electric Power Research Institute

  2. EPRI Version of CMAQ • Sectional approach for particle size distribution • ISORROPIA to simulate the gas/particle partitioning of inorganic chemical species • Odum et al. approach for secondary organic aerosol formation • CMU Cloud module with detailed aqueous chemistry

  3. Modeling Plans • Two episodes of 7-10 days duration • October 7-17, 1999 • August 15-25, 1999 • Modeling domain consistent with MM5 domain - 12 km and 4 km nested domain • Gridded emissions inventory for NOx, VOC (speciated for CB-IV), CO, SO2, NH3, PM (fine and coarse, speciated)

  4. Base Case Modeling • Boundary Conditions • IMPROVE data • Emissions • Mexican emissions may need to be adjusted • Model Evaluation • compare model predictions against observations for gases and PM species

  5. Emission Sensitivity Simulations • Run simulations with zeroing of emissions from different sources/source areas • Assess simulated impact of different sources on fine PM concentrations at Big Bend • Run these simulations for both episodes

  6. Timeline • First episode MM5 run March 2001 • Emissions Modeling (SMOKE) May 31, 2001 (?) • First episode base case August 2001 • First episode emissions sensitivity November 2001 • Second episode MM5 run July 2001 (?) • Second episode base case October 2001 • Second episode emissions sensitivity February 2002

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