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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Presentation transcript:

BRAVO Results of CMAQ-MADRID Betty Pun, Christian Seigneur & Shiang-Yuh Wu AER, San Ramon Naresh Kumar EPRI, Palo Alto 10 October 2002

CMAQ Modeling Domain

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

October Episode, 4-km and 12-km Simulations, Time Series Sulfate (  g/m 3 ) at Big Bend

October Episode, 4-km and 12 km Simulations, Regression Analysis Sulfate (  g/m 3 ) at Big Bend 4-km simulation 12-km simulation

October Episode, 12-km Simulation Regression Analysis Sulfate (  g/m 3 ), 39 Sites

Chemical Composition at Big Bend

Sulfate on 11 & 12 October

PM 2.5 on 11 & 12 October

O 3 on 11 & 12 October

August Episode, 4-km Simulation Time Series Sulfate (  g/m 3 ) at Big Bend Oct

August Episode, 4-km Simulation Regression Analysis Sulfate (  g/m 3 ) at Big Bend

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

Emission Sensitivity Simulations 100% reduction in SO x emissions from –Mexico –Texas –Other states 50% reduction in NO x, VOC and CO emissions from –Mexico –Texas –Other states

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 SO x emission sensitivity simulations for October episode completed by late November SO x emission sensitivity simulations for August episode completed by mid-January (revised simulation) NO x /VOC/CO emission sensitivity simulations completed by January (October episode) and February (August episode)