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Models-3/CMAQ Applications in California

Models-3/CMAQ Applications in California. Ajith Kaduwela, Ph.D. Planning and Technical Support Division. Collaborators. Emissions Paul Allen, P.E. Meteorology Shuming Du, Ph.D. Kemal Gurer, Ph.D. Daniel Chau, Ph.D Air Quality Bruce Jackson, M.S. Luis Woodhouse, Ph.D.

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Models-3/CMAQ Applications in California

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  1. Models-3/CMAQ Applications in California Ajith Kaduwela, Ph.D. Planning and Technical Support Division Models-3/CMAQ Workshop

  2. Collaborators • Emissions • Paul Allen, P.E. • Meteorology • Shuming Du, Ph.D. • Kemal Gurer, Ph.D. • Daniel Chau, Ph.D • Air Quality • Bruce Jackson, M.S. • Luis Woodhouse, Ph.D. • Jinyou Liang, Ph.D.

  3. California Air Quality Studies • 1997 Southern California Ozone Study (SCOS) • Mostly Government funds ($5.5 million) • 2000 Central California Ozone Study (CCOS) • Federal, state, local, and industry collaboration • ~$10 million spent and ~$8 million needed • 2000 California Regional Particulate-Matter Air Quality Study (CRPAQS) • Federal, state, local, and industry collaboration • Based on the findings of IMS-95 (~$5 million) • ~$27+ million Models-3/CMAQ Workshop

  4. Southern California Ozone Study Modeling Aspirations 7 AQ Models x 3 Met Models x 3 Episodes x 2 Chemistries UAM MM5 Aug 04-07, 97 CB-IV UAM-FCM CALMET Sep 29-31, 97 SAPRC99f CALGRID MM5/CALMET Jul 14-19, 98 CAMx SAQM MAQSIP CMAQ Models-3/CMAQ Workshop

  5. SCOS Modeling Domain in UTM Models-3/CMAQ Workshop

  6. Zone 7 Zone 8 Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 Zone9 Zone6 Zone 0 SCOS Subregions for Air Quality Model Performance Analysis Models-3/CMAQ Workshop

  7. Models-3/CMAQ Workshop

  8. Models-3/CMAQ Workshop

  9. CAMx and CALGRID Performance Measures August 05, 1997 Zone 2 Zone 3 Zone 4 Zone 6 Zone 8 Obs.Max. 96 142 187 122 106 Model PR NB PR NB PR NB PR NB PR NB CMAQ/CB4 0.91 -281.01 -240.91 +111.21 -281.51 -21 CAMx/CB4 0.83 –24 0.86 –18 0.89 +07 1.02 –31 1.40 -21 CGD/CB4 0.87 –28 0.94 –090.86 +061.20 –18 1.18 -15 CMAQ/S99f 0.94 -230.95 -220.92 +191.28 –171.58 -11 CAMx/S99f 0.74 –28 0.82 –21 0.90 +051.10 –24 1.36 -27 CGD/S99f 1.15 –041.08 +080.92 +20 1.33 –02 1.25 +05 Numbers in bold type meet USEPA (1991) model performance guidelines ‘PR’ is peak ratio, and ‘NB’ is normalized bias. Models-3/CMAQ Workshop

  10. Model Performance measures of NOx and CO August 5, 1997 Zone 4 Zone 5 Zone 5 O3 NOx CO Model PR NB PR NB PR NB CMx/CB4 0.89 +07 1.66 +40 1.21 -13 CGD/CB4 0.86 +06 1.47 +46 1.16 +00 CMx/S99f 0.90 +05 1.68 +43 1.20 -17 CGD/S99f 0.92 +20 1.13 +22 0.96 -18 * ‘PR’ is peak ratio, and ‘NB’ is normalized bias. Models-3/CMAQ Workshop

  11. Southern California Toxic Air Contaminants Modeling Aspirations 3 AQ Models x 2 Met Models x 1 “Episode” x 1 Chemistry UAM-FCM MM5 1998 SAPRC99f+TAC CALGRID CALMET CMAQ Models-3/CMAQ Workshop

  12. Ventura San Bernardino Los Angeles Riverside Orange San Diego Mexico Regional Domain for Toxics Modeling Models-3/CMAQ Workshop

  13. Domain Peak 1-hr Ozone (ppb) August 1998

  14. Peak O3 CGD: Aug3 @ 13 hrs CGD: Aug2 @ 14 hrs CMAQ: Aug 2 @ 17 hrs CMAQ: Aug 3 @ 16 hrs

  15. Performance for Toxics Models-3/CMAQ Workshop

  16. Conclusions • In general, performance of CMAQ is consistent with that of other models • We may experience some limitations of CMAQ and IO/API • Efficiency of the code is a concern • Expect to enhance model capabilities, especially for PM Models-3/CMAQ Workshop

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