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Ozone and Aerosols in US and East Asia between 2001 and 2002

Ozone and Aerosols in US and East Asia between 2001 and 2002. Yun-Fat Lam 1 , Joshua S. Fu 1 , Zuopan Li 1 , Carey Jang 2 , Rokjin Park 3 and Daniel J. Jacob 3. 1. The University of Tennessee, Knoxville 2. USEPA/Office of Air Quality Planning & Standards 3. Harvard University. GEOS-Chem

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Ozone and Aerosols in US and East Asia between 2001 and 2002

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  1. Ozone and Aerosols in US and East Asia between 2001 and 2002 Yun-Fat Lam1, Joshua S. Fu1, Zuopan Li1, Carey Jang2, Rokjin Park3 and Daniel J. Jacob3 1. The University of Tennessee, Knoxville 2. USEPA/Office of Air Quality Planning & Standards 3. Harvard University

  2. GEOS-Chem Global scale model 20 to 55 vertical layers 2 x 2.5 degree resolution (Max. 1 x 1) CMAQ Regional scale model 14 to 16 vertical layers 18’ x 18’ resolution (36 km domain resolution) Coupling GEOS-Chem & CMAQ • GEOS-Chem simulations (2001 and 2002) are conducted by Rokjin Park at Harvard U. • The output results are used for the input data for CMAQ model

  3. Examples of GEOS-Chem Simulation Results Ox NOx

  4. Initial Condition Processor (ICON) GISS GCM Model GEOS-Chem Output Meteorology-Chemistry Interface Processor Boundary Condition Processor (BCON) Interface processor Gridded Emissions Or SMOKE Photolysis Rate Processor (JPROC) Meteorology-Chemistry Interface Processor CMAQ Chemical Transport Model (CCTM) The CMAQ Chemical Transport Model (CCTM) Initial Condition Processor (ICON) Boundary Condition Processor (BCON)

  5. Interface processor • Handle geo-spacial differences between two models. (e.g. projection system) • Convert chemical species (may or may not compactable) • Interpolate species concentration based on the vertical layer profiles ( 55 Vs. 14 layers)

  6. Species Map for Ozone & PM2.5 2001 data 2002 data * EPA/ORD added these species in the table from the list of species in the GEOS-CHEM chemical mechanism Blue color highlighted tracers are GEOS-Chem new tracers

  7. Species Calculation- CMAQ • Calculation of PM2.5 PM25 = ASO4I+ASO4J+ANO3I+ANO3J+ANH4I+ ANH4J+AORGAI+AORGAJ+(1.167*AORGPAI)+(1.167*AORGPAJ)+AORGBI+AORGBJ+AECI+AECJ+A25I+A25J • Calculation of O3 O3 = Ox - NOx

  8. Summary of vertical profiles

  9. Output from the GEOS-Chem/CMAQ Interface Processor • ICON and BCON data was generated using the interface processor for both 2001 & 2002 GEOS-Chem output data • Additional 2001 and 2002 gridded data (Gd-data) was generated for QA 2002 Gd-data 2001 Gd-data Interface Processor BCON ICON

  10. O3 & PM2.5 Comparison (Summer)

  11. Gd-data for 2001 and 2002 * These values was determined using the species table

  12. Vertical profile Vs. Average O3 (2002 BCON) WEST EAST SOUTH NORTH

  13. Vertical profile Vs. Average O3 (BCON) Month of June

  14. IC/BC for US Domain from GEOS-Chem Results GEOS-CHEM IC GEOS-CHEM BC

  15. IC for CN Domain from GEOS-Chem and Profile Profile IC GEOS-CHEM IC

  16. Simulations • Simulations with different IC/BC • Simulation 1: with Profile IC/BC(Regular CMAQ run) • Simulation 2: with GEOS-Chem IC/BC • Domain: cn36 • Episode: July 01-31, 2001 (spin-out: 5 days)

  17. Monthly Maximum (O3) GEOS-CHEM IC/BC Difference Profile IC/BC GEOS-Chem IC/BC generate higher O3 concentrations around Beijing Areas

  18. Monthly Average (PM2.5) Profile IC/BC GEOS-Chem IC/BC Difference GEOS-Chem IC/BC run does get a little bit higher PM2.5 values than the profile run around the Beijing area ( 1 – 2 ug/m3)

  19. Summary • The ozone concentration, as well as the concentration profile with respected to elevation is similar between 2001 and 2002. • More tracers are used in 2002. This may contributed to the increased trends of PM2.5 from 2001 to 2002. • The GEOS-Chem/CMAQ Interface can provide CCTM IC/BC inputs from GEOS-Chem simulation results, and CCTM runs smoothly with the GEOS-Chem IC/BC inputs • The output demonstrated apparently different monthly maximum O3 results between the simulation using profile IC/BC and the simulation using GEOS-Chem IC/BC. Results also shows a slight increasing trend of PM2.5 values.

  20. Acknowledgement • USEPA’s STAR and ICAP financial support • NCAR's supports of computing resources through projects #35991003 and #35991004 • Collaborators in EPA/OAQPS and EPA/ORD

  21. The End

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