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4 th GEOS-Chem USERS’ MEETING Maxwell-Dworkin building, room G115

Development, evaluation, and application of GEOS-Chem driven by CCSM3 meteorological fields Presenter: Daeok (Daniel) Youn Atmospheric Chemistry Modeling Group School of Earth and Environmental Sciences, Seoul National University, Seoul, 151-742, Korea, Republic of.

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4 th GEOS-Chem USERS’ MEETING Maxwell-Dworkin building, room G115

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  1. Development, evaluation, and application of GEOS-Chem driven by CCSM3 meteorological fieldsPresenter: Daeok (Daniel) Youn Atmospheric Chemistry Modeling Group School of Earth and Environmental Sciences,Seoul National University, Seoul, 151-742, Korea, Republic of 4th GEOS-Chem USERS’ MEETING Maxwell-Dworkin building, room G115 Harvard University, Cambridge, MA, April 7, 2009

  2. Objective and Background Recent changes in Emissions by sector SO2 vs. CO CO emissions inventory over Globe and Asia Global CO B40 December

  3. Simulated seasonal surface O3 for 2001: GEOS-Chem/CCSM3 vs. GEOS-Chem/GEOS-4 GEOS-Chem/CCSM-3 GEOS-Chem/GEOS-4 Both simulations produced consistent seasonal and spatial patterns of ozone concentrations in surface air.

  4. Comparison between Simulated and Sonde O3 at 800 hPa CCSM-3 GEOS-4 Both simulations reproduced ozone sonde observation relatively well.

  5. Comparison between Simulated and Sonde O3 at 500 hPa CCSM-3 GEOS-4

  6. Comparison between Simulated and Sonde O3 at 300 hPa CCSM-3 GEOS-4

  7. GEOS-Chem driven by CCSM3(CAM3-CLM3)+DGVM An application of off-line coupling between GEOS-Chem and CCSM3 for 1997-2007 to look at the impact of BVOC emissions on air quality in East Asia

  8. Simulated Surface Variable in 2000 and 2006 LAI in East Asia Decreases in LAI in northeast China correspond to the increases in surface air temperature in the same region. PAR in East Asia 2-m air Temperature

  9. MODIS LAI & NCEP-R2 T2m air (Observation) LAI in East Asia MODIS-BU 2m air Temp. NCEP-R2 Observations show opposite results from the model in LAI and air temp. the negative correlation between changes in LAI and surface holds both for obs. And model

  10. Simulated Surface Isoprene and resulting Ozone Change GEOS-Chem/CCSM3+DGVM GEOS-Chem/GEOS-4 Ozone change is likely related to the distribution of isoprene at the near surface over East Asia, esp. east China, for the two different years.

  11. Additional slides

  12. Change in Surface Variables: GEOS-4 LAI in East Asia PAR in East Asia 2-m air Temperature

  13. BVOC emissions by CCSM3-DGVM and GEOS-Chem/CCSM3-DGVM CCSM3-CLM3 GEOS-Chem/ CCSM3-DGVM Isoprene emissions from CCSM3-DGVM and GEOS-Chem are in general agreement in that lower isoprene emissions in mid- to high- latitudes over most of Northeast Asia for 2005 and higher emissions in tropics over Southeast Asia are shown. Vegetation maps are different!

  14. CAM3-CLM3 with DGVM Interactive Vegetation Observed SST for 1997-2007 Meteorological Fields, Land Surface Variables, Tsfc, LAI, and PAR Bonan et al. (2003) Sitch et al. (2003)

  15. Comparison between Observed vs. Simulated Plant Type Functions (PFT) Observation Default CCSM3 CCSM3+DGVM

  16. MODELS • CAM3-CLM3: • 1) with prescribed vegetation and 2) interactive vegetation (DGVM) • GEOS-Chem driven by the CAM3-CLM3 Prescribed Vegetation CAM3-CLM3 14 PFT and 10 LAI in a grid CAM3-CLM3 with DGVM 500 year control Surface data set SST Climatology GEOS-Chem/CCSM3 Observed SST for 1997-2007 Output: surface component (PFT, LAI, SAI, Height) Interactive Vegetation Air Quality (O3 and Aerosol) 10 PFT and 1 LAI in a grid CAM3-CLM3 with DGVM Initial condition Observed SST for 1997-2007

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