1. O 3 and fine particle pollution in China and regional air quality modeling Yuanhang Zhang College of Environmental Sciences Peking University Beijing 100871, China

2. Outline  O 3 in regions and high mountains  PM 2.5 in regions  Trends in Beijing and Hong Kong (PRD)  Regional & global modeling

3. Li Jiang E_Mei Mt Hai Nan Wu Dang Mt Wu Yi Mt Zhou Shan PKU_ BOGES Mt. Everest Beijing-Tianjing City Clusters (Mega City) Mega, large, middle, small cities/towns: connected through intensely economic activities Formed due to fast urbanization City-Clusters in eastern coast areas Pearl River Delta Yangtze River Delta Vehicle in Beijing Mt. Waliguan

4. O 3 pollution in Beijing

5. June 21-July 3, 2000 ） Spatial distribution of O 3 in Beijing area ( June 21-July 3, 2000 ） 8 hrs mean Maximun

6. O 3 in PKU campus April, July and August

7. Gaseous pollutants in Xinken (Rural area of Guangzhou)

8. Aircraft PRD regional O 3 pollution High O 3 Conc.

9. O 3 concentation in Yangtze Delta JiaXin JianHu LinAn SheShan ChangShu

10. O 3 in Mt. Everest (From T. Zhu)

11. O 3 in Waliguan: Gaw station From CAMS

12. From Prof. Akimoto

14. PM 2.5 concentrations in several regions and cities of China 2003,8 E_Mei Mt. 54 ug/m3 Wuyi Mt. 54 ug/m3

15. PM 2.5 in fives stations in PRD Average during Oct 7-Nov 4, 2004 PM 2.5 /PM 10 CH 0.87 HZ 0.70 WQS0.69 UB* 0.78 Aircraft0.86

16. Chemical speciation of PM 2.5 Main chemical compositions of PM 2.5 in several locations, ug/m 3 (Some data from joint project of PKU and Georgia Tech) SO 4 2- + NO 3 - + NH 4 + + OC: 60-70% Beijing: 95.5 ug/m 3

17. Variation of light scattering and absorption coefficient in Guangzhou 300 61 0.83 Collaboration with MPI and IFT, Germany

18. Climate effects of aerosol pollution Radiative forcing is negative: –25 Wm –2 TOA –100 Wm –2 BOA 25% integral daylight decrease of BOA solar flux 37% decrease of NO 2 photolysis rate SSA （ 0.87 ） GZ 0.83 Beijing 0.79 Lin-An 0.82 Guangzhou Collaboration with MPI and IFT, Germany

19. Relationship between light absorption and OC/EC in Guangzhou b abs = 9.79 + 0.758*OC + 7.70*EC R 2 = 0.958 Urban from MPI Xinken EC ： 70 － 80 ％ OC ： 20 － 30 ％

20. Oxidative capacity in an increasing trend in Hong Kong O 3 +NO or O 3 : 1ppb/yr

21. NO 2 O 3 +NO 2 O3O3 11 year Trend of O 3 in Taipei (Shaw Liu)

22. Changes of AOD in Beijing 2001200220032004 Spring Summer Autumn Winter From Li et al.

23. Changes of AOD in PRD Gray Haze Day 85 98 144 From Li et al.

24. Long-range Trans-boundary Air Pollutants in Northeast Asia  Participants: –China –Korea –Japan  Focus: –Concentrations of S, N, O 3 and PM –Wet and dry depositions –Source and receptor relationship for sulfur  In the second phase

25. Monthly average of SO 2, NOx, O 3, sulfate, March 2002 case SO2 NOx SO 4 2- O3

26. Source and receptor relationship for sulfur, March 2002 case, % Source budgetReceptor budget Very draft results

27.  Wang, Z.F of IAP  GEATM development  In operation  SO 2, SO 4 2-, Dust, BC, Hg, etc. SO 2 Simulation SO 2 Stateline data Global Environmental Atmospheric Transport Model

28. IMPACT,Chuang et al. 2002 GEATM Wang Z. F. IMPACT Chuang et al. 2002

29. Net flux in each grid In-flowOut-flow

30. Summary  O 3 and fine particle concentration in China was high  Trend?  O 3 and AOD, in increasing  PM 2.5 ?  Regional & global modeling