12th Annual CMAS, Chapel Hill, NC, 2013 Litao Wang, Zhe Wei, Jing Yang, Pu Zhang, Xiujuan Zhao, Yang Zhang, Fenfen Zhang, Jie Su, Chenchen Meng, and Qiang.

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12th Annual CMAS, Chapel Hill, NC, 2013 Litao Wang, Zhe Wei, Jing Yang, Pu Zhang, Xiujuan Zhao, Yang Zhang, Fenfen Zhang, Jie Su, Chenchen Meng, and Qiang Zhang Hebei University of Engineering, Handan, Hebei, China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing, China North Carolina State University, Raleigh, NC, USA Tsinghua University, Beijing, China

12th Annual CMAS, Chapel Hill, NC, 2013

 January 27, 2013, Shijiazhuang Source:

12th Annual CMAS, Chapel Hill, NC, 2013  Top 10 polluted cities in China (MEP) in Jan. 2013:  Xingtai (Southern Hebei)  Shijiazhuang (Southern Hebei)  Baoding (Hebei)  Handan (Southern Hebei)  Langfang (Hebei)  Hengshui (Hebei)  Jinan  Tangshan (Hebei)  Beijing  Zhengzhou

12th Annual CMAS, Chapel Hill, NC, 2013  Jul.-Sep, 2013 ◦ Xingtai ◦ Shijiazhuang ◦ Tangshan ◦ Handan ◦ Jinan  Jan.-Jun., 2013 ◦ Xingtai ◦ Shijiazhuang ◦ Handan ◦ Baoding ◦ Tangshan

12th Annual CMAS, Chapel Hill, NC, Province total ： 28% 25% 28% 24% 29% 28% 30% 24% INTEX-B ， (Zhang et al., 2009., ACP)

12th Annual CMAS, Chapel Hill, NC, 2013 Monthly total number of hazy days occurred in the seven cities: Shijiazhuang, Xingtai, Beijing, Tianjin, Taiyuan, Zhengzhou and Jinan, from 2001 to February Wang et al., Atmos. Environ.

12th Annual CMAS, Chapel Hill, NC, 2013

 CMAQ  MM5 3.7  Period: Jan. and Feb., 2013  Horizontal: ◦ Domain 1: 36*36 km ◦ Domain 2: 12*12 km  Vertical: 14 layers  Gas phase: SAPRC-99  Aerosol: AERO4  Emission: MEIC (

12th Annual CMAS, Chapel Hill, NC, 2013 Sectors Regions All sectors (AL) Powerplants (PO) Industrial (IN) Domestic (DO) Transportation (TR) Agriculture (AG) Southern Hebei (SHB) √√√√√√ Northern Hebei (NHB) √√√√√√ Beijing & Tianjin (BJTJ) √√√√√√ Shanxi (SX) √√√√√√ Shandong (SD) √√√√√√ Henan (HN) √√√√√√ Brute Force Method

12th Annual CMAS, Chapel Hill, NC, 2013 DatasetData typeVariableData frequency Site number Time period NCDCMeteorology T2, RH2, WD10, WS10, Every 1 or 3-hour371 Jan. 1 – Feb. 28, 2013 PrecipitationDaily CNEMCAir qualityPM 2.5, PM 10 Hourly496 Jan. 13 – Feb. 28, 2013 HEBEUAir qualityPM 2.5, PM 10 Hourly1Jan. 1 – Feb. 28, 2013 CNEMC- China National Environmental Monitoring Center

12th Annual CMAS, Chapel Hill, NC, 2013 January February

12th Annual CMAS, Chapel Hill, NC, 2013 JanuaryFebruary Concentrations NMBs

12th Annual CMAS, Chapel Hill, NC, 2013 Time series of PM 2.5 concentrations. (a-d) are for Shijiazhuang, (e-f) are for Xingtai, (g-i) are for Handan. UrbanRuralUrban Rural

12th Annual CMAS, Chapel Hill, NC, 2013  Even with the same emission, the southern Hebei cities may experience heavier air pollution than the other cities.  The convergence and confrontation of the stable air blowing from the Taihang Mountain and the air blowing from the south or east over southern Hebei, result in a very stable atmosphere. Dec, 2007Jan 1-13, 2013Jan 14-31, 2013 Feb, 2013

12th Annual CMAS, Chapel Hill, NC, 2013 Southern Hebei Northern Hebei Beijing &TianjinShanxi Shandong Henan Shijiazhuang Xingtai Handan

12th Annual CMAS, Chapel Hill, NC, 2013 Southern Hebei Northern Hebei Beijing &TianjinShanxi Shandong Henan Shijiazhuang Xingtai Handan

12th Annual CMAS, Chapel Hill, NC, 2013  Even in the top two most polluted months, i.e., Jan 2013 and Dec 2007, a large faction of PM 2.5 may originate from quite different regional sources.  Domestic and industrial sources in northern Hebei, Beijing & Tianjin, and Shanxi are the two most important contributors. But the top two largest contributors in Shandong and Henan to Xingtai and Handan are domestic and agricultural emissions.  The special locations, huge amounts of emissions, and highly complex emission environment, pose a significant challenge to mitigate air pollution in southern Hebei to meet the national standards for PM concentrations.

12th Annual CMAS, Chapel Hill, NC, 2013  This study was co-sponsored by the National Natural Science Foundation of China, the Natural Science Foundation of Hebei Province, the State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, the Excellent Young Scientist Foundation of Hebei Education, and the China Scholarship Council at HEBEU, China and the U.S. DOE climate modeling programs at NCSU, U.S.A.  This study used resources of the National Energy Research Scientific Computing Center (NERSC), which is supported by the Office of Science of the U.S. Department of Energy.

12th Annual CMAS, Chapel Hill, NC, 2013