Formation and causes of NO_x pollution on the east side of the Taihang Mountains in China

查看全文 作　　者：TIAN [1]HeZhong;WANG [1]Yan;ZHAO [1]Dan;CHAI [2]FaHe;XING [3]ZiShan;CHENG [1]Ke

机构地区：[1]State Key Joint Laboratory of Environmental Simulation & Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China;[2]Chinese Research Academy of Environmental Sciences, Beijing 100012, China;[3]School of Computer Science and Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

出　　处：《Chinese Science Bulletin》索引2011年第56卷第19期,共6页

基　　金：supported by the National Natural Science Foundation of China (20677005 and 40975061) 摘　　要：Tropospheric column amounts of NO 2 from OMI/Aura products were applied to investigate the seasonal variation of NO x on the east side of the Taihang Mountains (ESTM) in China. The NO 2 concentration varied seasonally, with winter maxima and summer minima. To explore the causes of the heavy NO 2 pollution in this region, wind field simulations were conducted by using the Fifth-Generation NCAR/Penn State Mesoscale Model (MM5). MM5 simulations showed that wind directions in the ESTM region were dominated by northeasterly and northwesterly winds throughout the year and to a lesser degree by southwesterlies. Elevated NO 2 concentrations (higher than 50×10 15 molec/cm 2 ) occurred in three meteorological situations: convergent wind fields (5 days), northeasterly winds (2 days), and calm days (1 day) in January. Although the local anthropogenic NO x emission strength was not so high as that in other developed areas, the calms and frequent occurrence of convergent wind fields, as well as unfavorable terrains for diffusion, resulted in the accumulation of atmospheric pollutants and hence heavy NO x pollution. Furthermore, long-distance NO x transportation from the Beijing-Tianjin-Tangshan region to the ESTM area could be seen when the wind was from a northeasterly direction, especially under high wind speeds. 关键词：氮氧化物氮污染原因山东中国二氧化氮浓度宾夕法尼亚州立大学 ESTM

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Formation and causes of NO_x pollution on the east side of the Taihang Mountains in China

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