| 天气与气候 |
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| Influence of Dust Events on PM10 Pollution in Key Environmental Protection Cities of Northern China during Recent Years |
| FENG Xin-yuan1, WANG Shi-gong2, YANG De-bao2, SHANG Ke-zheng2 |
| 1.Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China; 2.Ministry of Education Key Laboratory of Semi-arid Climate Change; Gansu Key Laboratory of Arid Climate Change and Reducing Disaster; College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China |
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Abstract The influence of dust events on PM10 pollution in 17 key environmental protection cities of northern China has been studied by using the API data of these cities during 2000—2008 as well as the meteorological observation data. The aim of this study is to evaluate the whole influence of dust events on atmospheric environment in these cities and to analyze the influence degree of the springtime dust events in different cities. The main results are as follows. The primary air pollutant in all of these northern cities during 2000—2008 is PM10 and the PM10 pollution is heavy. In spring, the high PM10 concentrations in northern China are associated with the occurrence of dust events. The degree of the influence of dust events in different cities is different. The influence degree on the cities decreases from west to east according to the geographic position of these cities, and Yinchuan, Lanzhou and Xining are among the most affected of all the cities. Dust events can result in heavy PM10 pollution, and the variations of PM10 concentrations can clearly reflect the dust transportation and the variations of the intensity of dust events. Even in the non-dust regions, the PM10 concentration can be seriously affected by dust transported from upstream regions where dust events occurred.
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Received: 15 September 2010
Published: 20 May 2011
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2011, Vol. 31 
