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Journal of Arid Land  2014, Vol. 6 Issue (6): 668-677    DOI: 10.1007/s40333-014-0069-6
Research Articles     
Ambient TSP concentration and dustfall variation in Urumqi, China
XiaoXiao ZHANG1,2*, Xi CHEN1, YuHong GUO2,3, ZiFa WANG2, LianYou LIU4, Cottle PAUL5, ShengYu LI1, HuaWei PI1,3
1 State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2 State Key Laboratory of Atmospheric Boundary Layer and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
3 University of Chinese Academy of Sciences, Beijing 100049, China;
4 Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education, Beijing Normal University, Beijing 100875, China;
5 Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver V6T 1Z2, Canada
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Abstract  Total suspended particulate (TSP, particle diameter≤100 µm) was the dominant air pollutant and sig-nificantly influenced local air quality. In this paper, we investigated the interannual and seasonal variations of TSP and dustfall of the atmosphere over Urumqi, the capital city of Xinjiang Uygur autonomous region, northwestern China, basing on environmental monitoring records and meteorological data from 1986–2012. The results showed that during the study period, annual average TSP concentration decreased from 716 to 260 µg/m3, with an average level of 422.9 µg/m3, while dustfall intensity reduced from 350.4 to 166.6 t/(km2•a), with an average level of 259 t/(km2•a). Over 50% of the annual pollution days were induced mainly by TSP. Spring and winter had relatively higher dustfall intensities, and dense traffic and residential areas had the highest dustfall intensities in the Urumqi metropolitan area. With an annual average precipitation of less than 300 mm, atmospheric particulates in Urumqi could be hardly removed through wet deposition. During spring and summertime prevailing winds from northwest and northeast could carry aeolian dust particles from sandy deserts to Urumqi. Aeolian dusts from deserts would remain to be a priority regarding air pollution control in arid oasis cities.

Key wordsheavy metals      interaction      vegetables      oasis soils      arid regions      Brassica campestris L.     
Received: 08 October 2013      Published: 10 December 2014

This work was supported by the West Light Foundation of the Chinese Academy of Sciences (XBBS201104), the National Natural Science Foundation of China (41301655), the Coopera-tion Team of the Chinese Academy of Sciences (granted to Prof. Xi CHEN, Xinjiang Institute of Ecology and Geography, the Chinese Academy of Sciences), and the Open Funds of the State Key Laboratory of Atmospheric Boundary Layer and Atmospheric Chemistry, China (LAPC-KF-2013-17).

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XiaoXiao ZHANG, Xi CHEN, YuHong GUO, ZiFa WANG, LianYou LIU, Cottle PAUL, ShengYu LI, HuaWei PI. Ambient TSP concentration and dustfall variation in Urumqi, China. Journal of Arid Land, 2014, 6(6): 668-677.

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