Ambient TSP concentration and dustfall variation in Urumqi, China

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• 作者：XiaoXiao Zhang (1) (2)
  Xi Chen (1)
  YuHong Guo (2) (3)
  ZiFa Wang (2)
  LianYou Liu (4)
  Cottle Paul (5)
  ShengYu Li (1)
  HuaWei Pi (1) (3)
  
• 关键词：total suspended particle ; dust deposition ; desert ; atmospheric environment
• 刊名：Journal of Arid Land
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：6
• 期：6
• 页码：668-677
• 全文大小：1,251 KB
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• 作者单位：XiaoXiao Zhang (1) (2)
  Xi Chen (1)
  YuHong Guo (2) (3)
  ZiFa Wang (2)
  LianYou Liu (4)
  Cottle Paul (5)
  ShengYu Li (1)
  HuaWei Pi (1) (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
  

文摘

Total suspended particulate (TSP, particle diameter?00 μm) was the dominant air pollutant and significantly 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 1986-012. 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.