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Advances in Atmospheric Sciences

, Volume 23, Issue 2, pp 291–298 | Cite as

Mass concentration and mineralogical characteristics of aerosol particles collected at Dunhuang during ACE-Asia

  • Shen Zhenxing  (沈振兴)
  • Cao Junji  (曹军骥)
  • Li Xuxiang  (李旭祥)
  • Tomoaki Okuda
  • Wang Yaqiang  (王亚强)
  • Zhang Xiaoye  (张小曳)
Article

Abstract

Measurements were performed in spring 2001 and 2002 to determine the characteristics of soil dust in the Chinese desert region of Dunhuang, one of the ground sites of the Asia-Pacific Regional Aerosol Characterization Experiment (ACE-Asia). The mean mass concentrations of total suspended particle matter during the spring of 2001 and 2002 were 317 µg m−3 and 307 µg m−3, respectively. Eleven dust storm events were observed with a mean aerosol concentration of 1095 µg m−3, while the non-dusty days with calm or weak wind speed had a background aerosol loading of 196 µg m−3 on average in the springtime. The main minerals detected in the aerosol samples by X-ray diffraction were illite, kaolinite, chlorite, quartz, feldspar, calcite and dolomite. Gypsum, halite and amphibole were also detected in a few samples. The mineralogical data also show that Asian dust is characterized by a kaolinite to chlorite (K/C) ratio lower than 1 whereas Saharan dust exhibits a K/C ratio larger than 2. Air mass back-trajectory analysis show that three families of pathways are associated with the aerosol particle transport to Dunhuang, but these have similar K/C ratios, which further demonstrates that the mineralogical characteristics of Asian dust are different from African dust.

Key words

soil dust mass concentration mineralogical composition clay ratio 

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Copyright information

© Science Press 2006

Authors and Affiliations

  • Shen Zhenxing  (沈振兴)
    • 1
    • 2
  • Cao Junji  (曹军骥)
    • 2
  • Li Xuxiang  (李旭祥)
    • 1
  • Tomoaki Okuda
    • 3
  • Wang Yaqiang  (王亚强)
    • 4
  • Zhang Xiaoye  (张小曳)
    • 4
  1. 1.Department of Environmental Science and EngineeringXi’an Jiaotong UniversityXi’anChina
  2. 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth EnvironmentChinese Academy of SciencesXi’anChina
  3. 3.Department of Applied ChemistryKeio UniversityYokohamaJapan
  4. 4.Chinese Academy of Meteorological SciencesBeijingChina

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