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

Zhenxing Shen, Junji Cao, Xuxiang Li, Tomoaki Okuda, Yaqiang Wang, Xiaoye Zhang

Research output: Contribution to journalArticle

22 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)291-298
Number of pages8
JournalAdvances in Atmospheric Sciences
Volume23
Issue number2
DOIs
Publication statusPublished - 2006 Mar

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chlorite
kaolinite
aerosol
dust
dust storm
halite
illite
air mass
amphibole
gypsum
feldspar
dolomite
calcite
desert
wind velocity
trajectory
X-ray diffraction
Asia
quartz
mineral

Keywords

  • Clay ratio
  • Mass concentration
  • Mineralogical composition
  • Soil dust

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Mass concentration and mineralogical characteristics of aerosol particles collected at Dunhuang during ACE-Asia. / Shen, Zhenxing; Cao, Junji; Li, Xuxiang; Okuda, Tomoaki; Wang, Yaqiang; Zhang, Xiaoye.

In: Advances in Atmospheric Sciences, Vol. 23, No. 2, 03.2006, p. 291-298.

Research output: Contribution to journalArticle

Shen, Zhenxing ; Cao, Junji ; Li, Xuxiang ; Okuda, Tomoaki ; Wang, Yaqiang ; Zhang, Xiaoye. / Mass concentration and mineralogical characteristics of aerosol particles collected at Dunhuang during ACE-Asia. In: Advances in Atmospheric Sciences. 2006 ; Vol. 23, No. 2. pp. 291-298.
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