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Mass Concentration and Mineralogical Characteristics of Aerosol Particles Collected at Dunhuang During ACE-Asia
作者姓名:沈振兴  曹军骥  李旭祥  王亚强  张小曳
作者单位:Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075,State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075,Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049,Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku,Yokohama 223-8522,Chinese Academy of Meteorological Sciences, Beijing 100081,Chinese Academy of Meteorological Sciences, Beijing 100081
基金项目:Acknowledgments. The authors are very grateful to the anonymous reviewers for their constructive suggestions and comments. This research was supported by the National Natural Science Foundation of China (Grant No. 40405023), the Chinese National Key Project of Basic Research (Grant G2004CB720200), the Science Foundation of Xi'an Jiaotong University (Grant No. XJJ2004006) and a grant from the State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Chinese Academy of Sciences.
摘    要: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 μgm?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.

关 键 词:粘土  土壤灰尘  矿物  敦煌市  大气污染物
收稿时间:2005-05-11
修稿时间:2005-07-06

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.Mass Concentration and Mineralogical Characteristics of Aerosol Particles Collected at Dunhuang During ACE-Asia[J].Advances in Atmospheric Sciences,2006,23(2):291-298.
Authors:Zhenxing Shen  Junji Cao  Xuxiang Li  Tomoaki Okuda  Yaqiang Wang  Xiaoye Zhang
Affiliation:(1) Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an, 710049, China;(2) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710075, China;(3) Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan;(4) Chinese Academy of Meteorological Sciences, Beijing, 100081, China
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.
Keywords:soil dust  mass concentration  mineralogical composition  clay ratio
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