Element and mineral characterization of dust emission from the saline land at Songnen Plain, Northeastern China

作     者：CHEN Bing KITAGAWA Hiroyuki HU Ke JIE Dongmei YANG Junpeng LI Jingmin 

作者机构：Department of Hydrospheric-Atmospheric Sciences Graduate School of Environmental Studies Nagoya University Nagoya 464-8601 Japan. Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China College of Earth Sciences Jilin University Changchun 130061 China School of Marine Science China University of Geosciences Beijing 100038 China College of Urban and Environmental Sciences Northeast Normal University Changchan 130024 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2009年第21卷第10期

页      面：1363-1370页

核心收录：

学科分类：070904[理学-构造地质学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 082803[工学-农业生物环境与能源工程] 0709[理学-地质学] 07[理学] 08[工学] 0828[工学-农业工程] 

基　　金：supported in a part by Chinese National Key Project of Basic Research (No G2000048703) the Grant-in-Aid for Scientific Research (No 16310008,18403002) from the Ministry of Education, Culture,Sports, Science and Technology, Japan 

主　　题：element geochemistry individual particle analysis Asian dust dust storm saline soil land degradation 

摘      要：Recent observations of Asian dust storms show an eastern expansion of the source area to degraded lands, where dust emissions have been little studied. The dust concentrations over the saline land of the western Songnen Plain （SSL）, Northeastern China, are circumstantially higher than those from the northwestern Chinese deserts. These concentrations are sensitive to the surface soil conditions and wind velocity on the ground. The dust samples collected during dust storm events on the SSL contain abundant Na, Mg, A1, K, Ca, Fe and Ti, as well as toxic elements such as Cu, V, Zn and Ba. Individual particle analysis reveals that fine saline particles （〈 10 μm in diameter） on the saline land, consisting largely of carbonate, halite and sulfate together with lithogenic minerals such as SiO2 and aluminosilicate, are eventually uplifted during the interval from spring to autuum. The predominantly fine saline particles uplifted from the SSL are likely transported eastward by the winter monsoon circulation and westerlies. Recent degradation of saline lands in Northeastern China would not only increase the frequency of dust storm events in the downwind area, but also might change the chemical composition of the Asian dust emissions.