Saharan dust: Clay ratio as a relevant tracer to assess the origin of soil-derived aerosols
Saharan dust: Clay ratio as a relevant tracer to assess the origin of soil-derived aerosols
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DOI：
10.1029/98gl00569
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发表时间：
1998-04-01
影响因子：
5.2
通讯作者：
Chatenet, B
中科院分区：
文献类型：
--
作者：
Caquineau, S;Gaudichet, A;Chatenet, B
本研究的目的是找到一种示踪剂，允许检索的区域原产地的矿物粉尘撒哈拉气溶胶输送到北大西洋。由于物理和化学分馏过程发生在土壤-大气界面和大气传输的灰尘，粘土矿物物种似乎是最好的候选人。这项研究表明，伊利石和高岭石的相对丰度之间的比率（I/K比）是最敏感的参数，收集在萨尔岛（佛得角）的撒哈拉灰尘的区域起源。通过比较I/K比测量的灰尘从同一撒哈拉来源，并收集沿着其运输石油萨尔岛和巴巴多斯（加勒比海），我们表明，这一比例似乎保持不变后，长距离运输。
The aim of this study is to find a tracer allowing retrieval of the regional origin of mineral dust for Saharan aerosols transported over the North Atlantic Ocean. Because of physical and chemical fractionation processes occurring at the soil-atmosphere interface and during the atmospheric transport of dust, clay mineral species seem to be the best candidate. This study shows that the ratio between relative abundance of illite and kaolinite (I/K ratio) is the parameter that is the most sensitive to the regional origin of Saharan dust collected on Sal Island (Cape Verde). By comparing the I/K ratio measured in dust emitted from the same Saharan source and collected along its transport both oil Sal Island and Barbados (Caribbean Sea), we show that this ratio seems to remain unchanged after long-range transport.