Continental dust in the atmosphere of the Eastern Equatorial Pacific
Continental dust in the atmosphere of the Eastern Equatorial Pacific
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赤道东太平洋大气中的大陆尘埃
DOI：
10.1029/jc074i013p03362
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发表时间：
1969
影响因子：
--
通讯作者：
E. Bonatti
中科院分区：
文献类型：
--
作者：
J. Prospero;E. Bonatti
1967年春季，在赤道东太平洋8°N ~ 17°S和80°W ~ 110°W的范围内进行了大气尘埃取样。测得的粉尘浓度范围为0.04 ~ 1.2 μg/m3，最高浓度主要发生在5°~ 8°N之间。在赤道以北采集的样品的矿物学成分与较南的样品明显不同。北部沙尘以斜长石为主，石英次之；在南部的样品中，石英普遍存在，也有相当数量的云母、绿泥石和蒙脱石。所有样品都含有大量的有机物质。沿北部路径遇到的相对较高的沙尘负荷表明，风载沙尘可能对中美洲西部太平洋大片地区的沉积具有重要意义。
Atmospheric dust samples were collected on a cruise in the eastern equatorial Pacific during the spring of 1967 in the general area of 8°N to 17°S and 80°W to 110°W. The measured dust loads ranged from 0.04 to 1.2 μg/m3 air, the highest concentrations occurring principally along a track between 5° and 8°N. The mineralogical composition of the samples collected north of the equator differs markedly from the more southerly samples. The northern dust contains a plagioclase as the dominant mineral and subordinate amounts of quartz; in the southerly samples, quartz is prevalent and appreciable quantities of micas, chlorites, and smectites are also present. All samples contain significant amounts of organic material. The relatively high dust loadings encountered along the northern track suggest that windborne dust may be of significance to sedimentation in large areas of the Pacific to the west of Central America.