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首页> 外文期刊>Environmental Science & Technology >Gypsum and Other Calcium-Rich Aerosol Particles above the North Sea
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Gypsum and Other Calcium-Rich Aerosol Particles above the North Sea

机译：北海上方的石膏和其他富含钙的气溶胶颗粒

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摘要

Ca-containing particles, especially CaSO_4 particles, have been encountered in several atmospheric aerosol studies. An overview is given of the different sources of airborne Ca-containing particles. The North Sea atmosphere is studied to identify the different Ca-containing particle types and to find the correlation between their occurrence and the source regions of the corresponding air masses. About 50 000 individual aerosol samples were collected above the Southern Bight of the North Sea for several wind directions and analyzed for their composition using electron probe X-ray microanalysis. Nonhierar-chical cluster analysis is performed on the data to reveal the different particle types, their relative abundances and their sources. CaSO_4 in most cases constitutes the largest fraction of the Ca-containing particles. Extremely high numbers of CaSO_4 particles are found for northeastern winds, coming from the central part of Germany, suggesting that a great fraction is derived from anthropogenic sources located in this region. Among the other Ca-containing particle types are the aluminosilicates, CaCO_3, Fe—Ca-rich particles, and CaSO_4 or CaCO_3 in combination with NaCl.
机译：在一些大气气溶胶研究中遇到了含Ca的颗粒，尤其是CaSO_4颗粒。概述了空气中含钙颗粒的不同来源。对北海大气进行了研究，以确定不同的含Ca颗粒类型，并找到它们的出现与相应气团源区域之间的相关性。在北海南部海岸线上方收集了大约5万个单独的气溶胶样品，用于多个风向，并使用电子探针X射线微分析法对其成分进行了分析。对数据进行了非层次聚类分析，以揭示不同的粒子类型，其相对丰度和来源。在大多数情况下，CaSO 4占含钙颗粒的最大部分。来自德国中部的东北风中发现了大量的CaSO_4颗粒，这表明很大一部分来自该地区的人为来源。在其他含Ca的颗粒类型中，有铝硅酸盐，CaCO_3，富含Fe-Ca的颗粒以及与NaCl结合的CaSO_4或CaCO_3。

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