Abstract

In summer 2018 along the route of the 71st cruise of RV Akademik Mstislav Keldysh in the North Atlantic we carried out the measurements of such atmospheric aerosol characteristics as aerosol optical depth, near-surface aerosol and black carbon concentrations, content of chemical elements in aerosol samples, and organic and elemental carbon, as well as the isotopic composition of black carbon. It is shown that the average values of most characteristics decrease severalfold during passage from the Baltic Sea to the North Atlantic (57°–60° N), and then to the Norwegian Sea. For instance, the average black carbon concentration decreased from 83 to 29 ng/m³. Episodic impact of continental aerosol was noted even in remote regions of ocean. Outflow of smokes from forest fires in the north of Canada to the region of measurements (southward of Greenland) had the strongest effect on aerosol characteristics. The average concentrations of chemical elements in aerosol composition over the North Atlantic were several times larger than in the Arctic region, and smaller than in the background region of Siberia.

中文翻译：

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RV Akademik Mstislav Keldysh第71次航行中大气气溶胶理化特性研究结果

摘要

在2018年夏季，沿着北大西洋RV Akademik Mstislav Keldysh的第71次航行路线，我们对大气气溶胶特征进行了测量，例如气溶胶光学深度，近地表气溶胶和黑碳浓度，气溶胶样品中化学元素的含量，有机碳和元素碳以及黑碳的同位素组成。结果表明，从波罗的海到北大西洋（北纬57°–60°）再到挪威海，大多数特征的平均值下降了几倍。例如，平均黑碳浓度从83降至29 ng / m ³。即使在海洋的偏远地区，也注意到大陆气溶胶的偶发性影响。加拿大北部森林大火向测量区域（格陵兰南部）流出的烟雾对气溶胶特性的影响最大。北大西洋上空气溶胶成分中化学元素的平均浓度比北极地区大几倍，比西伯利亚本底地区小。