Abstract

Reconstruction of bottom currents has been performed for the first time using the distribution of sedimentary waves in the Novaya Zemlya Trough in the Kara Sea based on the data from cruises 69, 72, and 81 of the R/V Akademik Mstislav Keldysh in 2017, 2018, and 2020. This work was completed within the program of the Shirshov Institute of Oceanology, Russian Academy of Sciences, “Ecosystems of the Siberian Arctic Seas.” The fields of sedimentary waves were identified; their orientation, morphology, the heights of waves, and the wavelengths were determined; and the conclusion was reached that they are formed due to the bottom currents. It was assumed that these currents are slope flows resulting from cascading. Cascading can appear in winter on the shelf during the formation of dense bottom water, which descends along the sloping bottom towards the Novaya Zemlya Trough, or during the inflow of denser Barents Sea waters into the Kara Sea through the Kara Gates Strait.

中文翻译：

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喀拉海新地岛海槽沉积波与底流重建

摘要

根据R/V Akademik Mstislav Keldysh 69、72、81号航次数据，首次利用喀拉海新地岛海槽沉积波分布重建底流2017 年、2018 年和 2020 年。这项工作是在俄罗斯科学院希尔绍夫海洋研究所“西伯利亚北冰洋生态系统”项目内完成的。确定了沉积波场；确定了它们的方向、形态、波的高度和波长；并得出结论，它们是由底部电流形成的。假定这些电流是由级联产生的斜坡流。冬季在形成致密底水的过程中，陆架上会出现级联，底水沿着倾斜的底部向新地海槽下降，或者在较稠密的巴伦支海水域通过卡拉盖茨海峡流入喀拉海期间。