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Water mass transformation in the Powell Basinстатья
- Авторы: Fedotova A.A., Stepanova S.V.
- Сборник: Antarctic Peninsula Region of the Southern Ocean. Oceanography and Ecology, Ed. by E.G. Morozov, M.V. Flint, V. A. Spiridonov
- Серия: Advances in Polar Ecology
- Том: 6
- Год издания: 2021
- Издательство: SPRINGER HEIDELBERG
- Местоположение издательства: TIERGARTENSTRASSE 17, HEIDELBERG, GERMANY,D-69121
- Первая страница: 115
- Последняя страница: 129
- Номер статьи: 8
- Аннотация: We analyze CTD and hydrochemical data from more than 30 oceanographic stations occupied during cruise 79 of the R/V Akademik Mstislav Keldysh(AMK-79) in January–February 2020. Sampling stations were organized into a spatial grid in the Powell Basin, Hesperides Trough, Phillip Ridge, Phillip Passage, South Orkney Plateau, and South Scotia Ridge. The paper includes preliminary results of the hydrological and hydrochemical research of water mass properties and their transformation in the region of Antarctic Bottom Water outfow. Three modifcations of Warm Deep Water with various thermohaline and hydrochemical characteristics were observed in various parts of the Powell Basin; we suggest that they have dissimilar mechanisms of formation. We propose a concept of Weddell Sea Slope Water that is a result of the mixing of shelf waters formed in the Weddell Sea and Warm Deep Water over the slope south of the Joinville Ridge and research the hydrological role of its infow into the Powell Basin. The admixture of Weddell Sea Slope Water to Weddell Sea Deep Water transforms water properties at depths of 1500–2500 m over the slope in the Powell Basin. Weddell Sea Deep Water is getting fresher, but colder and denser, than observed in the central deep part of the Powell Basin. We introduce a scheme of pathways of regional water masses based on the analysis of AMK-79 data, high-resolution historical CTD data from World Ocean Database 2018, and literature sources.
- Добавил в систему: Федотова Алина Андреевна