Abstract—In January–February 2022, a CTD/LADCP section with hydrochemical observations was made across the Powell Basin in the Weddell Sea on an Antarctic expedition of the R/V Akademik Mstislav Keldysh. The section extended from the Antarctic Peninsula to the South Orkney Islands; thus, it crossed the Weddell Gyre in its northwestern part. As a result, new data were acquired on the hydrological and hydrochemical structures and water dynamics in this region. This study presents new results on analysis of data related to the structure of the Weddell Gyre, formation of Antarctic Bottom Water, and variability of hydrophysical and hydrochemical characteristics of water in the Powell Basin. Only two of the three currents were identified in the structure of the Weddell Gyre: the Antarctic Coastal Current and Antarctic Slope Front,. The velocities of these currents were about 10–15 cm/s. The structure of waters was typical of the Weddell Sea, but a change in the temperature maximum was recorded in the Warm Deep Water layer.
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This study was supported by state task FMWE-2021-0002 (field data collection and processing) and the Russian Science Foundation, grant no. 21-77-20004 (analysis of field data and databases and interpretation of data).
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Mukhametianov, R.Z., Seliverstova, A.M., Morozov, E.G. et al. Hydrological Structure and Water Dynamics in the Powell Basin in January–February 2022. Oceanology 63, 472–485 (2023). https://doi.org/10.1134/S0001437023040136
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DOI: https://doi.org/10.1134/S0001437023040136