Hydrological Structure and Water Dynamics in the Powell Basin in January–February 2022

R. Z. Mukhametianov; Мухаметьянов Р. З.; A. M. Seliverstova; Селиверстова А. М.; E. G. Morozov; Морозов Е. Г.; D. I. Frey; Фрей Д. И.; V. A. Krechik; Кречик В. А.; O. A. Zuev; Зуев О. А.

doi:10.31857/S0030157423040147

Hydrological Structure and Water Dynamics in the Powell Basin in January–February 2022

Autores: Mukhametianov R.¹^,2, Seliverstova A.¹, Morozov E.¹^,3^,2, Frey D.¹^,3^,2, Krechik V.¹^,4, Zuev O.¹
Afiliações:
1. Shirshov Institute of Oceanology, Russian Academy of Sciences
2. Moscow Institute of Physics and Technology
3. Marine Hydrophysical Institute, Russian Academy of Sciences
4. Immanuel Kant Baltic Federal University
Edição: Volume 63, Nº 4 (2023)
Páginas: 548-563
Seção: Физика моря
URL: https://journals.rcsi.science/0030-1574/article/view/136269
DOI: https://doi.org/10.31857/S0030157423040147
EDN: https://elibrary.ru/YIGHQE
ID: 136269

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Resumo

In January–February 2022, a CTD/LADCP section across the Powell Basin in the Weddell Sea with hydrochemical observations was carried out in the Antarctic expedition of the R/V “Akademik Mstislav Keldysh”. Transect was located from the Antarctic Peninsula to the South Orkney Islands; thus, it crossed the Weddell Gyre in its northwestern part. As a result, we collected new data about hydrological structure and water dynamics in this area. In this study, we present new results on the data analysis related to the structure of the Weddell Gyre, Antarctic Bottom Water formation, as well as variability of hydrophysical and hydrochemical characteristics of waters in the Powell Basin. Only two of the three currents, Antarctic Coastal Current and Antarctic Slope Front, were identified in the structure of the Weddell Gyre. Velocities of these currents were about 10–15 cm/s. The structure of waters was typical for the Weddell Sea, but a change in the temperature maximum was recorded in the layer of Warm Deep Water.

Palavras-chave

Powell Basin, water masses, CTD/LADCP section, oxygen, silicates

Bibliografia

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