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Estimating Climate Trends of the Powell Basin’s Hydrophysical Characteristics

  • MARINE PHYSICS
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Oceanology Aims and scope

Abstract—The trend of the dynamic state of Powell Basin waters in the Weddell Sea is estimated based on hydrological data from cruise 79 of the R/V Akademik Mstislav Keldysh (January 16–February 6, 2020) and World Ocean Database-2018 data for January–February 1975–2020. At each node of a quarter-degree grid, a linear trend was plotted for the calculated values of the maximum buoyancy frequency and maximum amplitude of the vertical internal wave velocity component. It is shown that the southwestern and northwestern parts of the Powell Basin differ significantly in their hydrophysical characteristics. In the northwest, the linear trend of the maximum buoyancy frequency is negative, while the depth trends of the maximum values of the Väisälä–Brunt frequency and amplitude of the vertical velocity component are positive. In the southwestern part of the basin, the opposite is true: the trend of the maximum buoyancy frequency is positive, while the trends in the depths of the maximum values of the Väisälä–Brunt frequency and the amplitude of the vertical velocity component are negative.

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Funding

The study was carried out with a state task (topic no. FNNN-2022-0001).

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Authors and Affiliations

  1. Marine Hydrophysical Institute, Russian Academy of Sciences, Sevastopol, Russia

    A. A. Bukatov, N. M. Solovei & E. A. Pavlenko

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  1. A. A. Bukatov
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  2. N. M. Solovei
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  3. E. A. Pavlenko
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Correspondence to N. M. Solovei.

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Bukatov, A.A., Solovei, N.M. & Pavlenko, E.A. Estimating Climate Trends of the Powell Basin’s Hydrophysical Characteristics. Oceanology 63, 464–471 (2023). https://doi.org/10.1134/S0001437023040021

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  • DOI: https://doi.org/10.1134/S0001437023040021

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