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Internal Waves near Half Moon Island, South Shetland Islands

  • MARINE PHYSICS
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Oceanology Aims and scope

Abstract—

Internal waves based on measurements on cruise 87 of the R/V Akademik Mstislav Keldysh in the Bransfield Strait near Half Moon Island and calculations using a numerical model are analyzed. The measurements were carried out on January 25, 2022 over 4 h using a line of temperature and pressure sensors along with CTD probe measurements. Temperature fluctuations based on the data from these sensors showed that the amplitude of internal waves was close to 5 m, sometimes reaching 15 m. Irregular semidiurnal tides predominate in the study area based on the calculation results using the TPXO9 global tidal model. Numerical calculations of the internal wave parameters show that the baroclinic tide generated on a steep slope breaks up into higher frequency waves.

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Funding

The study was carried out within state task FMWE-2022-0001 (ship expenses and equipment preparation) and with the support of the Russian Science Foundation, grant no. 22-77-10004 (analysis of field data and modeling of internal waves).

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Authors and Affiliations

  1. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia

    O. S. Mekhova, D. A. Smirnova, E. G. Morozov, S. A. Ostroumova & D. I. Frey

  2. St. Petersburg State University, St. Petersburg, Russia

    O. S. Mekhova

  3. Moscow State University, Moscow, Russia

    D. A. Smirnova

  4. Moscow Institute of Physics and Technology, Dolgoprudny, Mosсow region, Russia

    E. G. Morozov & D. I. Frey

  5. Russian State Hydrometeorological University, St. Petersburg, Russia

    S. A. Ostroumova

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

    D. I. Frey

Authors
  1. O. S. Mekhova
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  2. D. A. Smirnova
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  3. E. G. Morozov
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  4. S. A. Ostroumova
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  5. D. I. Frey
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Corresponding author

Correspondence to E. G. Morozov.

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Translated by E. Morozov

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Mekhova, O.S., Smirnova, D.A., Morozov, E.G. et al. Internal Waves near Half Moon Island, South Shetland Islands. Oceanology 63, 486–496 (2023). https://doi.org/10.1134/S0001437023040100

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