Internal Waves Near Half Moon Island, South Shetland Islands

O. S. Mekhova; Мехова О. С.; D. A. Smirnova; Смирнова Д. А.; E. G. Morozov; Морозов Е. Г.; S. A. Ostroumova; Остроумова С. А.; D. I. Frey; Фрей Д. И.

doi:10.31857/S003015742304010X

Internal Waves Near Half Moon Island, South Shetland Islands

Authors: Mekhova O.S.¹^,2, Smirnova D.A.¹^,3, Morozov E.G.¹^,4, Ostroumova S.A.¹^,5, Frey D.I.¹^,4^,6
Affiliations:
1. Shirshov Institute of Oceanology, Russian Academy of Sciences
2. St. Petersburg State University
3. Moscow State University
4. Moscow Institute of Physics and Technology
5. Russian State Hydrometeorological University
6. Marine Hydrophysical Institute, RAS
Issue: Vol 63, No 4 (2023)
Pages: 564-575
Section: Физика моря
URL: https://journal-vniispk.ru/0030-1574/article/view/136270
DOI: https://doi.org/10.31857/S003015742304010X
EDN: https://elibrary.ru/YISXGY
ID: 136270

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Abstract
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Abstract

We analyze 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. The measurements were carried out on January 25, 2022 for four hours using a line of temperature and pressure sensors, along with the measurements with a CTD probe. Temperature fluctuations according to the sensors of the thermal line and the probe showed that the amplitude of internal waves is close to 5 m, sometimes reaching 15 m. According to the results of calculations of the global tidal model TPXO9, irregular semidiurnal tides predominate in the study area. Numerical calculations of the parameters of internal waves show that the baroclinic tide generated on a steep slope breaks up into higher frequency waves.

Keywords

internal waves, Bransfield Strait, model calculation, spectra

References

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