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Seiche Currents in the Sea of Azov Based on Field Observations

  • MARINE PHYSICS
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Oceanology Aims and scope

Abstract

The paper presents the results of autumn–winter surveys of the thermohaline structure and currents of Taganrog Bay in the Sea of Azov in 2021. The seiche periods of the sea proper are estimated from spectral analysis of Temryuk level detector data. The spectra of level oscillations in Yeysk and Donskoy are compared. A conclusion is made about cyclically recurring seiche currents predominating over wind currents. The eigen resonance mode (uninodal seiche) in the eastern part of Taganrog Bay has a period of 12 h; in the central and western parts, 24 h; in the Sea of Azov proper, 38 h. Estimates are confirmed analytically by current measurements and level detectors. In practice, this means that with the strongest positive and negative water setups in 12–24 h, with a constant wind, the direction of the current will change to the opposite. The described nature of the circulation, on the one hand, distinguishes the Sea of Azov from other similar water bodies, and on the other, it makes it possible to reveal the energy potential of the basin in an unusual way.

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Funding

The study was carried out as part of the state task of SSC RAS “Southern Seas of Russia and Their Watersheds: Current State and Long-Term Variability under Conditions of Global Climatic Impacts and Industrial Challenges in order to Assess Resources and Ensure the Security of the Country’s Spatial Development” topic state registration no. 122011900153-9, on research expedition vessels and equipment of the Central Collective Use Center of SSC RAS no. 501994.

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Correspondence to K. S. Grigorenko.

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Matishov, G.G., Grigorenko, K.S. Seiche Currents in the Sea of Azov Based on Field Observations. Oceanology 63, 27–34 (2023). https://doi.org/10.1134/S0001437023010095

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  • DOI: https://doi.org/10.1134/S0001437023010095

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