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Russian Journal of Earth Sciences
Journals / Russian Journal of Earth Sciences / Volume 24 Issue 1 / Seiche Dynamics in the Azov Sea Current System
UDC
55 550.34 550.383
CSCSTI
37.01 37.15 37.25 37.31 38.01
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36.00 37.00 38.00 39.00 52.00
Russian Classification of Professions by Education
05.00.00
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63
Russian Library and Bibliographic Classification
26
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VAK Russia
1.6

SEICHE DYNAMICS IN THE AZOV SEA CURRENT SYSTEM Seiche Dynamics in the Azov Sea Current System

Published in Russian Journal of Earth Sciences · Pages 1–9 · Rubric: 25th anniversary of the Russian Journal of Earth Sciences
DOI: https://doi.org/10.2205/2024ES000890
Received: 15.10.2023 Accepted: 15.01.2024 Published: 29.02.2024 Language of publication: ENG
Authors
GE
Gennadiy Matishov
ORCID
KL
Klim Grigorenko
ORCID
ABSTRACT
The paper presents new results of an investigations of the cyclic currents of the Azov Sea. Using offshore and onshore surveys at buoy ADCP-stations the separation of the characteristic features of water transport in different areas of the Taganrog Bay was shown. Expeditionary observations showed that despite of the drift-gradient nature, the resulting current has the direction of the Don runoff current. Direct coastal measurements showed that the runoff current significantly predominates on the spits of the southern coast of Taganrog Bay. Seiche pulsations manifest themselves as a two to three-hour slowdown of the main flow at diurnal intervals. The division of the areas of the Taganrog Bay according to the trajectories of water movement is noticeable. The eastern part has a predominantly river regime of water circulation. In the central part the meridional component of seiche currents plays an important role in water mixing. The marine regime of water mixing prevails in the western part of the Taganrog bay. Test calculations show that the classical tidal analysis program T_TIDE is applicable with caution for the Sea of Azov. The visually observed diurnal and semi-diurnal sea level rises represent a superposition of waves of different natures. The results of the work correspond to the known patterns of energy exchange between the atmosphere and the ocean. Even weak winds lead to the development of wave processes at eigen frequencies close to tidal ones. Increasing winds contribute to the intensification of wave fluctuations and significant transfer of water during strong surges.
KEYWORDS
the Azov Sea, the Taganrog Bay, tideless basins, seiches, positive and negative water setups, ADCP-measurements, lithodynamics, sea currents
Funding
The publication was prepared as part of the implementation of the research work of the State task of the Southern Scientific Center of the Russian Academy of Sciences No. 122103100027-3 “Investigation of the hydroclimatic features of periodically drying up water areas of southern Russia in the context of the global carbon cycle”; 123071900007-8 “Development of a system of climatic and environmental monitoring of the Azov Sea and ensuring its functioning”; and agreement No. 72-223/VIPGZ-23 dated 04/03/2023 between IO RAS and SSC RAS within the framework of Consortium 2.
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