Specific features of tidal exchange in the Kuril straits according to modeling data
https://doi.org/10.55959/MSU0579-9414.5.79.4.4
Abstract
Specific features of tidal fluctuations of sea level and tidal currents in the straits of the Kuril Islands are studied using numerical modeling. Two-time intervals, i. e. 02.06.1977–03.06.1977 and 11.10.1977–12.10.1977, were taken to compare the parameters of tropical and equatorial tides. The simulation results were verified with the field data. It was found that the straits of the northeastern part of the Kuril Ridge have a mixed type of tides with a predominance of the diurnal course, and in the southwestern part a semi-diurnal course prevails. The highest tides (up to 2,5–3 m) in the study period were observed on 02.06.1977 near the Kamchatka Peninsula and the Hokkaido Island, as well as large islands of the Kuril Ridge. Four main oscillation periods of 12, 12,4, 24 and 25,8 hours were identified, which corresponds to the S2, M2, K1 and O1 harmonics. Analysis of the data obtained showed that the maximum velocities of the depth-averaged currents reach 4,5 m/s. The highest speeds were recorded in the Kruzenshtern, Frieze and Sredny Straits. Estimates of the tidal flow have shown that semi-daily fluctuations are more pronounced in the straits with lower average depths during a tropical tide. In deeper straits, semi-daily fluctuations at tropical tides are very weak or absent at all, an example is the Bous[1]sol Strait. It is calculated that when using a two-dimensional model, the maximum values of the tidal flow are observed in the Boussol Strait, reaching ~40 Sverdrups (Sv).
Supporting agencies: The work was carried out within the framework of the state assignment “Comprehensive studies of the current state of the waters of the World Ocean”, number CITIS 121031900090-6
About the Authors
V. I. Iljin
Lomonosov Moscow State University
Russian Federation
Russian Federation
V.I. Iljin -Student, Faculty of Geography, Department of Oceanology
V. S. Arkhipkin
Lomonosov Moscow State University
Russian Federation
Russian Federation
V.S. Arkhipkin - Associate professor, Ph.D. in Geography, Faculty of Geography, Department of Oceanology
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Review
For citations:
Iljin V.I., Arkhipkin V.S. Specific features of tidal exchange in the Kuril straits according to modeling data. Lomonosov Geography Journal. 2024;(4):44-54. (In Russ.) https://doi.org/10.55959/MSU0579-9414.5.79.4.4
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