Internal waves generated by explosive eruptions of underwater volcanoes and their effect on the sea surface

T. Talipova, E. Pelinovsky and E. Didenkulova ()
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T. Talipova: A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences
E. Pelinovsky: A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences
E. Didenkulova: A.V. Gaponov-Grekhov Institute of Applied Physics of the Russian Academy of Sciences

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2025, vol. 121, issue 1, No 26, 675 pages

Abstract: Abstract An analysis of internal waves arising in a two-layer fluid during an explosive eruption of an underwater volcano is performed. Processes occurring in the near zone are parameterized by the initial source in the form of a displacement of the water column, as proposed by Le Méhaute (Mehaute, Adv Hydrosci 7:1–79, 1971). Then the linear problem is solved, and the features of internal waves are determined depending on the ratio of layer thicknesses, source radius, and distance to the source. The calculated wave field has the form of frequency-modulated groups, where the leading group has the maximum amplitude. The wave of maximum height in this train arrives much later than the weak leading wave, which makes it possible to prepare for the approach of dangerous waves. Estimates of the horizontal speed of currents on the sea surface caused by internal waves have been carried out. It was shown that internal waves can cause noticeable variations in wind ripples detected by remote sensing.

Keywords: Internal waves; Surface waves; Tsunami; Stratified ocean; Volcano eruption; Le Méhaute’s parametric model (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1007/s11069-024-06851-3

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