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Infrasound oscillations caused by extratropical cyclones in the sea of Japane

Инфразвуковые колебания, вызываемые внетропическими циклонами в Японском море
Authors: Vladimir A. Chupin; Egor S. Gusev;

Infrasound oscillations caused by extratropical cyclones in the sea of Japane

Abstract

Выполнен краткий обзор работ авторов, выполнивших анализ обширной базы данных микродеформаций земной коры, в результате которого выявлено, что в общем фоне колебаний присутствуют микросейсмы сигнала верхней части инфразвукового диапазона (5–12 Гц) в периоды прохождения мощных тропических циклонов в акватории Японского моря. При обработке экспериментальных данных определены некоторые зависимости в появлении этих сигналов, а также локализованы области генерации в Японском море инфразвуковых колебаний при прохождении определенных тайфунов. Так как акватория Японского моря в холодное время года также подвергается влиянию циклонов, возникающих во внетропической области земного шара и временами достигающих значительной силы, было обработаны данные берегового лазерного деформографа, ведущего непрерывную запись, во время одного из таких событий, произошедшего в ноябре 2020 года. В результате исследования натурных данных берегового лазерного деформографа были обнаружены микросейсмы колебаний в верхней части инфразвукового диапазона, имеющие явную двухчастотную составляющую и проявляющиеся в момент развития циклона в северо-западной и центральной части Японского моря. Выполнено описание методики выполнения измерений микродеформаций земной коры стационарным двухкоординатным береговым лазерным деформографом и проведения их обработки. Определено, что развитие инфразвуковых колебаний не зависит от местной метеорологической обстановки. В статье выполнен краткий синоптический анализ развития циклонического вихря в Японском море. Обнаруженные инфразвуковые сигналы развиваются при достижении определенной силы ветра вдоль протяжённого атмосферного фронта в Японском море и достаточно быстро затухают в период начала быстрого смещения атмосферного фронта в центральную часть Японского моря при ускоряющемся поступлении холодных воздушных масс с севера. Характер проявления инфразвуковых сигналов при прохождении внетропического циклона отличается от подобных проявлений при более сосредоточенном воздействии тропических циклонов. A brief review of the works of the authors, who performed the analysis of an extensive database microdeformations of the Earth's crust. As a result of the analysis of experimental data, it was revealed that in the general background of oscillations there are microseisms signals in the high-frequency infrasound range (5–12 Hz) during the periods of the passage of powerful tropical cyclones in the Sea of Japan. As a result of the study of the coastal laser strainmeter data, microseisms of oscillations in the upper part of the infrasound range with a distinct dual-frequency component were detected and manifested during the extratropical cyclone development in the northwestern and central part of the Sea of Japan. The methods for measuring microdeformations of the Earth's crust by a stationary two-coordinate coastal laser strainmeter and their processing are described. It is determined that the development of infrasound oscillations does not depend on local meteorological conditions. A brief synoptic analysis of the development of a cyclonic vortex in the Sea of Japan is performed in the article. The detected infrasound signals develop when a certain wind strength is reached along an extended atmospheric front in the Sea of Japan and fade quickly enough during the beginning of rapid displacement of the atmospheric front to the central part of the Sea of Japan with accelerating inflow of cold air masses from the north. The character of the manifestation of infrasound signals during the passage of an extratropical cyclone differs from similar manifestations during a more concentrated impact of tropical cyclones.

Keywords

infrasound oscillations, Японское море, лазерный деформограф, Sea of Japan, ветер, laser strainmeter, wind, инфразвуковые колебания, микродеформации земной коры, внетропические циклоны, extratropical cyclones, microdeformations of the Earth crust

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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