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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">hydrophysics</journal-id><journal-title-group><journal-title xml:lang="ru">Фундаментальная и прикладная гидрофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Fundamental and Applied Hydrophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6673</issn><issn pub-type="epub">2782-5221</issn><publisher><publisher-name>St. Petersburg Research Center of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.7868/S2073667318010021</article-id><article-id custom-type="elpub" pub-id-type="custom">hydrophysics-737</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФУНДАМЕНТАЛЬНЫЕ ВОПРОСЫ ГИДРОФИЗИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>FUNDAMENTAL ISSUES OF HYDROPHYSICS</subject></subj-group></article-categories><title-group><article-title>Модуляция коротких инфрагравитационных волн приливом</article-title><trans-title-group xml:lang="en"><trans-title>Modulation of short infragravity waves by tide</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковалев</surname><given-names>П. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalev</surname><given-names>P. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Южно-Сахалинск</p></bio><email xlink:type="simple">d.kovalev@imgg.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ковалев</surname><given-names>Д. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Kovalev</surname><given-names>D. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Южно-Сахалинск</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт морской геологии и геофизики, Дальневосточного отделения РАН<country>Россия</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>15</day><month>11</month><year>2022</year></pub-date><volume>11</volume><issue>1</issue><fpage>21</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ковалев П.Д., Ковалев Д.П., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Ковалев П.Д., Ковалев Д.П.</copyright-holder><copyright-holder xml:lang="en">Kovalev P.D., Kovalev D.P.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://hydrophysics.spbrc.ru/jour/article/view/737">https://hydrophysics.spbrc.ru/jour/article/view/737</self-uri><abstract><p>Институт морской геологии и геофизики ДВО РАН проводит регулярную регистрацию волнения в прибрежной зоне о. Сахалин и Курильских островов с целью изучения инфрагравитационных волн и опасных морских явлений с использованием автономных донных регистраторов волнения (колебаний уровня моря). Используемая в приборах односекундная дискретность позволяет записывать не только инфрагравитационные волны, но зыбь и ветровые волны без искажений. В результате многолетних наблюдений за уровнем моря удалось обнаружить явление модуляции инфрагравитационных волн приливом на шельфе о. Сахалин. Анализ по натурным данным и численным моделям морских поверхностных гравитационных волн показал, что в прибрежной зоне при нелинейном взаимодействии волна-волна происходит передача энергии от низкочастотных длинных волн назад, к более высокочастотным движениям. Это объясняет приливную модуляцию энергии инфрагравитационных волн, наблюдаемую в записях придонного давления на южном шельфе о. Сахалин. Полученные результаты подтверждают возможность использования модели Лонге-Хиггинса и Стюарта для определения коэффициентов увеличения амплитуды и периода инфрагравитационных волн как в прибойной зоне, так и за ее пределами. Подобные изменения приливных пляжей распространены во всем мире и таким образом, приливная модуляция инфрагравитационной энергии в прибойной зоне может быть эффектом прибрежных процессов и региональной сейсмической активности во многих районах прибрежной зоны. Изучение рассматриваемых здесь процессов важно, поскольку инфрагравитационные волны способствуют формированию береговой линии.</p></abstract><trans-abstract xml:lang="en"><p>Institute of Marine Geology and Geophysics FEB RAS performs regular registration of sea waves in the coastal zone of Sakhalin Island and Kuril Islands for the purpose of investigating infragravity (IG) waves and dangerous marine phenomena using autonomous bottom wave loggers (sea level fluctuations). The one-second discreteness is used in devices and allows recording not only IG waves, but else swell and wind waves without distortion. As a result of longterm observations of sea level, it was possible to detect the phenomenon of IG waves modulation by the tides on the shelf of Sakhalin Island. Analysis from field data and numerical models of marine surface gravity waves showed that in the coastal zone the energy was transferred from the low-frequency waves to higher-frequency motions in the result of nonlinear wave-wave interaction. This explains the tidal modulation of the energy of the short infragravity waves, that was observed in the records of the bottom pressure on the southern shelf of the Sakhalin Island. The obtained results confirm the possibility of using the Longuet-Higgins and Stewart models for determining the coefficients for increasing the amplitude and the period of the IG waves both in the surf zone and outside it. Similar changes in tidal beaches are common throughout the world and thus, tidal modulation of IG energy in the surf zone can be an effect of coastal processes and regional seismic activity in many coastal areas. The study of the processes considered here is important, since IG waves contribute to the formation of the shoreline.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>инфрагравитационные волны</kwd><kwd>модуляция приливом</kwd><kwd>зыбь</kwd></kwd-group><kwd-group xml:lang="en"><kwd>infragravity waves</kwd><kwd>tidal modulation</kwd><kwd>swell</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Webb S. C., Zhang X., Crawford W. Infragravity waves in the deep ocean // J. Geophys. Res., 1991, 96, P. 2723—2736.</mixed-citation><mixed-citation xml:lang="en">Webb S. C., Zhang X., Crawford W. Infragravity waves in the deep ocean. J. Geophys. 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