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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">tinro</journal-id><journal-title-group><journal-title xml:lang="ru">Известия ТИНРО</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya TINRO</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1606-9919</issn><issn pub-type="epub">2658-5510</issn><publisher><publisher-name>ТИНРО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26428/1606-9919-2023-203-601-617</article-id><article-id custom-type="elpub" pub-id-type="custom">tinro-862</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>УСЛОВИЯ ОБИТАНИЯ ПРОМЫСЛОВЫХ ОБЪЕКТОВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ENVIRONMENTS OF FISHERIES RESOURCES</subject></subj-group></article-categories><title-group><article-title>Межгодовая изменчивость термического состояния верхнего квазиоднородного слоя Берингова моря в зимний период</article-title><trans-title-group xml:lang="en"><trans-title>Interannual variability in thermal state of the upper mixed layer in the Bering Sea in winter</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4136-302X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лучин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Luchin</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лучин Владимир Александрович, доктор географических наук, ведущий научный сотрудник</p><p>690041, г. Владивосток, ул. Балтийская, 43</p></bio><bio xml:lang="en"><p>Vladimir A. Luchin, D.Sc., leading researcher</p><p>43, Baltiyskaya Street, Vladivostok, 690041</p></bio><email xlink:type="simple">vluchin@poi.dvo.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тихоокеанский океанологический институт им. В.И. Ильичева ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch of Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>11</day><month>10</month><year>2023</year></pub-date><volume>203</volume><issue>3</issue><fpage>601</fpage><lpage>617</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лучин В.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Лучин В.А.</copyright-holder><copyright-holder xml:lang="en">Luchin V.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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://izvestiya.tinro-center.ru/jour/article/view/862">https://izvestiya.tinro-center.ru/jour/article/view/862</self-uri><abstract><p>Особенности структуры межгодовой изменчивости термического состояния верхнего квазиоднородного слоя (ВКС) в холодный период года (с декабря по март) на свободной ото льда акватории Берингова моря рассмотрены на основании всех доступных к настоящему времени материалов глубоководных океанографических наблюдений (12 430 станций за период с 1943 по 2022 г.). Впервые (по данным временного коэффициента первой компоненты разложения полей по эмпирическим ортогональным функциям (ЭОФ), отражающей синхронные колебания на всей акватории) выделен статистически значимый линейный тренд, свидетельствующий о потеплении вод ВКС Берингова моря зимой за 1958−2022 гг. По результатам спектрального анализа выделены статистически значимые колебания: у первой компоненты разложения полей по ЭОФ — от квазидвухлетних до 17−20 лет, а у второй — квазидвухлетние и 3–4-летние. Линии полиномиальных трендов первой и второй компонент разложения по ЭОФ свидетельствуют о возможности существования более длительных колебаний (соответственно до 30 и 40 лет). В термическом состоянии ВКС (согласно предложенным критериям) выделены «экстремально холодные», «холодные», «нормальные» и  «теплые» годы, а «экстремально теплых» лет выявлено не было.</p></abstract><trans-abstract xml:lang="en"><p>Year-to-year variations of temperature in the upper mixed layer are considered for the ice-free waters of the Bering Sea in cold season (from December to March) using all data of the deep-sea oceanographic observations available to date (12,430 stations for the period from 1943 to 2022). Series of annual mean ﬁelds of the mixed layer temperature in December-March were decomposed by applying the empirical orthogonal function (EOF); dynamics of the ﬁrst two components of decomposition (described in sum 50.4 % of the initial ﬁelds variability) are analyzed. The ﬁrst component (32.4 % of variation) indicates synchronous oscillations over the entire sea area with the maximum contribution at the continental slope. The second component (18.0 % of variance) reﬂects opposite oscillations in two vast regions of the sea located along the continental slope from Cape Navarin to Alaska Peninsula and in the western, central and southern parts of the deep basin. The following statistically signiﬁcant periodic oscillations are revealed by spectral analysis: quasi-biennial and those with periods of 4, 7, and 17–20 year for the 1st EOF and quasi-biennial and those with periods of 3 and 4 year for the 2nd EOF. A statistically signiﬁcant linear trend to warming is detected for the time coefﬁcient of the 1st EOF in the period of 1958–2022. Approximation of this coefﬁcient dynamics with 6-degree polynomial function (polynomial trend) shows a tendencies to the mixed layer cooling in winters of 1969–1972 and 1992–2004 but the opposite tendencies to warming in 1973–1991 and 2005–2022. Variations of time coefﬁcient for the 2nd EOF correspond to opposite tendencies in the areas with positive and negative values of this EOF. For the period from 1958 to 2022, winters in the Bering Sea are classiﬁed by the mixed layer temperature, taking into account the contribution of the 1st EOF only, as «warm» (1958, 1959, 1963, 1964, 1966, 1979, 1982, 1985, 1987, 1997, 2001, 2003, 2004, 2015–2018, 2020, and 2022), «normal» (1960–1962, 1965, 1967, 1968, 1970, 1971, 1974, 1978, 1980, 1981, 1983, 1986, 1989–1994, 1996, 1998, 2005–2007, 2011, 2013, 2014, 2019, and 2021), «cold» (1969, 1972, 1973, 1975–1977, 1984, 1988, 1995, 1999, 2000, 2002, 2008, and 2010), and extremely cold (2009 and 2012).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Берингово море</kwd><kwd>океанологические наблюдения</kwd><kwd>температура морской воды</kwd><kwd>верхний квазиоднородный слой</kwd><kwd>разложение полей по эмпирическим ортогональным функциям (ЭОФ)</kwd><kwd>межгодовая изменчивость</kwd><kwd>«холодные» годы</kwd><kwd>«нормальные» годы</kwd><kwd>«теплые» годы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Bering Sea</kwd><kwd>oceanographic observations</kwd><kwd>water temperature</kwd><kwd>upper mixed layer</kwd><kwd>EOF decomposition</kwd><kwd>year-to-year variation</kwd><kwd>cold year</kwd><kwd>normal year</kwd><kwd>warm year</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках госбюджетной темы НИР ТОИ ДВО РАН «Исследование основных процессов, определяющих состояние и изменчивость океанологических характеристик окраинных морей Азии и прилегающих районов Тихого и Индийского океанов», рег. № 121021700346-7. Автор выражает искреннюю благодарность рецензентам за их конструктивные замечания и предложения по корректировке текста статьи.</funding-statement><funding-statement xml:lang="en">The study is carried out within the framework of the state budget topic of Paciﬁc Oceanological Institute “Study of the main processes that determine the state and variability of oceanological characteristics in the marginal seas of Asia and adjacent areas of the Paciﬁc and Indian Oceans”, No. 121021700346-7. The author is sincerely gratitude to reviewers of the manuscript for their constructive comments and useful suggestions for the text correction.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Арсеньев В.С. 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