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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">ellibs</journal-id><journal-title-group><journal-title xml:lang="ru">Электронные библиотеки</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Digital Libraries Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">1562-5419</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/1562-5419-2024-27-6-1090-1108</article-id><article-id custom-type="elpub" pub-id-type="custom">ellibs-539</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Анализ внутригодовой изменчивости потоков тепла в Северной Атлантике на основе аппроксимации траекторий стохастического диффузионного процесса</article-title><trans-title-group xml:lang="en"><trans-title>Analysis of Intra-Annual Variability of Heat Fluxes in the North Atlantic Based on Approximation of Trajectories of the Stochastic Diffusion Process</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>Тучкова</surname><given-names>Наталия Павловна</given-names></name><name name-style="western" xml:lang="en"><surname>Tuchkova</surname><given-names>Natalia Pavlovna</given-names></name></name-alternatives><email xlink:type="simple">natalia_tuchkova@mail.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>Беляев</surname><given-names>Константин Павлович</given-names></name><name name-style="western" xml:lang="en"><surname>Belyaev</surname><given-names>Konstantin Pavlovich</given-names></name></name-alternatives><email xlink:type="simple">kosbel55@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михайлов</surname><given-names>Гурий Михайлович</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhaylov</surname><given-names>Gury Mickailovich</given-names></name></name-alternatives><email xlink:type="simple">gmickail@ccas.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>Ромашина</surname><given-names>Ксения Алексеевна</given-names></name><name name-style="western" xml:lang="en"><surname>Romashina</surname><given-names>Kseniya Alekseevna</given-names></name></name-alternatives><email xlink:type="simple">romashinaka@my.msu.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Вычислительный центр им. А.А. Дородницына ФИЦ Информатика и управление РАН</institution></aff><aff xml:lang="en"><institution>Dorodnicyn Computing Center FRC CSC of RAS</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт океанологии им. П.П. Ширшова РАН</institution></aff><aff xml:lang="en"><institution>Shirshov Institute of Oceanology of RAS</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>МГУ им. М.В. Ломоносова</institution></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>11</day><month>02</month><year>2025</year></pub-date><volume>27</volume><issue>6</issue><elocation-id>1090–1108</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Тучкова Н.П., Беляев К.П., Михайлов Г.М., Ромашина К.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Тучкова Н.П., Беляев К.П., Михайлов Г.М., Ромашина К.А.</copyright-holder><copyright-holder xml:lang="en">Tuchkova N.P., Belyaev K.P., Mikhaylov G.M., Romashina K.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://ellibs.elpub.ru/jour/article/view/539">https://ellibs.elpub.ru/jour/article/view/539</self-uri><abstract><p>Для анализа потоков тепла использованы данные наблюдений за 1979–2018 гг. в районе Северной Атлантики. Пространственно-временная изменчивость полного потока тепла моделировалась стохастическим диффузионным процессом. Коэффициенты стохастического дифференциального уравнения были оценены методами непараметрической статистики. Ранее существование и единственность решения в сильном смысле стохастического дифференциального уравнения, порожденного построенным диффузионным процессом, были доказаны при выполнении условий Колмогорова. В настоящей работе коэффициенты уравнения аппроксимировались по времени тригонометрическими полиномами, амплитуды и фазы которых зависели от значений потока. По заданному ряду длиной 40 лет с 1979 по 2018 г. были построены пространственные карты и временные кривые. Результаты показаны для 1999 и 2018 годов., а также произведен их сравнительный анализ. Численные расчеты были проведены на суперкомпьютере «Ломоносов-2» МГУ имени М.В. Ломоносова.
</p></abstract><trans-abstract xml:lang="en"><p>To analyze heat fluxes, observational data for 1979-2018 were used for the North Atlantic. The spatiotemporal variability of the total heat flux was modeled by a stochastic diffusion process. The coefficients of the stochastic differential equation were estimated by using nonparametric statistics. Previously, the existence and uniqueness of a solution in the strong sense of the stochastic differential equation generated by the constructed diffusion process was proven when Kolmogorov's conditions were met. In this work, the coefficients of the equation were approximated in time by trigonometric polynomials, the amplitudes and phases of which depended on the flow values. Using a given series of 40 years in length from 1979 to 2018, spatial maps and time curves were constructed. The results are shown for 1999 and 2018, and their comparative analysis is also carried out. Numerical calculations were realized on the Lomonosov-2 supercomputer of the Lomonosov Moscow State University.
</p></trans-abstract><kwd-group xml:lang="ru"><kwd>анализ временных рядов</kwd><kwd>климатический сезонный ход</kwd><kwd>максимальные и минимальные значения тепловых потоков и температуры внутри климатического года</kwd><kwd>аппроксимация коэффициентов стохастического дифференциального уравнения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>time series analysis</kwd><kwd>climatic seasonal cycle</kwd><kwd>maximum and minimum heat fluxes and temperature values within a climatic year</kwd><kwd>approximation of the coefficients of a stochastic differential equation</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">Gavrikov A., Gulev S., Markina M., Tilinina N., Verezemskaya P., Barnier B., Dufour A., Zolina O., Zyulyaeva Y., Krinitskiy M., Okhlopkov I., Sokov A. 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