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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">aari</journal-id><journal-title-group><journal-title xml:lang="ru">Проблемы Арктики и Антарктики</journal-title><trans-title-group xml:lang="en"><trans-title>Arctic and Antarctic Research</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0555-2648</issn><issn pub-type="epub">2618-6713</issn><publisher><publisher-name>Государственный научный центр Российской Федерации Арктический и антарктический научно-исследовательский институт</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30758/0555-2648-2025-71-2-108-122</article-id><article-id custom-type="elpub" pub-id-type="custom">aari-711</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>МЕТЕОРОЛОГИЯ И КЛИМАТОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METEOROLOGY AND CLIMATOLOGY</subject></subj-group></article-categories><title-group><article-title>Оценка успешности ансамблевого долгосрочного метеорологического прогноза в Западной Арктике</article-title><trans-title-group xml:lang="en"><trans-title>Assessing the success of ensemble long-term meteorological forecasting in the Western Arctic</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-9643-3063</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ильющенкова</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ilyushchenkova</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>St. Petersburg</p></bio><email xlink:type="simple">ilyushenkova@aari.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7386-7233</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цепелев</surname><given-names>В. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsepelev</surname><given-names>V. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Санкт-Петербург</p><p>Москва</p></bio><bio xml:lang="en"><p>St. Petersburg</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ГНЦ РФ Арктический и антарктический научно-исследовательский институт</institution><country>Россия</country></aff><aff xml:lang="en"><institution>State Scientific Center of the Russian Federation Arctic and Antarctic Research Institute</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ГНЦ РФ Арктический и антарктический научно-исследовательский институт; Московский физико-технический институт (национальный исследовательский университет)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>State Scientific Center of the Russian Federation Arctic and Antarctic Research Institute; Moscow Institute of Physics and Technology (National Research University)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>06</day><month>07</month><year>2025</year></pub-date><volume>71</volume><issue>2</issue><fpage>108</fpage><lpage>122</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ильющенкова И.А., Цепелев В.Ю., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Ильющенкова И.А., Цепелев В.Ю.</copyright-holder><copyright-holder xml:lang="en">Ilyushchenkova I.A., Tsepelev V.Y.</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://www.aaresearch.science/jour/article/view/711">https://www.aaresearch.science/jour/article/view/711</self-uri><abstract><p>В статье приведен анализ применения ансамблевого подхода для составления долгосрочного метеорологического прогноза по Западной Арктике с заблаговременностью в один месяц. Прогноз среднемесячных полей давления на уровне моря и приземной температуры воздуха проводился по моде ли CFSv2. Представлены оценки успешности ретроспективных прогнозов за 2010–2018 гг. при помощи двух методов ансамблевого прогноза — метод среднего по всем членам ансамбля и метод прогноза по лучшему классу, выделенному из всего ансамблевого набора процедурой кластеризации. Рассмотрены четыре оценки успешности прогнозов: среднеквадратическая ошибка, коэффициент корреляции, коэффициент геометрического подобия между фактическим и прогностическим полями и среднеквадратическая мера мастерства. Для 2018 и 2024 гг. была дополнительно проанализирована успешность долгосрочного метеорологического прогноза по макроциркуляционному методу Вангенгейма–Гирса. Наиболее высокое качество прогнозов по методу лучшего класса отмечено в летний период, а среднеквадратическая ошибка прогнозов в это время минимальна. Прогноз по методу всех членов ансамбля предпочтительно использовать в зимний сезон.</p></abstract><trans-abstract xml:lang="en"><p>The article presents quality assessments of using the ensemble approach to produce long-term meteorological forecast in the Western Arctic with a one-month advance. The assessment of retrospective forecasts’ quality of the sea level pressure anomalies field and surface air temperature anomalies has been performed for 2010–2018. The ensemble forecast for the second month was made using two methods. The f irst method is the forecast of the mean field of meteorological parameters for all ensemble members. The second method is the forecast of the mean field made by the best class selected from all ensemble members by the clustering procedure. The best class was selected by comparing macrosynoptic process evolution of the first forecast month of each selected class with the actual observations. In the area considered, which is bounded by coordinates from 20º W to 100º E and from 60º N to 80º N, 108 retrospective forecasts were made. As an independent series, the forecast success for 2018 and 2024 was analyzed using two ensemble forecasting techniques and a synoptic-statistical method (the Wangenheim–Geers macro-circulation method). Three estimates of the forecast quality were obtained — the mean square error, the correlation coefficient between the forecast and actual fields of meteorological parameters, and the coefficient of geometric similarity of the forecast and actual fields of the meteorological parameter. The estimation of quality was made for two parameters — sea level pressure and surface air temperature. The highest quality of forecasts using the best class method is observed in the summer season, and the RMS error of forecasts is minimal at this time. The forecast by the method of all ensemble members is preferable in the winter season. The results show that, in general, the best-class ensemble forecasts are more accurate for forecasting the phase of pressure anomalies, while for forecasting the magnitude of temperature and pressure anomalies, it is preferable to use the forecasts for all ensemble members. For 2018 and 2024, both ensemble forecast methods showed higher forecast quality scores than the synoptic-statistical method.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>атмосферная циркуляция</kwd><kwd>ансамблевый прогноз</kwd><kwd>долгосрочный прогноз погоды</kwd><kwd>Западная Арктика</kwd><kwd>оценка качества прогноза</kwd><kwd>приземная температура воздуха</kwd><kwd>давление на уровне моря</kwd><kwd>модель CFSv2</kwd></kwd-group><kwd-group xml:lang="en"><kwd>assessment of forecast quality</kwd><kwd>air temperature</kwd><kwd>atmospheric circulation</kwd><kwd>ensemble forecast</kwd><kwd>long-term weather forecast</kwd><kwd>surface air temperature</kwd><kwd>Western Arctic</kwd><kwd>sea level pressure</kwd><kwd>model CFSv2</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в рамках НИТР 5.1 Росгидромета на 2025–2029 гг. «Раз витие моделей, методов и технологий мониторинга и прогнозирования состояния атмосферы, океана,  морского ледяного покрова, ледников и вечной мерзлоты, процессов взаимодействия льда с природными объектами и инженерными сооружениями для Арктики».</funding-statement><funding-statement xml:lang="en">The research was carried out within the framework of the scientific research and technology works 5.1  of Roshydromet for 2025–2029 “Development of models, methods and technologies for monitoring and  forecasting the state of the atmosphere, ocean, sea ice cover, glaciers and permafrost (cryosphere), processes of  ice interaction with natural objects and engineering structures for the Arctic”.</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">Вангенгейм Г.Я. 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