aariПроблемы Арктики и АнтарктикиArctic and Antarctic Research0555-26482618-6713Государственный научный центр Российской Федерации Арктический и антарктический научно-исследовательский институт10.30758/0555-2648-2024-70-2-161-173aari-609Research ArticleМЕТЕОРОЛОГИЯ И КЛИМАТОЛОГИЯMETEOROLOGY AND CLIMATOLOGYНекоторые механизмы формирования аномальной температуры воздуха в летние сезоны на арх. ШпицбергенSome mechanisms of abnormal surface air temperature formation in the area of the Spitsbergen archipelago in summerhttps://orcid.org/0009-0006-9643-3063ИльющенковаИ. А.IlyushchenkovaI. A.

Санкт-Петербург

Irina A. Ilyushchenkova

St. Petersburg

ilyushenkova@aari.ruhttps://orcid.org/0009-0004-2610-450XКоржиковА. Я.KorzhikovA. Ya.

Санкт-Петербург

Alexander Ya. Korzhikov

St. Petersburg

https://orcid.org/0000-0002-6801-5458ИвановБ. В.IvanovB. V.

Санкт-Петербург

Boris V. Ivanov

St. Petersburg

ГНЦ РФ Арктический и антарктический научно-исследовательский институтРоссияState Scientific Center of the Russian Federation Arctic and Antarctic Research InstituteRussian FederationГНЦ РФ Арктический и антарктический научно-исследовательский институт; Санкт-Петербургский государственный университетРоссияState Scientific Center of the Russian Federation Arctic and Antarctic Research Institute; Saint-Petersburg State UniversityRussian Federation202427062024702161173Copyright © Ильющенкова И.А., Коржиков А.Я., Иванов Б.В., 20242024Ильющенкова И.А., Коржиков А.Я., Иванов Б.В.Ilyushchenkova I.A., Korzhikov A.Y., Ivanov B.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.aaresearch.science/jour/article/view/609

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Исследованы особенности формирования летних аномальных значений приземной температуры воздуха в районе арх. Шпицберген. В работе использован временной ряд среднемесячных величин приземной температуры воздуха в п. Баренцбург с 1912 по 2023 г. Выявлены значимые различия в характере атмосферной циркуляции, соответствующей аномально теплым и холодным летним сезонам, и рассчитаны корреляционные связи с индексами атмосферной циркуляции. Наибольшая статистически значимая связь аномалий приземной температуры воздуха наблюдается с индексом Арктический диполь, теснота связи в сентябре составила –0,49. Проведен спектральный анализ временных рядов индексов атмосферной циркуляции и определены основные периоды колебаний от 2–3 лет до 25 лет.

The temperature in the Arctic is increasing faster than the global average. A question that challenges scientific community is whether the intensity and frequency of dangerous meteorological phenomena in the Arctic are increasing as rapidly. The article presents the results of examining abnormal summer seasons in the area of the Spitsbergen archipelago. The study used data on surface air temperature in Barentsburg obtained from 1912 to 2023. The regional average results showed a statistically significant linear summer trend. The mean summer temperature in Barentsburg is increasing at a rate of 0.2 °C/10 years. Positive and negative extremes of seasonal mean temperature in the summer from June to September were determined as higher than or equal to 1,5 standard deviation. The atmospheric circulation at the sea level pressure and at the height of the geopotential surface of 500 hPa is analyzed, and the localization of surface temperatures anomalies for highlighted abnormal temperature in summer season events is discussed. The results of the analysis of atmospheric circulation revealed significant differences between abnormal warm and cold summer seasons. During abnormally cold summers the circumpolar vortex is located in the polar region and causes the advection of cold air masses from the north of Greenland. In the case of abnormally warm summers the cyclonic vortex is shifted to the Canadian Arctic archipelago and the Baffin Sea, while warm air masses from the Atlantic Ocean enter the area of the Spitsbergen archipelago. The assessment of the statistical significance of the correlation between the time series of surface air temperature anomalies and the atmospheric circulation indices Arctic Oscillation, Arctic dipole, Pacific North American oscillation showed significant results in September with the Arctic Oscillation index, in August and September with the Arctic dipole index, in July with the Pacific North American oscillation index. The greatest statistically significant association of surface air temperature anomalies was found with the Arctic dipole index, the closeness of the connection in September was –0.49. Spectral analysis was carried out and the main periods of atmospheric indices fluctuations from 2–3 years to 25 years were determined.

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The authors declare that there are no conflicts of interest present.