Some patterns of formation of extreme surface air temperature in the area of the Spitzbergen (Svalbard) archipelago during the cold period

• Main Authors: I. A. Ilyushchenkova, A. Ya. Korzhikov, B. V. Ivanov, И. А. Ильющенкова, А. Я. Коржиков, Б. В. Иванов
• Other Authors: This study was made within the framework of Project 5.1.4, «Monitoring of State and Pollution of the Environment, Including the Cryosphere, in the Arctic Basin and in the Area of Scientific Station Ice Base Cape Baranov, Hydrometeorological Observatory of Tiksi and Russian Scientific Centre on Spitsbergen», within the Plan NITR of Roshydromet 2020–2024., Исследование выполнено в рамках проекта 5.1.4 Плана НИТР Росгидромета, 2020–2024 гг. «Мониторинг состояния и загрязнения природной среды, включая криосферу, в Арктическом бассейне и районах научно-исследовательского стационара «Ледовая база Мыс Баранова», Гидрометеорологической обсерватории Тикси и Российского научного центра на архипелаге Шпицберген».
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Государственный научный центр Российской Федерации Арктический и антарктический научно-исследовательский институт 2023
• Subjects: Шпицберген; atmospheric circulation; polar vortex; Svalbard; synoptic processes; Western Arctic; Западная Арктика; синоптические процессы; температура воздуха; циркумполярный вихрь; Arctic; Barents Sea; Barentsburg; Canadian Arctic Archipelago; Greenland; Hornsund; Isfjord; Kara Sea; Longyearbyen; Pyramiden; Severnaya Zemlya; Svalbard Archipelago; Arctic Archipelago; Arctic Basin; Baffin; Isfjord*; Spitzbergen; Арктика
• Online Access: https://www.aaresearch.science/jour/article/view/527; https://doi.org/10.30758/0555-2648-2023-69-2-141-156

The article presents research findings of meteorological conditions during the formation of extreme surface air temperature (SAT) in the cold period from October to May in the Barentsburg area, the Spitzbergen (Svalbard) archipelago. Six extremely cold periods and six extremely warm periods for the weather sequence from 1912 to 2022 are considered. Correlation coefficients of extreme SAT in Barentsburg with extreme SAT in the points of Longyearbyen, Hornsund, Isfjord Radio, Pyramiden, Nu-Alesund, located in the west of Spitzbergen (Svalbard), were calculated. Also, characteristics of atmospheric circulation at the surface level, the level of the geopotential surface 500 hPa and 700 hPa and air temperature anomalies are analyzed, the results of comparing atmospheric circulation indices NAO and AO in the formation of extreme SAT are presented. Characteristic localizations of the polar vortex were found during the formation of negative and positive anomalies of SAT. For cold periods with extremely low temperatures, the localization of the polar vortex in the northeast of the Kara Sea and Severnaya Zemlya archipelago is observed. At the surface level the baric trough from the Atlantic depression is shifted to the coast of Scandinavia and the southern part of the Barents Sea. The Svalbard region is under the influence of the periphery of the anticyclonic field over the Arctic basin, Greenland, over the western Arctic Seas, conditions are formed for the deviation of SAT by 3–4 degrees below normal. In the case of extremely high SAT, the polar vortex is shifted to the eastern part of the Canadian Arctic Archipelago and the Baffin Sea. At the surface level, the baric trough from the Icelandic depression develops over the Greenland, Norwegian and Barents Seas, which leads to the moving of warm air masses from the Atlantic to polar latitudes and the formation of average SAT in the Spitzbergen (Svalbard) region above long-term values by 1–2 degrees. The estimates of macroprocesses obtained can be used for preparing ...