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

IF 1.6 4区 地球科学 Q4 ENVIRONMENTAL SCIENCES
I. A. Ilyushchenkova, A. Korzhikov, B. Ivanov
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Abstract

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 long-term forecasts for the northern polar region and detailing them for the Spitzbergen (Svalbard) region.
寒冷时期斯匹茨卑尔根(斯瓦尔巴群岛)地区极端地表气温的一些形成模式
本文介绍了斯匹茨卑尔根群岛巴伦支堡地区10 ~ 5月寒期极端地面气温(SAT)形成过程中气象条件的研究成果。研究了1912年至2022年期间的6个极冷期和6个极暖期。计算了巴伦支堡极端SAT与斯匹茨卑尔根(斯瓦尔巴群岛)西部Longyearbyen、Hornsund、Isfjord Radio、Pyramiden、Nu-Alesund等点极端SAT的相关系数。分析了地面、500 hPa和700 hPa位势面和气温异常的大气环流特征,并给出了极端SAT形成过程中NAO和AO大气环流指数的对比结果。极涡的局域化特征出现在SAT负异常和正异常形成期间。在极低温冷期,极涡的局域化表现在喀拉海和地岛东北部。在海面上,大西洋低气压槽转移到斯堪的纳维亚海岸和巴伦支海南部。斯瓦尔巴群岛地区受到北极海盆、格陵兰岛上空反气旋场外围的影响,在北冰洋西部海域上空,形成了SAT偏差低于正常3-4度的条件。在SAT极高的情况下,极涡转移到加拿大北极群岛东部和巴芬海。在地表,来自冰岛低气压的低压槽在格陵兰、挪威和巴伦支海上空形成,导致暖气团从大西洋向极地纬度移动,并在斯匹茨卑尔根(斯瓦尔巴群岛)地区形成高于长期值1-2度的平均SAT。所获得的宏观过程的估计可用于编制北极地区的长期预报,并详细说明斯匹茨卑尔根(斯瓦尔巴群岛)地区的预报。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.00
自引率
5.00%
发文量
37
审稿时长
7 months
期刊介绍: The mission of Arctic, Antarctic, and Alpine Research (AAAR) is to advance understanding of cold region environments by publishing original scientific research from past, present and future high-latitude and mountain regions. Rapid environmental change occurring in cold regions today highlights the global importance of this research. AAAR publishes peer-reviewed interdisciplinary papers including original research papers, short communications and review articles. Many of these papers synthesize a variety of disciplines including ecology, climatology, geomorphology, glaciology, hydrology, paleoceanography, biogeochemistry, and social science. Papers may be uni- or multidisciplinary but should have interdisciplinary appeal. Special thematic issues and proceedings are encouraged. The journal receives contributions from a diverse group of international authors from academia, government agencies, and land managers. In addition the journal publishes opinion pieces, book reviews and in memoria. AAAR is associated with the Institute of Arctic and Alpine Research (INSTAAR) the oldest active research institute at the University of Colorado Boulder.
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