Changes in the Atmospheric Circulation Regime in the Context of Global Climate Trends in the Atlantic-Eurasian Sector of the Northern Hemisphere

IF 0.3 Q4 GEOGRAPHY Geography and Natural Resources Pub Date : 2023-12-21 DOI:10.1134/s1875372823030083

S. V. Morozova, K. E. Denisov, E. A. Polyanskaya, K. S. Kondakov, N. V. Korotkova, R. R. Gafurov

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Abstract

This study examines changes in an AT-500 hPa surface pressure field across two natural periods of the earth’s climate system: a period of stabilization and the second wave of global warming, divided into an active phase and a decelerated warming phase. The study area is the Atlantic-Eurasian sector of the hemisphere, where weather and climate instability is the highest. An analysis of climatic fields is performed for January and July. It is established that in both January and July the highest degree of zonality is typical for the active phase of the second wave of global warming. It is found that in January the climatic baric wave shifted along the west–east direction between natural climatic periods. A westward shift is observed during the stabilization period and the decelerated warming phase. Eastward wave movement is observed in the active phase of the second wave of global warming. In July, in the context of the west–east shift of the baric wave over most of European Russia, during the decelerated warming phase there emerged an anticyclonic core, which indicates an increase in the frequency of anticyclones over this territory. It is suggested that this restructuring of the pressure field contributes to an increase in the role of summer transformation processes in the ongoing climate warming.

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北半球大西洋-欧亚板块全球气候趋势背景下的大气环流制度变化

摘要本研究考察了 AT-500 hPa 表面气压场在地球气候系统两个自然时期的变化：稳定期和第二波全球变暖期，分为活跃期和减速变暖期。研究区域是天气和气候最不稳定的半球大西洋-欧亚大陆区域。对 1 月和 7 月的气候场进行了分析。结果表明，1 月和 7 月的地带性程度最高，是全球变暖第二波活跃阶段的典型特征。研究发现，1 月份的气候巴里克波在自然气候期之间沿西东方向移动。在气候稳定期和气候变暖减速期，气候气压波向西移动。在第二波全球变暖的活跃阶段，观察到气流向东移动。7 月份，在俄罗斯欧洲大部分地区巴里克波向西向东移动的背景下，在气候变暖减速阶段出现了一个反气旋核心，这表明该地区反气旋频率增加。据认为，气压场的这种重组有助于增强夏季转换过程在当前气候变暖中的作用。

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Geography and Natural Resources GEOGRAPHY-

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0.50

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期刊介绍： Geography and Natural Resources publishes information on research results in the field of geographical studies of nature, the economy, and the population. It provides ample coverage of the geographical aspects related to solving major economic problems, with special emphasis on regional nature management and environmental protection, geographical forecasting, integral regional research developments, modelling of natural processes, and on the advancement of mapping techniques. The journal publishes contributions on monitoring studies, geographical research abroad, as well as discussions on the theory of science.