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.

中文翻译：

---

全球气候趋势背景下北半球大西洋-欧亚段大气环流格局的变化

摘要

这项研究研究了地球气候系统两个自然时期的 AT-500 hPa 表面压力场​​的变化：稳定时期和第二波全球变暖，分为活跃阶段和减速变暖阶段。研究区域是半球的大西洋-欧亚部分，这里的天气和气候不稳定程度最高。对一月和七月的气候场进行分析。据证实，一月和七月的最高地带性程度是第二波全球变暖活跃阶段的典型特征。研究发现，1月气候气压波在自然气候周期之间沿东西方向移动。在稳定期和减速变暖期观察到西移。在第二波全球变暖的活跃阶段观察到向东的波浪运动。7月，在俄罗斯欧洲大部分地区气压波自西向东移动的背景下，在减速变暖阶段出现了一个反气旋核心，这表明该地区反气旋频率有所增加。有人认为，压力场的这种重组有助于增强夏季转变过程在持续气候变暖中的作用。