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Arctic Oscillation impact on thermal regime in the Eastern part of the Baltic region

机译：北极涛动对波罗的海东部地区的热状况的影响

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The paper presents statistical estimations of Arctic Oscillation (AO) impact on air temperature regime in the eastern part of the Baltic region. The region is characterized by high inter-annual and inter-seasonal variability. It is important to note that in the region of global warming extremely low winter temperatures can be observed on the European territory of Russia. AO is one of the large-scale global patterns of atmospheric circulation closely associated with weather variability in northern Europe. AО anomalies occur in the upper atmosphere (stratosphere) and only then are transferred to tropospheric lower layers. The anomalies can persist over a long period of time (up to two months); so they can serve as precursors in long-range weather forecasts. In turn, changes in stratospheric polar vortex and sudden stratospheric warmings can be related to geomagnetic activity. Perhaps geomagnetic activity influences the meridional temperature gradient and then changes the structure of the stratospheric zonal wind. These changes have an effect on the tropospheric circulation. The stratosphere–troposphere coupling takes place during winter months. Therefore, the paper deals with extremely cold winter anomalies in the eastern part of the Baltic Sea region. At the same time, we examine atmospheric circulation peculiarities associated with AO phase change. We analyze data for 1951–2014.
机译：本文介绍了北极涛动（AO）对波罗的海地区东部气温状况的统计估计。该地区的特点是年际和季节间的高度变异性。重要的是要注意，在全球变暖地区，俄罗斯的欧洲领土上观察到极低的冬季温度。 AO是与北欧气候变化密切相关的大规模全球大气环流模式之一。 AО异常发生在高层大气（平流层）中，然后才转移到对流层下部。异常可能会持续很长时间（最多两个月）;因此它们可以作为远程天气预报的先驱。反过来，平流层极地涡旋的变化和平流层突然变暖可能与地磁活动有关。地磁活动也许会影响子午温度梯度，然后改变平流层纬向风的结构。这些变化对对流层循环有影响。平流层-对流层耦合发生在冬季。因此，本文处理了波罗的海地区东部的极端寒冷的冬季异常。同时，我们研究了与AO相变有关的大气环流特征。我们分析了1951–2014年的数据。

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