Long-term changes in atmospheric circulation types by B. L. Dzerdzeevskii and global climate system

   Long-term changes in atmospheric circulation patterns by B. L. Dzerdzeevskii in the extratropical zone of the Northern Hemisphere and their relationship to global climate were examined. The nature of changes in each of the four circulation groups according to B. L. Dzerdzeevskii for the period from 1899 to 2019 was analyzed. It has been shown that long-term manifestations of changes in the duration of atmospheric circulation groups in the thermal regime are unstable. Based on statistical analysis, the relationships between the durations of aggregated circulation groups and global temperature and surface pressure anomalies in the sectors and latitudinal zones of the Northern Hemisphere during periods of dominance of different circulation groups have been evaluated. The article also examines the possible interaction between different types of circulation and the pause in temperature changes in the Northern Hemisphere during 1998–2013. Changes in the aerosol-gas composition of the atmosphere as a dominant factor in global climate change are considered. The energy imbalance in the climate system in the current century may also be related to changes in the processes of large-scale ocean-atmosphere interactions.

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