The Global Atmosphere Oscillations in the Context of the Recent Climate Change

This study is dedicated to the confirmation, improvement, and extending of the preliminary hypothesis on short-term oscillations of the recent climate thermodynamic characteristics. In some previous studies we distinguished the quasi-cyclic oscillations in the recent climate dynamics with periods of 3–4 years and 25–35 years. These fluctuations appear in the most explicit form in the terms of large-scale redistribution of the atmospheric air mass accompanied by a significant enhancement of the positive atmospheric pressure anomaly in the equatorial-tropical zone and formation of the other major anomalies in different regions of the Earth. The results indicate that the known multimode regional indices in the dynamics of the climate system: the North Atlantic, North Pacific, Southern, and the others so-called Oscillations (NAO, NPO etc.) can be derived from the global atmospheric oscillations (GAO) with the temporal scales from several years to decades. It was found that multi-decade GAO is distinguished on the basis of a consequent phase change of the climate scenario in the North Atlantic region. Consideration of the interannual GAO led us to the definition of a new concept of the El Niño’s physical trigger mechanism in the Pacific region. Moreover, on the basis of the empirical data, it was shown for the first time that the well-known climatic events within the El Niño—Southern Oscillation (ENSO) phenomenon should be considered as a structural part of the interannual GAO.