, Volume 36, Issue 6, pp 718-730
Date: 13 Nov 2009

Climatic trends in the middle and high latitudes of the Northern Hemisphere

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Air temperature variations are studied in the territory of the middle and high latitudes of the Northern Hemisphere. Estimates of the intraregional homogeneity of current climate changes were used to carry out zoning by several criteria for the XX and early XXI centuries. Six zones with typical climate change were identified: the Pacific, Canadian, Atlantic, European, Siberian, and Far Eastern. A new approach is proposed to the description of possible regional and global climate changes in the Northern Hemisphere basing on a combination of “greenhouse” and “rotational” effects. It is shown that the data on variations in the angular velocity of the Earth’s rotation can be used as a universal indicator of climate changes on the planet. The proposed approach made it possible to account for not only the growth in temperature caused by greenhouse gas emission, but also climate changes (in particular, the cooling of the 1940s–1970s). A concept is developed, allowing a new scenario of possible climate changes in the XXI century to be proposed.