North-East of Asia as the temperature hyperzone and its alteration over the past 60 years
https://doi.org/10.31242/2618-9712-2022-27-1-57-69
Abstract
We have compared and estimated warm season conditions over the Okhotsk sea coast and upper parts of the Kolyma, Indigirka and Yana rivers basins in 2000–2015 and 1931–1960. The similarity of the heat supply indices of the regions made it possible to unify them into a temperature hyperzone. The heat supply of the hyperzone in the middle of the 20th century corresponded to the conditions of the forest-tundra and northern taiga, but nowadays it is similar to the northern and middle taiga conditions, moreover at the peak of the summer it corresponds to the southern taiga and deciduous forests. However, the landscapes are unlikely to change drastically, taking into account the high ecological plasticity of the vegetation cover dominants. Due to the warming in the continental and coastal regions of the hyperzone, similarity of some indicators (mean temperatures of May and July, sums of temperatures above 0 and 5 °С, the number of days with temperatures above 0 °C and transition dates over 0 °С in spring) has decreased, but of others (annual maximums, days with temperatures above 10 °C and their sums, the number of the frost-free days) has increased. The warming does not dismantle the notion of hyperzone but rectifies it only.
Keywords
Supporting agencies: The research was supported by the Russian Fund for Basic Research (project № 19–04-00312а).
About the Authors
A. V. Alfimov
Institute of Biological Problems of the North FEB RAS
Russian Federation
Russian Federation
ALFIMOV, Arcady Vasilievich, Cand. Sci. (Geography), leading researcher
Far-Eastern Branch of the Russian Academy of Sciences, 18 Portovaya st., Magadan 685000
D. I. Berman
Institute of Biological Problems of the North FEB RAS
Russian Federation
Russian Federation
BERMAN, Daniil Iosifovich, professor, Dr. Sci (Biology), chief researcher
Far-Eastern Branch of the Russian Academy of Sciences, 18 Portovaya st., Magadan 685000
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Review
For citations:
Alfimov A.V., Berman D.I. North-East of Asia as the temperature hyperzone and its alteration over the past 60 years. Arctic and Subarctic Natural Resources. 2022;27(1):56-69. (In Russ.) https://doi.org/10.31242/2618-9712-2022-27-1-57-69
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