Abstract
Results from an analysis of the frequency of tropical cyclones, the probability of their transformation into extratropical cyclones, and their trends in different oceanic basins of the Northern and Southern Hemispheres on the basis of observations over the period from 1970 to 2019 are presented. Significant trends in the increase in the transformation frequency of tropical cyclones into extratropical for the Earth as a whole have been noted. The specific features of different oceanic basins of the Northern and Southern Hemispheres are manifested. In particular, a significant increase in the frequency of the transformation events was observed for the northwestern water area of the Pacific Ocean, where the cyclones hit in the coastal extratropical regions of Eurasia, including the Far East. Against the background of this general trend, significant variations are manifested for different phases of the El Niño phenomenon.
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Funding
The study of the transition of tropical to extratropical cyclones was supported by the Russian Foundation for Basic Research, project no. 17-29-05098. The study of tropical cyclones in connection to El Niño events was supported by the Russian Science Foundation, project no. 19-17-00240.
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Translated by V. Krutikova
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Mokhov, I.I., Makarova, M.E. & Poroshenko, A.G. Tropical Cyclones and Their Transformation into Extratropical: Estimates of the Half-Century Trends. Dokl. Earth Sc. 493, 552–557 (2020). https://doi.org/10.1134/S1028334X20070107
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DOI: https://doi.org/10.1134/S1028334X20070107