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.

中文翻译：

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热带气旋及其向温带气旋的转变：半个世纪趋势的估计

介绍了根据 1970 年至 2019 年期间的观测结果对热带气旋频率、热带气旋转变为温带气旋的概率及其在北半球和南半球不同海洋盆地中的趋势进行分析的结果。已经注意到热带气旋转变为整个地球的温带气旋频率增加的显着趋势。表现出北半球和南半球不同洋盆的具体特征。特别是，在太平洋西北部海域，气旋袭击了欧亚大陆沿海温带地区，包括远东地区，转变事件的频率显着增加。在这种大趋势的背景下，