But those that do form have a greater chance of becoming intense storms
Global warming is making the atmosphere more hostile to the formation of tropical cyclones. By the early 2010s there were about 13 percent fewer storms across all oceans than there were in the late 19th century, according to a new study published on Monday in Nature Climate Change.
Scientists have been trying for decades to answer the question of how climate change will affect tropical cyclones, given the large-scale death and destruction these storms can cause. Climate models have suggested the number of storms should decline as global temperatures rise, but that had not been confirmed in the historical record. Detailed tropical cyclone data from satellites only go back until about the 1970s, which is not long enough to pick out trends driven by global warming.
They found the 13 percent global decrease in tropical cyclones over the period of 1900 to 2012, compared with 1850 to 1900 . There was an even larger decline of about 23 percent since around 1950, around the time global temperatures started to noticeably rise. The declines vary in different parts of the ocean. For example, the western North Pacific saw 9 percent fewer storms, and the eastern North Pacific saw 18 percent fewer over the 20th and early 21st centuries.
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