Seasonal advance of intense tropical cyclones in a warming climate

Kaiyue Shan, Yanluan Lin, Pao-Shin Chu, Xiping Yu () and Fengfei Song ()
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Kaiyue Shan: Tsinghua University
Yanluan Lin: Tsinghua University
Pao-Shin Chu: University of Hawai’i at Mānoa
Xiping Yu: Southern University of Science and Technology
Fengfei Song: Ocean University of China

Nature, 2023, vol. 623, issue 7985, 83-89

Abstract: Abstract Intense tropical cyclones (TCs), which often peak in autumn1,2, have destructive impacts on life and property3–5, making it crucial to determine whether any changes in intense TCs are likely to occur. Here, we identify a significant seasonal advance of intense TCs since the 1980s in most tropical oceans, with earlier-shifting rates of 3.7 and 3.2 days per decade for the Northern and Southern Hemispheres, respectively. This seasonal advance of intense TCs is closely related to the seasonal advance of rapid intensification events, favoured by the observed earlier onset of favourable oceanic conditions. Using simulations from multiple global climate models, large ensembles and individual forcing experiments, the earlier onset of favourable oceanic conditions is detectable and primarily driven by greenhouse gas forcing. The seasonal advance of intense TCs will increase the likelihood of intersecting with other extreme rainfall events, which usually peak in summer6,7, thereby leading to disproportionate impacts.

Date: 2023
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DOI: 10.1038/s41586-023-06544-0

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