第一届未来大气科学论坛

Tropical cyclones in the western North Pacific (WNP) have considerable impacts on coastal regions in East Asia, particularly in China. This study finds a significant delay in the typhoon season in China, with threshold dates of the last five percentiles of accumulated cyclone energy shifting later at a rate of five to nine days per decade over the satellite era 1979−2022. The seasonal delay is related to a significant delay in the genesis of late-season typhoons affecting China, primarily attributed to elevated mid-level relative humidity and sea surface temperature in the main development region over the WNP. These typhoons increasingly move toward East China because of enhanced easterly steering flow anomalies over the subtropical WNP. Our findings urge a need to extend disaster prevention measures for mitigating typhoon impacts effectively.

tropical cyclone,China,seasonal delay,accumulated cyclone energy,steering flow