Noticeable increase in tropical cyclone precipitation over East Asia
September 3, 2024
Press release for the paper entitled "Increasing WNP tropical cyclone-related extreme precipitation over East Asia during boreal summer associated with PDO shift" by Jiwei Wu, Prof. Ryuichi Kawamura, and colleagues. (DOI: 10.1016/j.wace.2024.100714)
This research investigates the increasing trend of extreme precipitation related to tropical cyclones (TCs) in the western North Pacific (WNP) and its impact on East Asia during boreal summer. The study analyzes TC-related core precipitation (TCP) and remote precipitation (TRP) from 1979 to 2021, with a focus on the shifts driven by the Pacific Decadal Oscillation (PDO). The findings reveal that the transition of the PDO to its negative phase since 1997 has intensified extreme rainfall events over East Asia. The research also highlights the influence of rising sea surface temperatures (SSTs) in the WNP, which have strengthened the western Pacific subtropical high (WPSH), leading to continental migration of TCs and contributing to the increase in TC-related extreme precipitation. This study emphasizes the importance of understanding large-scale climate patterns and their role in shaping East Asia regional extreme weather phenomena.
I think this phenomenon is very noteworthy, because in most future climate scenarios, the SST in the WNP is rising. Therefore, it is necessary to pay attention to the connection between WNP SST and TC activity, especially for the precipitation part.
