Ocean internal tides suppress tropical cyclones in the South China Sea

Shoude Guan, Fei-Fei Jin (), Jiwei Tian (), Lin I-I (), Iam-Fei Pun, Wei Zhao, John Huthnance, Zhao Xu, Wenju Cai, Zhao Jing, Lei Zhou, Ping Liu, Yihan Zhang, Zhiwei Zhang, Chun Zhou, Qingxuan Yang, Xiaodong Huang, Yijun Hou and Jinbao Song
Additional contact information
Shoude Guan: Ocean University of China
Fei-Fei Jin: University of Hawaii at Manoa
Jiwei Tian: Ocean University of China
Lin I-I: National Taiwan University
Iam-Fei Pun: National Central University
Wei Zhao: Ocean University of China
John Huthnance: National Oceanography Centre
Zhao Xu: Ocean University of China
Wenju Cai: Ocean University of China
Zhao Jing: Ocean University of China
Lei Zhou: Shanghai Jiao Tong University
Ping Liu: Ocean University of China
Yihan Zhang: Ocean University of China
Zhiwei Zhang: Ocean University of China
Chun Zhou: Ocean University of China
Qingxuan Yang: Ocean University of China
Xiaodong Huang: Ocean University of China
Yijun Hou: Chinese Academy of Sciences
Jinbao Song: Zhejiang University

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Tropical Cyclones (TCs) are devastating natural disasters. Analyzing four decades of global TC data, here we find that among all global TC-active basins, the South China Sea (SCS) stands out as particularly difficult ocean for TCs to intensify, despite favorable atmosphere and ocean conditions. Over the SCS, TC intensification rate and its probability for a rapid intensification (intensification by ≥ 15.4 m s−1 day−1) are only 1/2 and 1/3, respectively, of those for the rest of the world ocean. Originating from complex interplays between astronomic tides and the SCS topography, gigantic ocean internal tides interact with TC-generated oceanic near-inertial waves and induce a strong ocean cooling effect, suppressing the TC intensification. Inclusion of this interaction between internal tides and TC in operational weather prediction systems is expected to improve forecast of TC intensity in the SCS and in other regions where strong internal tides are present.

Date: 2024
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DOI: 10.1038/s41467-024-48003-y

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