Future changes in tropical cyclone (TC) activity over the western North Pacific (WNP) under the representative concentration pathway RCP4.5 are investigated based on a set of 21st century climate change simulations over East Asia with the regional climate model RegCM4 driven by five global models. The RegCM4 reproduces the major features of the observed TC activity over the region in the present-day period of 1986–2005, although with the underestimation of the number of TC genesis and intensity. A low number of TCs making landfall over China is also simulated. By the end of the 21st century (2079–98), the annual mean frequency of TC genesis and occurrence is projected to increase over the WNP by 16% and 10%, respectively. The increase in frequency of TC occurrence is in good agreement among the simulations, with the largest increase over the ocean surrounding Taiwan Island and to the south of Japan. The TCs tend to be stronger in the future compared to the present-day period of 1986–2005, with a large increase in the frequency of strong TCs. In addition, more TCs landings are projected over most of the China coast, with an increase of ∼18% over the whole Chinese territory.
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The authors would like to thank the three anonymous reviewers for their valuable comments on this work. This research was jointly supported by the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA20060401), the National Natural Science Foundation of China (Grant No. 41675103), and the Science and Technology Program of Yunnan (Grant No. 2018BC007). The authors acknowledge Geophysical Fluid Dynamics Laboratory for providing the TSTORMS (Detection and Diagnosis of Tropical Storms in High-Resolution Atmospheric Models) software code (available from https://www.gfdl.noaa.gov/tstorms/) to detect and track tropical cyclones in the present study.
• A set of regional climate model RegCM4 simulations at 25-km grid spacing driven by five global models over East Asia was used.
• RegCM4 reproduces the major features of the observed tropical cyclone activity over the region in the present-day period.
• Tropical cyclones tend to be stronger in the future, with more tropical cyclones making landfall over China
This paper is a contribution to the special issue on the Climate Change and Variability of Tropical Cyclone Activity
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Wu, J., Gao, X., Zhu, Y. et al. Projection of the Future Changes in Tropical Cyclone Activity Affecting East Asia over the Western North Pacific Based on Multi-RegCM4 Simulations. Adv. Atmos. Sci. (2021). https://doi.org/10.1007/s00376-021-0286-9
- regional climate model
- tropical cyclone
- western North Pacific