[A-AS04] 台風研究の新展開～過去・現在・未来

[AAS04-P07] The Dangers of More Frequent, Stronger Autumn Typhoons in the Northwest Pacific

*Woo-Sik Jung¹、HANA NA¹ (1.Department of Atmospheric Environment Information Engineering, INJE University.)

キーワード：Autumn typhoon, Summer typhoon, Northwest pacific typhoon, WRN, Typhoon-Reday System (TRS)

Recently, the frequency of abnormal weather phenomena has been increasing worldwide due to continued global warming and climate change (IPCC, 2021). The characteristics of typhoons affecting the Korean Peninsula have also shown much variation from past events. In Korea, the more damaging typhoons tend to occur in the fall (for instance, Typhoon Saraho, Typhoon Rusa, and Typhoon Maemi, which occurred in 1959, 2002, and 2003 respectively.). "Autumn typhoons” are those affecting the Korean Peninsula in September and October, and have become more frequent while remaining strong, resulting in extensive casualties and property damage across the Korean Peninsula. Typhoons are accompanied by strong winds and heavy rains, which have a significant impact on humans and their property. However, they are not generally recognised by the Korean people in summer, but in autumn, when the risk is very low, they can be more severe in agriculture and fisheries. Integrated information-based research is required into autumn typhoons, including disaster prevention studies to reduce the damage they cause; similarly, the characteristics (frequency and intensity) of autumn typhoons should be analysed based on long-term data. Therefore, this study analysed the frequency and intensity of influence by comparing the characteristics of autumn typhoons on the Korean Peninsula with those of summer typhoons. The frequency and intensity of the influence of autumn typhoons(maximum wind speed, maximum instantaneous wind speed, cumulative precipitation, etc.) increased rapidly. The intensity of the autumn typhoons was higher than that of the summer typhoons, and this increase also accelerated with time. This study analysed characteristics of former and recent typhoons that affected the Korean Peninsula from the past to the present, as well as those of autumn typhoons, which have recently attracted much attention. Based on these results, if the field-applied information available in the pre-disaster field is derived, it can be considered as a disaster prevention dataset to help reduce the damage caused by summer and autumn typhoons on the Korean Peninsula.

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. 2020R1F1A1068738)