Analyzing the Impact of Typhoon MINDULLE (2116) on South Korea's Extreme Temperatures Using WRF

During October 2021, South Korea experienced an unprecedented heatwave, yet the factors behind it remained elusive. Simultaneously, Typhoon MINDULLE (2116), originating in the Northwest Pacific, approached the Korean Peninsula. The aim of this study was to analyze the influence of Typhoon MINDULLE on the extreme warming in October. Using the Weather Research and Forecasting (WRF) model, we conducted two experiments for comparison: one considering the presence of typhoon (TC) and the other eliminating typhoon (TC-removed). The results showed that temperatures on the Korean Peninsula in the first half of October were 1.35°C higher with TC than with TC-removed. Additionally, the typhoon contributed to enhanced moisture and stronger southerly winds. It intensified warm air advection, leading to the amplified temperatures experienced in South Korea. This study suggests that it is essential to consider typhoons as a significant factor when studying autumn heatwaves.