Abnormal Activities of Tropical Cyclones in 2019 Over the Korean Peninsula

Abstract

Approximately, 25.6 tropical cyclones (TCs) occur in the western North Pacific (WNP) each year, of which 3.4 TCs affect the Korean Peninsula (KP). In 2019, a record of seven TCs affected the KP. We investigated and elucidated the favorable conditions influencing the TCs approaching the KP using the Weather Research and Forecasting model version 4.0 (WRFv4). The cold Maritime Continent‐warm WNP sea surface temperature (SST) was found to be a major factor. The effect of the SST gradient was examined for one representative case using WRFv4 with varying SST anomalies. This study suggests that the SST gradient‐induced change in the circulation over the Maritime Continent is a main factor causing the TCs to approach the KP.

Trends and Spatio-Temporal Variability of Summer Mean and Extreme Precipitation across South Korea for 1973–2022

“…Following Preethi et al (2017), the summer monsoon precipitation over South Korea has displayed an increasing trend in the recent few decades. On the other hand, the second Changma is mainly associated with typhoons in late summer, and typhoons intensively affect the KP in July, August, and September (Lee et al 2017;Moon and Ha 2021). Heavy rainfall in the KP during the boreal summer needs to be investigated because the sub-seasonal variability is very large, even during summer.…”

Trends and Spatio-Temporal Variability of Summer Mean and Extreme Precipitation Events across South Korea for 1973-2022

“…The Changma is most active between early July and early September, with the first Changma starting in late June and ending in late July (Seo et al, 2011;Park et al, 2015). In addition, the second Changma is mainly associated with typhoons in late summer, and typhoons intensively affect the KP in July, August, and September (Lee et al, 2017;Moon & Ha, 2021). Heavy rainfall in the KP during the boreal summer needs to be investigated because the sub-seasonal variability is very large, even during summer.…”