Recent (30, 50 years) extreme precipitation characteristics and changing trends in Korea
박인기* ․ 서명석**†
Park, In-Gi* and Suh, Myoung-Seok**†
In this study, trends in extreme rainfall characteristics (Ext_Ra_Ch) were analyzed for 30-year (1993 ~ 2022) and 50-year (1973 ~ 2022) periods using observation data from 60 Korea Meteorological Administration stations. The quantile regression method was used to calculate trends in Ext_Ra_Ch for different accumulation hours (1, 3, 6, 12, 24 hours) and extreme levels (upper 0.5, 1, 2.5, 5, 10%). For Ext_Ra_Ch, the number of observing stations showing a tendency to increase and decrease was similar in the last 30 years, but in the last 50 years there was an increasing trend for most stations. The extreme rainfall intensity (ER_I) and frequency (ER_F) tended to increase significantly for short accumulation hours (< 6 h), while the change in amount of extreme rainfall (ER_A) tended to vary depending on the accumulation time and geographic location. ER_I and ER_F trends were negatively correlated in most cases, and the lower the extremity level, the stronger the negative correlation. However, ER_A and ER_F trends were positively correlated regardless of cumulative time and extremity level, and the higher the extremity level, the stronger the positive correlation. Although there were differences depending on the region and extremity level, ER_I and ER_F for short periods of less than 6 hours have increased significantly; thus, more in-depth research is needed on the causes of these phenomena.
140601-08.pdf
