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Analysis of extreme precipitation in Yeongdong region of Korea over the 48 years, 1972-2019
Journal of the Korean Data & Information Science Society 2021;32:821-51
Published online July 31, 2021;  https://doi.org/10.7465/jkdi.2021.32.4.821
© 2021 Korean Data and Information Science Society.

Jea-Heon Lee1 · Song-Lak Kang2

12Department of Atmospheric & Environmental Sciences, Gangneung-Wonju National University
Correspondence to: This research was supported by Basic Science Research Program through the NationalResearch Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A6A03044326), and Korea Foundation for the Advancement of Science & Creativity (KOFAC).
1 Researcher, Mesoscale & Microscale Meteorology Laboratory, Department of Atm-ospheric & Environmental Sciences, Gangneung-Wonju National University, Gang-neung 25457, Korea.
2 Professor, Mesoscale & Microscale Meteorology Laboratory, Department of Atmospheric & Environmental Sciences, Gangneung-Wonju National University, Gangneung 25457, Korea. E-mail: slkang@gwnu.ac.kr
Received April 15, 2021; Revised May 19, 2021; Accepted June 17, 2021.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Over the 48 years between 1972 and 2019, extreme hourly and daily precipitation events are analyzed at the three automated surface observation system (ASOS) stations of Daegwallyeong, Gangneung, and Taebaek in the Yeongdong region of Korea by generalized Pareto distribution (GPD). Each extreme event is extracted from the threshold excess based on the peak-over-threshold (POT) approach, which is highly suitable for GPD. With the GPDs, we estimate the return level and return period of 100 years of daily and hourly precipitation at the three stations. The result shows that the daily extreme precipitation is the most significant at Daegwallyeong when it has a return period of 5 to 20 years. At Gangneung, relatively high extreme precipitation is shown during the return period of more than 50 years. In addition, the 100-year return period presents the highest return level at Gangneung, in terms of both daily and hourly precipitation. Meanwhile, the hourly extreme precipitation has the highest precipitation and confidence intervals at Gangneung, followed by at Taebaek and then at Daegwallyeong.
Keywords : Extreme precipitation, GPD, POT.