Extended Abstract

Regional Impact of Climate Change in Korea Rainfall ExtremesJONGPIL KIM 1 , GWANGSEOB KIM 2 and JAE HONG PARK 31 Ph.D. Student of School of Archi. and Civil Engineering, Kyungpook NationalUniversity and Researcher of Brain Korea 21, Korea (jpkim@knu.ac.kr)2 Professor of School of Archi. and Civil Engineering, Kyungpook National Universityand Researcher of Climate Change Research Center, Korea (kimgs@knu.ac.kr)3 Professor of Department of Civil Engineering, Semyung University, Korea(jhpark@semyung.ac.kr)1. IntroductionRegional i mpacts of climate c hange hav e dem onstrated v arious c hanges i nprecipitation, air temperature, sea surface temperature, sea level and so on. Alongwith g lobal w arming, natural di sasters such as f lood and drought also ha veincreased for several decades. According to the 2007 Fourth Assessment Report bythe Intergovernmental P anel o n C limate C hange ( IPCC), climate c hange app earsclearly in hydrometeorological m easurements. Also this r eport i ndicates that theoccurrence of extreme events such as localized torrential downpour and h eat wavewas more frequent than before.The pattern of precipitation change in South Korea can be summarized as: the totalrain days per year have decreased and annual precipitation has increased thereforethe number of heavy rain days (over 80 mm/day) ha s increased. Moreover resultsfrom the linear regression analysis of the Korea annual rainfall for 1905-2004 showthat rainfall for r ecent 30 y ears has increased m ore dr amatically than t hat of t hewhole duration (Kim et al., 2009). In the study of Schonwiese and Rapp (1997), theprecipitation i n Northern E urope w as i ncreased w hile t he pr ecipitation i n S outhernEurope w as dec reased. These studies indicate t hat climate c hange can causedifferent trends of precipitation through the local features. In this study, the regionalimpact of climate change in Korea rainfall extreme was evaluated according to thedifference o f el evation, deg ree o f urbanization, l ongitude, l atitude, i nland/seaside,basins using the hourly nationwide precipitation data from 1973 to 2009.2. Materials and Methods2.1 Data DescriptionTo analyze the regional impact of climate change in Korea rainfall extremes, t rendanalysis was per formed us ing 59 w eather s tation data(Fig. 1 ) from 1 973 to 2 009which ar e o perated by K orea M eteorological A dministration ( KMA). T he an nualmaxima of consecutive rainfalls for eight rainfall durations (i.e. 1, 2, 3, 6, 12, 24, 48and 72 hours) were analyzed using hourly precipitation measurements t o evaluatethe quantitative change of rainfall extremes. In addition, the number of rain days overnine thresholds (i.e. 0, 10, 20, 30, 40, 50, 60, 70 and 80 mm/day) were analyzed toevaluate the frequency change of extremes. To evaluate the regional impact in more-269-