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Changes in the Characteristics of Summer Rainfall Caused by the Regime Shift in the Republic of Korea  

Moon, Ja-Yeon (International Pacific Research Center, University of Hawaii)
Park, Chang-Yong (Department of Geography, Konkuk University)
Choi, Young-Eun (Department of Geography, Konkuk University)
Publication Information
Journal of the Korean Geographical Society / v.46, no.3, 2011 , pp. 277-290 More about this Journal
Abstract
Changes of the characteristics in summer rainfall in the Republic of Korea by the regime shift and their causes were examined by analyzing long-term observational data. There has been an abrupt increase in rainfall variability since 1998, which was mainly due to the enhanced rainfall during August~September, although the gradual increase was also detected in June~July. In June~July, the enhanced rainfall developed as a band type covering the whole East Asia while in August~September, it is only found over the Republic of Korea with the greatest increase of 130 mm over Seoul and Gyeonggi area. The two intensified anticyclonic anomalies over the north-northwest/east of the Republic of Korea resulted in producing northerlies/southeasterlies, transporting cold/warm-wet air flows, respectively. The center of the convergence zone from the two separate systems located in the Republic of Korea, leading to a favorable condition for the development of the extreme rainfall. The enhanced barotropic anticyclonic anomalies also affected in warming the sea surface temperature anomalies covering from the eastern coast of East Asia to North Pacific Ocean, which in turn leaded to enhance warm air transporting back to the Republic of Korea.
Keywords
regime shift; summer rainfall; changma; post-changma;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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