South-north dipolar pattern around mid-1990s in Korean summer rainfall variability

摘要

From the time series of rainfall in summer (June, July and August) in South and North Koreas for recent 28 years (1981-2008), rainfall has significantly increased in South Korea while it has significantly decreased in North Korea since 1996. In particular, the decreasing trend of summer rainfall in North Korea was more conspicuous during the second Changma (late August - mid-September). This characteristic was also found in the south-north dipolar pattern based on 1996 by empirical orthogonal function analysis using summer rainfall observed in all weather observation stations in South and North Korea.