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Summer monsoon rainfall patterns over South Korea and associated circulation features

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Summary

Seasonal summer monsoon (June through August) rainfall patterns over South Korea are classified by an objective method using data for a 40-year period (1961–2000). The rainfall patterns are represented by the percentage departures from the normal rainfall of 12 stations spread uniformly over South Korea. The statistical technique employed is the k-means (KM) clustering method. The Euclidean distance has been used as a measure of similarity between the patterns.

Four dominant types are obtained by this method. Intercorrelations among the types suggest that the dominant patterns are distinct. The summer monsoon rainfall shows an increasing trend. Investigation of the physical processes associated with these patterns using NCEP/NCAR Reanalysis data clearly reveals contrasting circulation features associated with the dominant types during the summer monsoon period. In particular, contrasting circulation features are related to the position, shape and strength of the North Pacific Subtropical High.

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Received October 30, 2000 Revised November 12, 2001

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Kim, BJ., Kripalani, R., Oh, JH. et al. Summer monsoon rainfall patterns over South Korea and associated circulation features. Theor Appl Climatol 72, 65–74 (2002). https://doi.org/10.1007/s007040200013

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  • DOI: https://doi.org/10.1007/s007040200013

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