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In recent several years, extremely high waves occasionally struck the Koreancoast of the East Sea and caused severe coastal disasters almost every winterseason. In this paper, characteristics of such high waves are reported byanalyzing wave records collected at multiple stations along the east coast ofKorea. Meteorological data obtained at relevant weather stations were alsoused in the analysis. The reason for appearance of the high waves wasidentified as the strong northeasters due to extra-tropical low pressuresystems that had been rapidly developing in the East Sea. The generalmechanism concerning the formation and spatial evolution of such strong lowpressure systems was more clearly understood through the synthetic analysisof the wave and meteorological data. In particular, the influence ofspatiotemporal features of the low pressure system on the resultingcharacteristics of the high waves was described in more detail in this study.Since the overall wave direction was also northeast, the first wave arrivaltime on the coastline became later for a wave station whose latitude islower. At present, however, the arrival time of such high waves on the coastas well as their intrinsic characteristics such as wave height and period arenot satisfactorily predicted by the daily weather forecast. Hence, it isnecessary to enhance predictability of the high waves by investigatingdevelopmental mechanisms of the strong low pressure system in the winterseason more thoroughly

Characteristics of high waves observed at multiple stations along the east coast of Korea