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http://dx.doi.org/10.5467/JKESS.2012.33.1.49

Decadal Change of Frequency in Korea Landfalling Tropical Cyclone Activity  

Choi, Ki-Seon (National Typhoon Center/Korea Meteorological Administration)
Cha, Yu-Mi (National Typhoon Center/Korea Meteorological Administration)
Kim, Tae-Ryong (National Typhoon Center/Korea Meteorological Administration)
Publication Information
Journal of the Korean earth science society / v.33, no.1, 2012 , pp. 49-58 More about this Journal
Abstract
Through a statistical change-point analysis, this study found that Korea landfalling tropical cyclone (TC) frequency has increased rapidly since 1981. This increase is due to the following phenomenon. When anomalous cyclone is developed in the East Asian continent, anomalous anticyclone is reinforced in the western Pacific, which is related to the eastward shift of western North Pacific high, and thus anomalous southerly is formed to Korea from low-latitudes. This anomalous southerly plays an important role as steering flow in moving TCs toward Korea. To examine the cause of the development of anomalous cyclone in the East Asian continent, this study analyzed the water equivalent of accumulated snow depth during the preceding spring (March to May). As a result, less snow depth is observed in most regions of the East Asian continent than before 1981. Therefore, anomalous cyclone in the East Asian continent in summer can be reinforced by the land heating from the preceding spring and then the steering flow of anomalous southerly that moves TCs toward Korea can be also developed to Korea from low-latitudes in summer.
Keywords
statistical change-point analysis; typhoon; western North Pacific high;
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Times Cited By KSCI : 6  (Citation Analysis)
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