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Characteristics of tropical cyclone-induced precipitation over the Korean River basins according to three evolution patterns of the Central-Pacific El Niño |
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| Authors: | Chan-Young Son Jong-Suk Kim Young-Il Moon Joo-Heon Lee |
| Institution: | 1. Department of Civil Engineering, University of Seoul, Seoul, 130-743, Korea 2. Urban Flood Research Institute, University of Seoul, Seoul, Korea 3. Department of Civil Engineering, Joongbu University, Chung-nam, Korea |
| Abstract: | This study carried out a comparative analysis of the changes in tropical cyclone (TC) genesis, TC track, and TC intensity focusing on TCs that affected the Korean peninsula (KP) according to three evolutionary patterns (prolonged, abrupt and symmetric-decay) of the abnormal sea surface temperature in the Central-Pacific (CP) region. As a result of the analysis, the activity pattern of TCs was found to vary depending on the evolution patterns of the CP El Niño, and such changes appeared to result in clear variations in the regional rainfall in Korea. In the prolonged-decaying and symmetric-decaying years, the KP received considerable TC rainfall. On the other hand, in abrupt-decaying years, it was subtly affected by the TC rainfall. Although rather limited conditions and relatively short observation data were used to analyze the effects of the evolution pattern of the CP El Niño on TCs, the results can be used to quantitatively identify the spatial features of TCs affecting the KP. These results are expected to be helpful in managing the disaster risks in vulnerable areas, including plans to secure stable water resources in the basin, and in establishing effective and active measures to cope with natural disasters by extreme events over the KP. |
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