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KMID : 1024520150240121657
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Journal of the Environmental Sciences
2015 Volume.24 No. 12 p.1657 ~ p.1671
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Characteristics of Variation of Sea Surface Temperature in the East Sea with the Passage of Typhoons
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Park Myung-Hee
Lee Joon-Soo
Suh Young-Sang
Kim Hae-Dong
Bae Hun-Kyun
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Abstract
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In this study, the wind direction and the wind speed of the nearest temperature observations point of the National Weather Service was analyzed in order to investigate the rapid rise and drop of water temperature in the East Coast appeared after passing of the 2015 typhoon No. 9 and 11. Then the figures were simulated and analyzed using the WRF(weather research and forecast) model to investigate in more detailed path of the typhoon as well as the changes in the wind field. The results were as follows. A sudden drop of water temperature was confirmed due to upwelling on the East coast when ninth typhoon Chanhom is transformed from tropical cyclones into extra tropical cyclone, then kept moving eastwards from Pyongyang forming a strong southerly wind after 13th and this phenomenon lasted for two days. The high SST(sea surface temperature) is confirmed due to a strong northerly wind by 11th typhoon Nangka. This strong wind directly affected the east coast for three days causing the Ekman effect which transported high offshore surface waters to the coast. The downwelling occurred causing an accumulation of high temperature surface water. As a results, the SST of 15m and 25m rose to that of 5m.
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KEYWORD
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Typhoon, SST, Wind direction, Ekman transport, WRF model
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