태풍통과시 동해에서의 해수면 냉각현상
Sea Surface Cooling in the East Sea with the Passage of Typhoons
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Abstract
Sea surface cooling (SSC) with the passage of typhoons is examined in the East Sea using the Japan Meteorological Agency buoy data (37°45'N, 134°23'E) during 1983-2000 and a three-dimensional primitive equation model (the Princeton Ocean Model). Forty typhoons in this period induced the SST decrease ranging from about -0.5℃ to -4.3℃. Intense SSC (<-2℃) occurs with typhoons that passed mainly through the left-hand side of the buoy station. The model is implemented to examine a physical process of SSC with a typical-track typhoon in the northwestern Pacific (24°N to 52°N). The model well reproduces prominent features in the observation and addresses how it happens; SSC is induced mainly by momentum mixing effect stirred with the typhoon rather than upwelling.
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