Abstract

Sea surface cooling (SSC) with the passage of typhoons is examined in the East Sea using the Japan Meteorological Agency buoy data <TEX>$(37^{\circ}45'N,\;134^{\circ}23'E)$</TEX> 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 <TEX>$-0.5^{\circ}C\;to\;-4.3^{\circ}C.$</TEX> Intense SSC <TEX>$(<-2^{\circ}C)$</TEX> 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 <TEX>$(24^{\circ}N\;to\;52^{\circ}N).$</TEX> 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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