태풍 통과 후 상층해양의 변동특성 연구

Abstract

Ocean responses to typhoon Ewiniar(0603) was investigated using observation data and 3-D numerical experiment in north western Pacific. The observation data were TMI(Tropical rainfall measuring mission Microwave Imager) Sea Surface Temperature(SST) of satellite, Sea Surface Height Anomaly(SSHA) of Jason-2, temperature profile of ARGO float, time series of measurements at Ieodo ocean research station(IORS) and best track of the Tokyo Regional Specialized Meteorological Center(RSMC-Tokyo). SST cooling to the typhoon Ewiniar(0603) strongly occurred in area that SSHA was lower than other area, mixed layer depth was thin, and thermocilne gradient was steep. Moreover, SST cooling did not get back to common year temperature within how many hours. Inertial motion kept cooling phenomenon during about 7 days and cold water was concentrated under sea surface. One of crucial factors influencing the typhoon intensity and intensification is the ocean thermal energy in the upper ocean. If Next typhoon pass within 7 days, intensity may be influenced by cooling ocean. The typhoon Ewiniar-induced SST cooling, plays an negative role on the next typhoon Bilis(0604) intensity.