THE INTERANNUAL VARIABILITY OF SEA SURFACE TEMPERATURE AND SURFACE WIND FIELD IN THE TROPICAL OCEANS AND THE CORRE-LATION WITH THE ENSO CYCLE

Utilizing the NCEP/NCAR reanalysis monthly data,and using filter and mean variance calculation,the interannual variability in sea surface temperature (SST) and 1000hPa wind field for the Pacific,Indian,and Atlantic Oceans is investigated for 20 years (1979-1998).The characters of time-space evolution in sea surface temperature anomaly (SSTA) for each ocean and corresponding wind anomaly field are at tained using rotated principal component and projection analysis methods.Using the method of correlation analysis,the characters of three tropical oceans correlated with ENSO are investigated.The contemporary correlation between the SSTA in the Indian Ocean and the SSTA in the equatorial east Pacific is positive,and there is a weak anticorrelation between the SSTA in the equatorial east At lantic Ocean and the SSTA in the equatorial east Pacific.The SSTA in the equatorial Indian Ocean lags by 3 months the dominant Pacific ENSO mode,and the SSTA in the equatorial At lantic Ocean leads by 6 months the dominant Pacific ENSO mode when the positive correlation and the anticorrelation reach to the most.The component correlated with ENSO in tropical Indian Ocean and tropical Atlantic Ocean display much the same amount of total variance in each ocean i.e.,14% in the Indian Oceans and 12% in the At lantic Ocean and the maximum is al above 40%.