The preliminary research of equatorial Pacific-Indian Ocean temperature anomaly mode and subsurface ocean temperature anomalies

This paper further studies the equatorial Pacific-Indian Ocean temperature anomaly mode on the sea surface and subsurface with the application of the empirical orthognal function (EOF) analysis of SODA temperature data from 1958 to 2001.Tem perature anomalies in the equatorial western Indian Ocean and eastern Pacific and that in the equatorial eastern Indian Ocean-western Pacific are inverse.The wavelet analysis shows that this mode has annual, interannual and interdecadal variability.Results of composite analyses disclose that anomalies of subsurface ocean temperature in the equat orial eastern Indian Ocean-western Pacific and their propagations along the thermocline have direct correlations with temperature anomalies in the equatorial western Indian Ocean and eastern Pacific.The anomalies of subsurface ocean temperature in the equatorial western Indian Ocean propagate to the eastern Indian Ocean, and anomalies in the equatorial eastern Pacific propagate to the western Pacific along about 10 N and 10 S, at the same time, the temperature ano malies in the equatorial eastern Indian Ocean western Pacific propagate westwards to the western Indian Ocean and east wards to the eastern Pacific along the equator respectively.