By using the negative directions algorithm of “recursive resolve”,the content characteristics of dynamical evolution are revealed for inter monthly differences of Equatorial Eastern Pacific monthly mean SST in 1951.1~1997.12,showing the inter decadal variations and abrupt changes of SST.Relations of the content characteristic with ENSO cycles,the total ozone over the both Hemispheres and inter decadal variations of northern Hemisphere tropospheric and stratospheric temperatuers are also discussed.At last,comparison shows that the content of “recursive resolve” is more sensitive to the inter decadal variations of SST in the region than traditional statistical series.