The IPO is a leading mode of sea surface temperatures (SSTs) seen mostly in the Paciﬁc Ocean.
This interpretation of IPO by LONG PADDOCK
SOME OTHER TIME SERIES GRAPHS
“The interdecadal Pacific oscillation (IPO or ID) displays similar sea-surface temperature (SST) and sea-level pressure (SLP) patterns, with a cycle of 15–30 years, but affects both the north and south Pacific. In the tropical Pacific, maximum SST anomalies are found away from the equator. This is quite different from the quasi-decadal oscillation (QDO) with a period of 8-to-12 years and maximum SST anomalies straddling the equator, thus resembling the ENSO.”