What is EQUINOO?
Equatorial Indian Ocean Oscillation (EQUINOO) is considered to be the atmospheric component of the Indian Ocean dipole mode. EQUINOO is deﬁned as the oscillation between a state in which the convection/precipitation is enhanced over Western Equatorial Indian Ocean (WEIO) and suppressed over the Eastern Equatorial Indian Ocean EEIO convection/precipitation is enhanced over EEIO and that in which convection/precipitation is enhanced over EEIO and suppressed over WEIO. Although the distinguishing attribute of EQUINOO is the see-saw in the convection over EEIO and WEIO, and the monsoon–EQUINOO link is manifested as a link between the outgoing long wave radiation (OLR) anomaly over the Indian region and that over the equatorial Indian Ocean.
The Indian summer monsoon picked up steam despite a delayed start due to a positive phase of Equatorial Indian Ocean Oscillation (EQUINOO).