Understanding the Eastward Shift and Intensification of the ENSO Teleconnection Over South Pacific and Antarctica Under Greenhouse Warming

The Pacific–South America (PSA) teleconnection pattern triggered by the El Niño/Southern Oscillation (ENSO) is suggested to be moving eastward and intensifying under global warming. However, underlying mechanism not completely understood. Previous studies have proposed that movement of PSA attributable shift tropical Pacific ENSO-driven rainfall anomalies in response projected Niño-like sea surface temperature (SST) warming pattern. In this study, we found with uniform warming, models will also simulate an pattern, without impact uneven SST Further investigation reveals future changes climatology atmospheric circulation, particularly exit region subtropical jet stream, can contribute modifying conversion mean kinetic energy eddy energy.