The Double-Peaked El Niño and Its Physical Processes

Abstract Recently, El Niño diversity has been paid much attention because of its different global impacts. However, most studies have focused on a single warm peak in sea surface temperature anomalies (SSTAs), either the central Pacific or eastern Ocean. Here, we demonstrate from observational analyses that several recent events show double peaks SSTA—called “double-peaked (DP) Niño”—that only observed since 2000. The DP two centers, which grow concurrently but separately, both and Pacific. In general, atmospheric oceanic patterns are similar to those warm-pool (WP) development phase, such is developed by zonal advective feedback reduced wind speed anomalies. distinctive difference exists where second SSTA peak. addition, shows more anomalous precipitation along intertropical convergence zone (ITCZ) when compared with WP Niño. We peculiar ITCZ play critical role enhancing equatorial westerly stress anomalies, help develop deepening thermocline