Temperature Variability and Eddy‐Flow Interaction in the South of Oyashio Extension

Abstract

AbstractBased on observations and eddy‐resolving model products, this study investigates the temperature variability south of the Oyashio Extension (OE). During 2016–2021, six dramatic cold events, which significantly impact the local ecosystems, are captured by in situ and satellite observations. It reveals that interaction between the OE front (OEF) and anticyclonic mesoscale eddies originating from the Kuroshio Extension is responsible for these cold events. Accompanied by intense eddy‐flow baroclinic energy exchange, the OEF meanders to the south and favors a southward cold‐water intrusion. Further analysis illustrates that the cold events tend to occur during spring and autumn, which is associated with the seasonal evolutions of OEF and anticyclonic eddies.