Seasonally-reversed trends in the subtropical Northwestern Pacific linked to asymmetric AMO influences.

ABSTRACT: This study identifies seasonally-reversed trends in Kuroshio strength and sea surface temperatures (SSTs) within the western North Pacific (WNP) since the 1990s, specifically in the 22° N-28° N region. These trends are characterized by increases during summer and decreases during winter. The seasonally-reversed trends are a result of the asymmetric responses of the WNP to a shift towards the positive phase of the Atlantic multidecadal oscillation (AMO) around the same period. The positive AMO induces an anomalous descent over the North Pacific during summer, leading to the direct strengthening of the gyre. However, during winter, it triggers an anomalous descent over the tropical Pacific, which excites a poleward wavetrain impacting the WNP and causing gyre weakening. The associated respon

SUBMITTER: Lin YF 

PROVIDER: S-EPMC10447491 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature