Author:
Klose Ann Kristin,van Westen René M.,Dijkstra Henk A.
Abstract
Abstract. The Kuroshio Current System in the North Pacific displays path
transitions on a decadal timescale. It is known that both internal variability
involving barotropic and baroclinic instabilities and remote Rossby waves
induced by North Pacific wind stress anomalies are involved in these
path transitions. However, the precise coupling of both processes and
its consequences for the dominant decadal transition timescale are still
under discussion. Here, we analyse the output of a multi-centennial
high-resolution global climate model simulation and study phase
synchronisation between Pacific zonal wind stress anomalies and Kuroshio
Current System path variability. We apply the Hilbert transform technique
to determine the phase and find epochs where such phase synchronisation
appears. The physics of this synchronisation are shown to occur through
the effect of the vertical motion of isopycnals, as induced by the propagating
Rossby waves, on the instabilities of the Kuroshio Current System.
Subject
Cell Biology,Developmental Biology,Embryology,Anatomy
Cited by
2 articles.
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