Low-frequency variability of monsoon-driven circulation with application to the South China Sea

TitleLow-frequency variability of monsoon-driven circulation with application to the South China Sea
Publication TypeJournal Article
Year of Publication2015
AuthorsYang H.Y, Wu L.X, Sun S.T, Chen Z.H
JournalJournal of Physical Oceanography
Volume45
Pagination1632-1650
Date Published2015/06
Type of ArticleArticle
ISBN Number0022-3670
Accession NumberWOS:000356227700010
Keywordsboundary current; circulation; double-gyre; dynamics; instability; interannual; large-scale; multiple equilibria; nonlinear dynamics; ocean; Ocean circulation; Ocean dynamics; part i; Potential vorticity; quasi-geostrophic model; Rossby waves; variability; wind-driven
Abstract

The interannual variability of the upper-ocean circulation forced by seasonally varying monsoonal wind is investigated in a two-layer quasigeostrophic (QG) model, with the aim to understand the low-frequency variability of the South China Sea (SCS) circulation. It is demonstrated that the seasonally varying monsoonal wind can force the upper-ocean circulation with significant internal variability, which is mainly associated with the intrinsic nonlinear dynamics of the summer double-gyre system. This arises from the fact that the intrinsic variability, characterized by the Rossby wave adjustment in the winter single-gyre system, is much weaker than that in the summer double-gyre system driven by the intergyre eddy potential vorticity flux through barotropic instability.

DOI10.1175/jpo-d-14-0212.1
Student Publication: 
Yes
Student: 
sharknado