Why does the Kuroshio northeast of Taiwan shift shelfward in winter?

Lie Yauw Oey, Yi Chia Hsin, Chau Ron Wu

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Observations indicate that off the northeastern coast of Taiwan a branch of the Kuroshio intrudes farther northward in winter onto the shelf of the East China Sea. We demonstrate that this seasonal shift can be explained solely by winter cooling. Cooling produces downslope flux of dense shelf water that is compensated by shelfward intrusion. Parabathic isopycnals steepen eastward in winter and couple with the cross-shelf topographic slope (the "JEBAR" effect) to balance the enhanced intrusion. The downslope flow also increases vortex stretching and decreases the thickness of the inertial boundary layer, resulting in a Kuroshio that shifts closer to the shelf break.

Original languageEnglish
Pages (from-to)413-426
Number of pages14
JournalOcean Dynamics
Volume60
Issue number2
DOIs
Publication statusPublished - 2010 Apr 1

Keywords

  • Cooling
  • Jebar
  • Kuroshio migration
  • Model simulation

ASJC Scopus subject areas

  • Oceanography

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