The forcing mechanism leading to the Kuroshio intrusion into the South China Sea

Chau Ron Wu, Yi Chia Hsin

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

[1] We use a high-resolution numerical model to examine the forcing mechanism responsible for Kuroshio intrusion into the South China Sea (SCS). The collective wisdom is that variations in Kuroshio intrusion are closely related to the wind, inside or outside the SCS. A series of experiments was performed to identify the wind-related forcing regulating the intrusion. The experiments demonstrated that the importance of wind inside the SCS is greater than that outside the SCS. Furthermore, the northwestward Ekman drift due to northeasterly wind in winter intensifies the upstream Kuroshio in the Luzon Strait, enhancing the Kuroshio intrusion into the SCS. In particular, the wind stress curl (WSC) off southwest Taiwan is chiefly responsible for the Kuroshio intrusion. Both the WSC and intrusion show both seasonal and intraseasonal variation. As the negative WSC off southwest Taiwan becomes stronger, it contributes to anticyclonic circulation. The enhanced anticyclonic circulation helps the development of the Kuroshio intrusion. The consistency between WSC variability and the intrusion suggests that the WSC off southwest Taiwan is essential to the Kuroshio intrusion variability.

Original languageEnglish
Article numberC07015
JournalJournal of Geophysical Research: Oceans
Volume117
Issue number7
DOIs
Publication statusPublished - 2012

Fingerprint

Wind stress
South China Sea
intrusion
China
wind stress
Taiwan
Numerical models
intraseasonal variations
Experiments
sea
straits
annual variations
upstream
winter
strait
experiment

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Oceanography

Cite this

The forcing mechanism leading to the Kuroshio intrusion into the South China Sea. / Wu, Chau Ron; Hsin, Yi Chia.

In: Journal of Geophysical Research: Oceans, Vol. 117, No. 7, C07015, 2012.

Research output: Contribution to journalArticle

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