Intra-seasonal variation in the velocity field of the northeastern South China Sea

Chau Ron Wu, T. Y. Tang, S. F. Lin

    Research output: Contribution to journalArticlepeer-review

    26 Citations (Scopus)

    Abstract

    Two subsurface Acoustic Doppler Current Profilers (ADCP) were deployed in the northeastern South China Sea to study the circulation structure in the area as well as the path and process of the Kuroshio intrusion. The 48 h low-pass filtered data, for the first time, reveal significant intra-seasonal variations in the velocity field. Flow is alternately cyclonic or anticyclonic even within a single month. Local wind forcing dominated by monsoon winds fails to address the phenomena. The present study suggests that intruding current patterns are likely triggered by the strong wind stress curls. Strong negative wind stress curls off the southern tip of Taiwan introduce negative vorticity to form anticyclonic circulation in the intruding current. With diminishing wind stress curls, the intruding current weakens, forming a cyclonic circulation pattern.

    Original languageEnglish
    Pages (from-to)2075-2083
    Number of pages9
    JournalContinental Shelf Research
    Volume25
    Issue number17
    DOIs
    Publication statusPublished - 2005 Nov 1

    Keywords

    • Eddies
    • Intra-seasonal variation
    • South China Sea
    • Wind stress curl

    ASJC Scopus subject areas

    • Oceanography
    • Aquatic Science
    • Geology

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