A study of the dynamic factors of the summer-time upwelling in the Tsushima Warm Current region

Satoshi Nakada, You Ichiro Sasajima, Naoki Hirose, Yutaka Yoshikawa, Jong Hwan Yoon

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The dynamic factors governing the summer-time upwelling along the Japanese shelf area and its structures are examined using an eddy-resolving ocean general circulation model. A sensitivity experiment suggests that the dominant factor is the topographic irregularities that enhance the upwelling along the shelf slope but the influences of the seasonal variation of the Tsushima Warm Current (TWC) inflow and wind stress are insignificant. The dynamic analysis shows that the upwelling is a part of the secondary, overturning circulation that appears along the shelf from April to October. The dynamic structure shows the dominant term balance in essence, i.e. a triad of the term of pressure gradient, Coriolis force, and horizontal advection. The local pattern of the upwelling is closely correlated to the horizontal variations of the shelf slope and the horizontal advection term. The horizontal variation in the shelf topography is a key factor to determine the local pattern of the summer-time upwelling.

    Original languageEnglish
    Pages (from-to)1799-1808
    Number of pages10
    JournalDeep-Sea Research Part II: Topical Studies in Oceanography
    Volume57
    Issue number19-20
    DOIs
    Publication statusPublished - Oct 1 2010

    All Science Journal Classification (ASJC) codes

    • Oceanography

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