Effect of the along-strait wind on the volume transport through the Tsushima/Korea Strait in September

Jae Hong Moon, Naoki Hirose, Jong Hwan Yoon, Ig Chan Pang

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    Recent investigation suggests that volume transport through the Tsushima/ Korea Strait often has double peaks during the summer to autumn period with decreasing transport in September. The satellite-observed wind changes from weak northwestward (across-strait) in summer to strong southwestward (along-strait) in early autumn (September) in the strait. Such a strong along-strait wind is related to tropical cyclones, which frequently pass through the East China Sea in September. The effect of the along-strait wind component on the transport variation is examined using a three-dimensional numerical model. The simulated volume transport through the Tsushima/Korea Strait shows realistic seasonal and intra-seasonal variations. According to sensitivity experiments on local winds, the transport variations in September are mainly generated by strong along-strait (southwestward) wind rather than weak across-strait wind. The strait transport responds to the along-strait wind (southeastward), which produces a sea level increase along the Korean coast, resulting in the geostrophic balance across the strait. The transport minimum through the Tsushima/Korea Strait in September can be determined by the combination of the across-strait geostrophic and along-strait ageostrophic balances.

    Original languageEnglish
    Pages (from-to)17-29
    Number of pages13
    JournalJournal of Oceanography
    Issue number1
    Publication statusPublished - Jan 9 2009


    All Science Journal Classification (ASJC) codes

    • Oceanography

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