Effect of the along-strait wind on the volume transport through the Tsushima/Korea Strait in September |
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| Authors: | Jae-Hong Moon Naoki Hirose Jong-Hwan Yoon Ig-Chan Pang |
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| Institution: | (1) Department of Earth System Science and Technology, Interdisciplinary Graduate School of Engineering Science, Kyushu University, Kasuga-Koen, Kasuga 816-8580, Japan;(2) Research Institute for Applied Mechanics, Kyushu University, Kasuga-Koen, Kasuga 816-8580, Japan;(3) Department of Oceanography, Cheju National University, Jeju, 690-756, Korea |
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| Abstract: | 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.
The Editor-in-Chief does not recommend the usage of the term “Japan/East Sea” in place of “Sea of Japan”. |
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| Keywords: | Volume transport Tsushima/Korea Strait along-strait wind sensitivity experiments |
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