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An analytical model with three sub-regions for m2 tide in the yellow sea and the East China Sea

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Abstract

In this study an analytical tide model of uniform width with three sub-regions is presented. The three-subregions model takes into account step-like variations in depths in the direction of the channel as a way to examine the M2 tide of the East China Sea (ECS) as well as the Yellow Sea (YS). A modified Proudman radiation condition has been applied at the northern open head, while the sea surface elevation is specified at the southern open boundary. It is seen that, due to the presence of an abrupt change in depth, co-amplitude lines of the M2 tide are splitted to the east and west near the end of the ECS shelf region. Variations in depths, bottom friction and the open head boundary conditions all contribute to the determination of formation of amphidromes as well as overall patterns of M2 tidal distribution. It is seen that increasing water depth and bottom friction in the ECS shelf results in the westward shift of the southern amphidrome. There is however no hint at all of the well-known degenerated tidal pattern being formed. It is inferred that a lateral variation of water depth has to be somehow incorporated to represent the tidal patterns in ECS in a realistic manner. Regarding the radiation factor introduced by Fang et al. (1991), use of a value larger than one, possibly with a phase shift, appears to be a proper way of incorporating the reflected waves from the northern Yellow Sea (NYS). Key words - analytical model, M2 tide, Kelvin wave, Yellow Sea, East China Sea

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Authors and Affiliations

  1. Ocean Energy & Environmental Engineering Research Division, Ansan P.O. Box 29, 425-600, KORDI, Seoul, Korea

    Kyung Tae Jung & Jae Kwi So

  2. School of Earth and Environmental Science, College of Natural Sciences, Seoul National University, 151-747, Seoul, Korea

    Chang Wook Park & Im Sang Oh

Authors
  1. Kyung Tae Jung
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  2. Chang Wook Park
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  3. Im Sang Oh
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  4. Jae Kwi So
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Correspondence to Chang Wook Park.

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Jung, K.T., Park, C.W., Oh, I.S. et al. An analytical model with three sub-regions for m2 tide in the yellow sea and the East China Sea. Ocean Sci. J. 40, 191–200 (2005). https://doi.org/10.1007/BF03023518

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  • DOI: https://doi.org/10.1007/BF03023518

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