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Tidal pump at the shelf edge

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Abstract

Material transport through the shelf edge to the deep ocean determines the fate of particulate matter generated in productive coastal seas. In stratified estuaries, onshore flow in the bottom layer generally keeps particulate matter generated in the upper layer and settled down to the bottom layer within the estuaries. AT the shelf edge of Tokyo Bay under the condition of average onshore flow in the bottom layer, we observed higher vertical sediment flux during ebb than flood tidal currents. The on-shelf and off-shelf differences in turbulent mixing and water depth mainly cause such difference in sediment flux. We propose to call this export process of particulate matter “the tidal pump” at the shelf edge.

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Authors and Affiliations

  1. Department of Civil and Ocean Engineering, Ehime University, 790, Matsuyama, Japan

    T. Yanagi & M. Shimizu

  2. Ocean Research Institute, University of Tokyo, Minami-dai 1-15-1, Nakano-ku, 130, Tokyo, Japan

    T. Saino

  3. Tokyo University of Fisheries, Koman 4-5-7, Minato-ku, 108, Tokyo, Japan

    T. Ishimaru

Authors
  1. T. Yanagi
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  2. M. Shimizu
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  3. T. Saino
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  4. T. Ishimaru
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Yanagi, T., Shimizu, M., Saino, T. et al. Tidal pump at the shelf edge. J Oceanogr 48, 13–21 (1992). https://doi.org/10.1007/BF02234029

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  • DOI: https://doi.org/10.1007/BF02234029

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