Fate of internal waves on a shallow shelf

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Date
2020-04-21
Authors
Davis, Kristen A.
Arthur, Robert S.
Reid, Emma C.
Rogers, Justin S.
Fringer, Oliver B.
DeCarlo, Thomas M.
Cohen, Anne L.
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DOI
10.1029/2019JC015377
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Keywords
Internal waves
Distributed temperature sensing
Coral reef
Internal wave reflection
Abstract
Internal waves strongly influence the physical and chemical environment of coastal ecosystems worldwide. We report novel observations from a distributed temperature sensing (DTS) system that tracked the transformation of internal waves from the shelf break to the surf zone over a narrow shelf slope region in the South China Sea. The spatially continuous view of temperature fields provides a perspective of physical processes commonly available only in laboratory settings or numerical models, including internal wave reflection off a natural slope, shoreward transport of dense fluid within trapped cores, and observations of internal rundown (near‐bed, offshore‐directed jets of water preceding a breaking internal wave). Analysis shows that the fate of internal waves on this shelf—whether transmitted into shallow waters or reflected back offshore—is mediated by local water column density structure and background currents set by the previous shoaling internal waves, highlighting the importance of wave‐wave interactions in nearshore internal wave dynamics.
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Author Posting. © American Geophysical Union, 2020. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 125(5), (2020): e2019JC015377, doi:10.1029/2019JC015377.
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Davis, K. A., Arthur, R. S., Reid, E. C., Rogers, J. S., Fringer, O. B., Decarlo, T. M., & Cohen, A. L. (2020). Fate of internal waves on a shallow shelf. Journal of Geophysical Research: Oceans, 125(5), e2019JC015377.
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