Shoaling of large-amplitude nonlinear internal waves at Dongsha Atoll in the northern South China Sea


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dc.contributor.author Fu, Ke-Hsien
dc.contributor.author Wang, YuHuai
dc.contributor.author St. Laurent, Louis C.
dc.contributor.author Simmons, Harper L.
dc.contributor.author Wang, Wang
dc.date.accessioned 2012-07-06T19:13:50Z
dc.date.available 2012-07-06T19:13:50Z
dc.date.issued 2012-02-10
dc.identifier.uri http://hdl.handle.net/1912/5256
dc.description Author Posting. © The Author(s), 2012. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Continental Shelf Research 37 (2012): 1-7, doi:10.1016/j.csr.2012.01.010. en_US
dc.description.abstract Shoaling of large-amplitude (~100 m) nonlinear internal waves over a steep slope (~3°) in water depths between 100 m and 285 m near Dongsha Atoll in the northern South China Sea is examined with an intensive array of thermistor moorings and a bottom mounted Acoustic Doppler Current Profiler. During the 44 h study period in May 5–7, 2008, there were four groups of large internal waves with semidiurnal modulation. In each wave group a rapid transition occurred during the shoaling, such that the front face of the leading depression wave elongated and plunged to the bottom and the rear face steepened and transformed into a bottom-trapped elevation wave. The transitions occur in water depths of 200 m and deeper, and represent the largest documented internal wave shoaling events. The observations repeatedly capture the detailed temperature and velocity structures of the incident plunging waves. Strong horizontal convergence and intense upward motion are found at the leading edge of transformed elevation waves, suggesting flow separation near the bottom. The observations are compared with the previous observations and model studies. The implication of the shoaling internal waves on coral reef ecology also is discussed. en_US
dc.description.sponsorship Support for LS and HS came from the US Office of Naval Research en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.relation.uri http://dx.doi.org/10.1016/j.csr.2012.01.010
dc.subject Internal waves en_US
dc.subject Shoaling en_US
dc.subject Bottom slope en_US
dc.subject South China Sea en_US
dc.subject Continental shelf en_US
dc.title Shoaling of large-amplitude nonlinear internal waves at Dongsha Atoll in the northern South China Sea en_US
dc.type Preprint en_US

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