Internal solitary waves of elevation advancing on a shoaling shelf

Details Internal solitary waves of elevation advancing on a shoaling shelf Internal solitary waves of elevation advancing on a shoaling shelf

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30toce3k&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 20, pp. OCE 3-1, CiteID 2045, DOI 10.1029/2003GL017706

Biology

46

Oceanography: Physical: Internal And Inertial Waves, Oceanography: General: Continental Shelf Processes, Oceanography: Physical: Turbulence, Diffusion, And Mixing Processes, Oceanography: Physical: Fine Structure And Microstructure, Oceanography: Physical: Sediment Transport

Scientific paper

A sequence of three internal solitary waves of elevation were observed propagating shoreward along a near-bottom density interface over Oregon's continental shelf. These waves are highly turbulent and coincide with enhanced optical backscatter, consistent with increased suspended sediments in the bottom boundary layer. Non-linear solitary wave solutions are employed to estimate wave speeds and energy. The waves are rank ordered in amplitude, phase speed, and energy, and inversely ordered in width. Wave kinetic energy is roughly twice the potential energy. The observed turbulence is not sufficiently large to dissipate the waves' energy before the waves reach the shore. Because of high wave velocities at the sea bed, bottom stress is inferred to be an important source of wave energy loss, unlike near-surface solitary waves. The wave solution suggests that the lead wave has a trapped core, implying enhanced cross-shelf transport of fluid and biology.

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