期刊
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷 108, 期 C3, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2001JC001163
关键词
internal waves; solitons; fine structure mixing; dissipation
类别
The conversion of depression nonlinear internal solitons to elevation internal waves has been observed twice at the South China Sea continental shelf break. Shipboard X-band radar, tow-yo CTD, ADCP and high frequency acoustic flow visualization of the process are presented. The data focuses on up slope propagation of depression internal solitons from a water depth of similar to264 m to a water depth of similar to110 m. Dissipation by large amplitude shear instabilities was observed. The kinetic energy density was found to be a decreasing monotonic function of range with an energy dissipation rate coefficient of 0.063 km(-1). The rate of energy dissipation over the similar to16.5 km soliton propagation path was 0.17 W/m/m. Simple numerical models of the waveform evolution are qualitatively compared to the observations. The observations, extracted scale parameters and dissipation rates should be useful for testing a variety of evolution equation representations of internal soliton propagation.
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