Prototypical solitons in the South China Sea
Prototypical solitons in the South China Sea
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DOI：
10.1029/2006gl025932
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发表时间：
2006-06-09
影响因子：
5.2
通讯作者：
David, Laura
中科院分区：
文献类型：
--
作者：
Klymak, Jody M.;Pinkel, Robert;David, Laura
在南海西部陆坡和陆架的卫星图像中，经常可以看到与非线性内波相关的表面特征。在东方的深海观测是罕见的。在这里，我们报告的演变充满活力的包，因为它传播通过深中央盆地的南海，对西部斜坡和大陆架。这些波的振幅估计为170 m，半宽为3 km，相速度为2.9 +/- 0.1 m/s，快于模式1的线性相速度2.6 m/s。形状和观察到的相速度与Korteweg-deVries（KdV）模型在65公里的路径，他们被跟踪一致。与预先存在的剪切相比，波的固有速度剪切很小，并且波表现出弱湍流。KdV拟合和卫星衍生的水平波范围的估计意味着向西的能量通量为4.5 GW的每个波峰。
Surface signatures associated with non-linear internal waves are often seen in satellite images of the western South China Sea (SCS) slope and shelf. Observation in the deep sea, to the east, are rare. Here we report on the evolution of an energetic packet as it propagated through the deep central basin of the SCS, toward the western slope and shelf. The waves have amplitudes estimated at 170 m, half widths of 3 km, and phase speeds of 2.9 +/- 0.1 m/s, faster than the mode-1 linear phase speed of 2.6 m/s. The shape and observed phase speed were consistent with the Korteweg-deVries (KdV) model over the 65-km path that they were tracked. The intrinsic velocity shear of the waves is small compared to pre-existing shears, and the waves exhibit weak turbulence. The KdV fit and a satellite-derived estimate of horizontal wave extent imply a westward energy flux of 4.5 GW for each crest.