Global correlation of mesoscale ocean variability with seafloor roughness from satellite altimetry
Global correlation of mesoscale ocean variability with seafloor roughness from satellite altimetry
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DOI：
10.1029/1999gl007003
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发表时间：
2000-05
影响因子：
5.2
通讯作者：
S. Gille;Mara Yale;D. Sandwell
中科院分区：
文献类型：
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作者：
S. Gille;Mara Yale;D. Sandwell
利用卫星高度计可以估计海底水深和海洋表面的涡动动能。比较这两个数量表明，在海洋区域的深度超过约4800米，表面涡动动能是大于平滑的深海平原比粗糙的测深，而相反的是在较浅的沃茨。因此，在深海，海底粗糙度可能会耗散涡流动能。一个简单的模型表明，耗散率随着均方根底部粗糙度从0增加到250米而增加，并在更高的粗糙度下减小到负值（意味着涡流的产生）。
Both seafloor bathymetry and eddy kinetic energy at the ocean surface can be estimated by making use of satellite altimeters. Comparing the two quantities shows that in regions of the ocean deeper than about 4800m, surface eddy kinetic energy is greater over smooth abyssal plains than over rough bathymetry, while the opposite is true in shallower waters. Thus in the deep ocean, bottom roughness may dissipate eddy kinetic energy. A simple model indicates that the dissipation rate increases as root‐mean‐squared bottom roughness increases from 0 to 250 m and decreases to negative values (implying eddy generation) for higher roughness.