Floats and f/H
Floats and f/H
复制标题
浮点数和 f/H
DOI：
10.1357/002224000321511205
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发表时间：
2000
影响因子：
0.5
通讯作者：
J. LaCasce
中科院分区：
文献类型：
--
作者：
J. LaCasce
海洋浮子分散的f/H，其中H是一个空间过滤的水深表示的敏感性，检查与来自大西洋和太平洋的浮子。的第一和第二时刻的位移相对于flH被发现，并比较那些纬向和纬向位移。在所有情况下，相对于f/H的力矩显示出与相对于地理坐标的力矩相等或更大的各向异性，这表明了沿沿着f/H传播的优先趋势。在地形平坦的地区（赤道、南大西洋内陆和北太平洋），沿沿着的输运比沿纬线的输运大得多，并且相对于f/H的矩基本相同。但是，在地形陡峭的地方（北大西洋和赤道和南大西洋的西部边界附近），即使地理矩是各向同性的或增强的，相对于f/H的各向异性传播也会发生，结果就不同了。只有在北太平洋，那里的地形规模较小，不太陡峭，在地理坐标上的传播更各向异性。本方法使用随机模型的轨迹进行了测试，并正确地表明，不存在这样的趋势蔓延沿着f/H。平均和涡流的影响进行了讨论，但不被认为是很好地解决。
The sensitivity of oceanic float dispersion to f/H, where H is a spatially filtered representation of the water depth, is examined with floats from the Atlantic and Pacific oceans. The first and second moments of the displacements relative to flH were found and compared to those for zonal and meridional displacements. In all cases, the moments relative to f/H display equal or greater anisotropy than those relative to geographical coordinates, suggesting a preferred tendency for spreading along f/H. In regions where the topography is flat (at the equator, in the interior South Atlantic and in the North Pacific), transport is much greater along than across latitude lines, and the moments relative to f/H are essentially the same. But the results differ where the topography is steep (the North Atlantic and near the western boundary in the Equatorial and South Atlantic), where anisotropic spreading relative to f/H occurs even though the geographical moments are isotropic or meridionally-enhanced. Only in the North Pacific, where the topography is smaller scale and less steep, is the spreading more anisotropic in geographical coordinates. The present method is tested using trajectories from a stochastic model, and correctly shows that no such tendency for spreading along f/H exists. Mean and eddy effects are discussed, but are not believed to be well resolved.