Mean Flow Generation on a Continental Margin by Periodic Wind Forcing
Mean Flow Generation on a Continental Margin by Periodic Wind Forcing
复制标题
周期性风力强迫在大陆边缘产生平均气流
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
J. Allen
中科院分区：
文献类型：
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作者：
D. Denbo;J. Allen
摘要：本文采用带底摩擦的风强迫f面模型，研究了大陆边缘上强迫正压陆架波非线性相互作用对沿岸平均流的产生，试图建立一个极东边界潜流模型。假定罗斯比数很小，流服从长波近似。周期性沿海岸移动的沿岸风应力通过海岸上的非零风应力（沿海强迫）或由风应力-旋流驱动的在斜坡上成像的洋流（内部强迫）来迫使流体。根据最低阶周期速度，推导出沿岸(v)和跨陆架(u)平均速度的表达式。导出了vux相关系数的表达式，其中x是跨大陆架坐标，该表达式仅取决于底部坡度的符号、摩擦的大小、当地水深和强迫频率。表面的动量通量和雷诺应力…
Abstract The generation of an alongshore mean flow by the nonlinear interaction of forced barotropic shelf waves over a continental margin is studied using a wind-forced, f-plane model with bottom friction in an attempt to develop a model for poleward eastern boundary undercurrents. It is assumed that the Rossby number is small and that the flow obeys a long-wave approximations. A periodic alongshore wind stress traveling along the coast forces the fluid by a nonzero wind stress at the coast (coastal forcing) or by a wind-stress-curl-driven oceanic flow that images on the slope (interior forcing). Expressions are derived for the alongshore (v) and cross-shelf (u) mean velocities in terms of the lowest order periodic velocities. An expression for the correlation coefficients of vux, where x is the cross-shelf coordinate, is derived that depends only on the sign of the bottom slope, the magnitude of friction, the local water depth and the forcing frequency. The momentum flux and Reynolds stress in the surfa...