Stokes drift of plankton in linear internal waves: Cross‐shore transport of neutrally buoyant and depth‐keeping organisms
Stokes drift of plankton in linear internal waves: Cross‐shore transport of neutrally buoyant and depth‐keeping organisms
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线性内波中浮游生物的斯托克斯漂移：中性浮力和深度保持生物体的跨岸运输
DOI：
10.1002/lno.11389
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发表时间：
2019
影响因子：
4.5
通讯作者：
Lucas, Andrew J.
中科院分区：
文献类型：
--
作者：
Franks, Peter J. S.;Garwood, Jessica C.;Ouimet, Michael;Cortes, Jorge;Musgrave, Ruth C.;Lucas, Andrew J.
许多无脊椎动物和脊椎动物的浮游幼虫依靠物理运输将它们穿过大陆架移动到成虫栖息地。跨岸幼虫运输的一种潜在机制是内波中的斯托克斯漂移。在这里，我们发展了理论来量化浅水中线性内波中中性浮力和深度保持生物体的斯托克斯速度。我们将分析应用于理论和测量的内波场，并将结果与数值模型进行比较。在表面和底部边界附近，中性浮力和深度保持生物体都沿着波的相位传播方向输送。然而，中性浮力生物体在中深度以与波相位相反的方向运输，而深度保持生物体在那里的净运输量为零。弱深度保持生物体的斯托克斯在完美深度保持生物体和中性浮力生物体之间漂移。对于合理的波幅和相速，生物体将经历每秒几厘米的水平斯托克斯速度，或者在恒定波场中每天几公里。对于陆上极化内波，内波中的斯托克斯漂移为浮游幼虫和其他靠近表面的生物体的陆上运输以及中深度的近海运输提供了可预测的机制。
The meroplanktonic larvae of many invertebrate and vertebrate species rely on physical transport to move them across the shelf to their adult habitats. One potential mechanism for cross‐shore larval transport is Stokes drift in internal waves. Here, we develop theory to quantify the Stokes velocities of neutrally buoyant and depth‐keeping organisms in linear internal waves in shallow water. We apply the analyses to theoretical and measured internal wave fields, and compare results with a numerical model. Near the surface and bottom boundaries, both neutrally buoyant and depth‐keeping organisms were transported in the direction of the wave's phase propagation. However, neutrally buoyant organisms were transported in the opposite direction of the wave's phase at mid depths, while depth‐keeping organisms had zero net transport there. Weakly depth‐keeping organisms had Stokes drifts between the perfectly depth‐keeping and neutrally buoyant organisms. For reasonable wave amplitudes and phase speeds, organisms would experience horizontal Stokes speeds of several centimeters per second—or a few kilometers per day in a constant wave field. With onshore‐polarized internal waves, Stokes drift in internal waves presents a predictable mechanism for onshore transport of meroplanktonic larvae and other organisms near the surface, and offshore transport at mid depths.
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影响因子：
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DOI：
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发表时间：
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DOI：
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