On the generation of internal waves by river plumes in subcritical initial conditions.
On the generation of internal waves by river plumes in subcritical initial conditions.
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DOI：
10.1038/s41598-021-81464-5
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发表时间：
2021-01-21
影响因子：
4.6
通讯作者：
Dias JM
中科院分区：
文献类型：
--
作者：
Mendes R;da Silva JCB;Magalhaes JM;St-Denis B;Bourgault D;Pinto J;Dias JM
海洋中的内波（IWs）跨越广泛的时间和空间尺度，现在被认为是湍流和混合的重要来源，最大的观测值具有200米的振幅和接近0.5 m s−1的垂直速度。它们的起源主要是潮汐，但也观察到越来越多的非潮汐生成机制。例如，河流羽流提供水平传播的密度锋，观察到从超临界流过渡到亚临界流时会产生IWs。在这项研究中，卫星图像和自主水下测量相结合的数值模拟，调查IW代从最初的亚临界密度前起源于杜罗河羽（伊比利亚西部海岸）。这些前所未有的结果可能有重要的影响，在近岸动态，因为这表明，中等流量的河流可能发挥重要作用，在淡水河流和沿海沃茨之间的IW生成。
Internal waves (IWs) in the ocean span across a wide range of time and spatial scales and are now acknowledged as important sources of turbulence and mixing, with the largest observations having 200 m in amplitude and vertical velocities close to 0.5 m s−1. Their origin is mostly tidal, but an increasing number of non-tidal generation mechanisms have also been observed. For instance, river plumes provide horizontally propagating density fronts, which were observed to generate IWs when transitioning from supercritical to subcritical flow. In this study, satellite imagery and autonomous underwater measurements are combined with numerical modeling to investigate IW generation from an initial subcritical density front originating at the Douro River plume (western Iberian coast). These unprecedented results may have important implications in near-shore dynamics since that suggest that rivers of moderate flow may play an important role in IW generation between fresh riverine and coastal waters.
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影响因子：
2.2
作者：
Bourgault, D;Kelley, DE
通讯作者：
Kelley, DE
影响因子：
3.6
作者：
da Silva, JCB;Ermakov, SA;Kijashko, SV
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Kijashko, SV
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56.9
作者：
Farmer, D;Armi, L
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作者：
Hagolle, O.;Huc, M.;Dedieu, G.
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Dedieu, G.
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作者：
HAURY, LR;BRISCOE, MG;ORR, MH
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ORR, MH