Shoaling internal waves may reduce gravity current transport

Shoaling internal waves may reduce gravity current transport
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浅滩内波可能会减少重力流传输

DOI:
10.1007/s10652-017-9554-8
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发表时间:
2018
影响因子:
2.2
通讯作者:
Koseff, Jeffrey R.
Koseff, Jeffrey R.
中科院分区:
工程技术3区
文献类型:
--
作者:
Hogg, Charlie A.;Egan, Galen C.;Ouellette, Nicholas T.;Koseff, Jeffrey R.

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沿着斜坡下降的重力流通常是在静止的环境中研究的,尽管在许多地球物理环境中存在重大的外部驱动运动。在这里,我们研究了两层周围水柱的跃层上的界面内波对重力流头部的影响。我们的实验测量表明,较大幅度的内波与重力流相互作用,既减少了重力流的质量传输,也减少了重力流的厚度。这些结果表明,在具有强内波的地球物理环境中,如湖泊和沿海海洋,在估算重力流输运时,应考虑环境内波场。
Gravity currents descending along slopes have typically been studied in quiescent environments, despite the fact that in many geophysical settings there is significant externally driven motion. Here we investigate how the head of a gravity current is influenced by interfacial internal waves at the pycnocline of a two-layer ambient water column. Our experimental measurements show that larger amplitude internal waves, interacting with the gravity current, reduce both the mass transport by the gravity current and its thickness. These results suggest that the ambient internal wave field should be considered when estimating transport by gravity currents in geophysical settings with strong internal waves, such as lakes and the coastal ocean.
DOI: 10.1017/s0022112006003478
发表时间: 2007-01
影响因子: 3.7
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