Suppression of internal waves by thermohaline staircases
Suppression of internal waves by thermohaline staircases
复制标题
温盐阶梯对内波的抑制
DOI:
10.1017/jfm.2020.563
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发表时间:
2020
影响因子:
3.7
通讯作者:
Radko, Timour
中科院分区:
文献类型:
--
作者:
Radko, Timour
This study attempts to quantify and explain the systematic weakening of internal gravity waves in fingering and diffusive thermohaline staircases. The interaction between waves and staircases is explored using a combination of direct numerical simulations (DNS) and an asymptotic multiscale model. The multiscale theory makes it possible to express the wave decay rate is only weakly dependent on the thickness of layers in the staircase, the overall density ratio and the diffusivity ratio. The proposed physical mechanism of attenuation emphasizes the significance of eddy diffusion of temperature and salinity, whereas eddy viscosity plays a secondary role in damping internal waves. The asymptotic model is successfully validated by the DNS performed in numerically accessible regimes. We also discuss potential implications of staircase-induced suppression for diapycnal mixing by overturning internal waves in the ocean.
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影响因子:
3.7
作者:
T. Radko
通讯作者:
T. Radko
影响因子:
2.7
作者:
Scott Wunsch
通讯作者:
Scott Wunsch
影响因子:
3.5
作者:
R. Pinkel
通讯作者:
R. Pinkel
影响因子:
3.7
作者:
Radko, Timour
通讯作者:
Radko, Timour
影响因子:
0.5
作者:
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