Mixing by Oceanic Lee Waves

Legg, Sonya

doi:10.1146/annurev-fluid-051220-043904

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Mixing by Oceanic Lee Waves

2021
By Legg, Sonya
Source: Annual Review of Fluid Mechanics, 53, 173-201

[PDF-3.00 MB]

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Journal Title:

Annual Review of Fluid Mechanics
Personal Author:

Legg, Sonya
NOAA Program & Office:

CIMES (Cooperative Institute for Modeling the Earth System)
Description:

Oceanic lee waves are generated in the deep stratified ocean by the flow of ocean currents over sea floor topography, and when they break, they can lead to mixing in the stably stratified ocean interior. While the theory of linear lee waves is well established, the nonlinear mechanisms leading to mixing are still under investigation. Tidally driven lee waves have long been observed in the ocean, along with associated mixing, but observations of lee waves forced by geostrophic eddies are relatively sparse and largely indirect. Parameterizations of the mixing due to ocean lee waves are now being developed and implemented in ocean climate models. This review summarizes current theory and observations of lee wave generation and mixing driven by lee wave breaking, distinguishing between steady and tidally oscillating forcing. The existing parameterizations of lee wave-driven mixing informed by theory and observations are outlined, and the impacts of the parameterized lee wave-driven mixing on simulations of large-scale ocean circulation are summarized.
Keywords:

[+]

General-circulation Internal Waves Kaena Ridge Mixing Oceanic Lee Waves Overturning Circulation Parameterization Small-scale Southern-ocean Stratified Flow Stratified Turbulence Tidal Flow Turbulent Dissipation Western Boundary
Source:

Annual Review of Fluid Mechanics, 53, 173-201
DOI:

https://doi.org/10.1146/annurev-fluid-051220-043904
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4320123
Rights Information:

Accepted Manuscript
Compliance:

Submitted
Main Document Checksum:

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urn:sha256:8948b3fdc23b8e9141af04bea85346942959f360a31dabcbd4172839b5038cb0
Download URL:

https://repository.library.noaa.gov/view/noaa/30703/noaa_30703_DS1.pdf
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Mixing by Oceanic Lee Waves

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