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Near-inertial internal gravity waves in the ocean

TitleNear-inertial internal gravity waves in the ocean
Publication TypeBook Chapter
Year of Publication2016
AuthorsAlford MH, MacKinnon JA, Simmons H.L, Nash J.D
EditorCarlson CA, Giovannoni S.J
Series TitleAnnual Review of Marine Science
PublisherAnnual Reviews
CityPalo Alto
ISBN Number1941-1405<br/>978-0-8243-4508-2
Accession NumberWOS:000368369200006
KeywordsBeaufort Sea; climate; deep-ocean; eddy field; geostrophic flow; internal gravity waves; kinetic-energy; mixed-layer; Mixing; near-inertial waves; north pacific; strong storm; transition layer; turbulence; turbulent dissipation

We review the physics of near-inertial waves (NIWs) in the ocean and the observations, theory, and models that have provided our present knowledge. NIWs appear nearly everywhere in the ocean as a spectral peak at and just above the local inertial period f, and the longest vertical wavelengths can propagate at least hundreds of kilometers toward the equator from their source regions; shorter vertical wavelengths do not travel as far and do not contain as much energy, but lead to turbulent mixing owing to their high shear. NIWs are generated by a variety of mechanisms, including the wind, nonlinear interactions with waves of other frequencies, lee waves over bottom topography, and geostrophic adjustment; the partition among these is not known, although the wind is likely the most important. NIWs likely interact strongly with mesoscale and submesoscale motions, in ways that are just beginning to be understood.

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