Enhanced Energy Dissipation in the Equatorial Pycnocline by Wind-Induced Internal Wave Activity

Natarov, A.; Richards, K. J.

doi:10.1029/2019JC015228

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Enhanced Energy Dissipation in the Equatorial Pycnocline by Wind-Induced Internal Wave Activity

2019
By Natarov, A. ; Richards, K. J.
Source: Journal of Geophysical Research: Oceans, 124, 6200– 6217

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Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Natarov, A. ; Richards, K. J.

Natarov, A. ; Richards, K. J. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

Numerical experiments show that in a zonally symmetric model of a tropical ocean forced only by transient winds both inertia-gravity wave activity and the energy dissipation rate have a pronounced maximum in the pycnocline close to the equator regardless of the latitudinal distribution of the energy input into the ocean's mixed layer. We consider a number of factors that determine the spatial distribution of mixing and find that equatorial enhancement is due to a combination of three factors: a stronger superinertial component of the wind forcing close to the equator, wave action convergence at turning latitudes for equatorially trapped waves, and nonlinear wave-wave interactions between equatorially trapped waves. The most important factor is wave action convergence at turning latitudes.
Keywords:

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Energy Dissipation Waves Wind
Source:

Journal of Geophysical Research: Oceans, 124, 6200– 6217
DOI:

https://doi.org/10.1029/2019JC015228
Document Type:

Journal Article
Funding:

Grant no. NA17OAR4310252
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Submitted
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urn:sha256:c671c21a0343e218487d46119300fc8c6341d51d6954cd29411edcb93a460630
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https://repository.library.noaa.gov/view/noaa/32650/noaa_32650_DS1.pdf
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Enhanced Energy Dissipation in the Equatorial Pycnocline by Wind-Induced Internal Wave Activity

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