On the magnitude of canyon-induced mixing

Nazarian, Robert H.; Burns, Christian M.; Legg, Sonya; Buijsman, Maarten C.; Kaur, Harpreet; Arbic, Brian K.

doi:10.1029/2021JC017671

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On the magnitude of canyon-induced mixing

2021
By Nazarian, Robert H. ; Burns, Christian M. ; Legg, Sonya ; ...
Source: Journal of Geophysical Research: Oceans , 126 (11), e2021JC017671

[PDF-2.09 MB]

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Details:

Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Nazarian, Robert H. ; Burns, Christian M. ; Legg, Sonya ; Buijsman, Maarten C. ; Kaur, Harpreet ; ... More +

Nazarian, Robert H. ; Burns, Christian M. ; Legg, Sonya ; Buijsman, Maarten C. ; Kaur, Harpreet ; Arbic, Brian K. Less -
NOAA Program & Office:

CIMES (Cooperative Institute for Modeling the Earth System) ; OAR (Oceanic and Atmospheric Research)

CIMES (Cooperative Institute for Modeling the Earth System) ; OAR (Oceanic and Atmospheric Research) Less -
Description:

The location of mixing due to internal tides is important for both the ocean circulation as well as local biogeochemical processes. Numerous observations and modeling studies have shown that submarine canyons may be regions of enhanced internal tide-driven mixing, but there has not yet been a systematic study of all submarine canyons resolved in bathymetric datasets. Here, we parameterize the internal tide-driven dissipation from a suite of simulations and pair this with a global high-resolution, internal tide-resolving model and bathymetric dataset to estimate the internal-tide-driven dissipation that occurs in all documented submarine canyons. We find that submarine canyons dissipate a significant fraction of the incoming internal tide's energy, which is consistent with observations. When globally integrated, submarine canyons are responsible for dissipating 30.8–75.3 GW, or 3.2%–7.8% of the energy input into the M2-frequency internal tides. This percentage of the internal tide energy that is dissipated in submarine canyons is comparable to or larger than previous calculations using extrapolations from observations of single canyons.
Keywords:

[+]

Tides Topography
Source:

Journal of Geophysical Research: Oceans , 126 (11), e2021JC017671
DOI:

https://doi.org/10.1029/2021JC017671
Document Type:

Journal Article
Funding:

Grant no. NA18OAR4320123 ; Grant no. NA18OAR432012

Grant no. NA18OAR4320123 ; Grant no. NA18OAR432012 Less -
Rights Information:

CC BY-NC-ND
Compliance:

Submitted
Main Document Checksum:

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urn:sha256:497cf9f7f8f34cc35347fa72d1eda1a8cef1c25e1a2222dee2084604b4e6a976
Download URL:

https://repository.library.noaa.gov/view/noaa/43150/noaa_43150_DS1.pdf
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