The University of Southampton
University of Southampton Institutional Repository

Double ridge internal tide interference and its effect on dissipation in Luzon Strait

Double ridge internal tide interference and its effect on dissipation in Luzon Strait
Double ridge internal tide interference and its effect on dissipation in Luzon Strait
Luzon Strait between Taiwan and the Phillipines features two parallel north-south oriented ridges. The barotropic tides that propagate over these ridges cause strong internal waves and dissipation. The energy dissipation mechanisms and the role of the baroclinic wave fields in this dissipation are investigated using numerical simulations with the MITgcm. The model is integrated over two-dimensional configurations along a zonal transect at 20.6±N for a maximum duration of a spring-neap cycle. Nearly all dissipation occurs at the steep ridge crests due to high-mode turbulent lee waves with horizontal scales of several kilometers and vertical scales of hundreds of meters. The spatial structure and timing of the predicted
velocities and dissipation agree with observations, and confirm the existence of these lee waves. The lee wave strength is greatly affected by the internal waves generated at the other ridge. When semidiurnal barotropic tides are dominant, the internal wave beams from both ridges nearly superpose after one surface reflection. The remotely generated internal waves from both ridges are therefore in phase with each other and the barotropic tides at the ridges. The barotropic to baroclinic energy conversion, energy flux divergence, ridge top velocities,
and dissipation are stronger compared to the sum of the single east and west ridge cases. When diurnal tides are dominant, the wave fields are more out of phase, and the conversion, divergence, and the dissipation are less than or equal to the single ridge cases combined.
0022-3670
1337-1356
Buijsman, Maarten C.
aa986b6b-6194-45de-a72c-39a44f205d81
Legg, Sonya
0776c349-d632-4db5-ba26-8348473cddae
Klymak, Jody
441f1acc-8620-4f98-8c11-eb49129ab559
Buijsman, Maarten C.
aa986b6b-6194-45de-a72c-39a44f205d81
Legg, Sonya
0776c349-d632-4db5-ba26-8348473cddae
Klymak, Jody
441f1acc-8620-4f98-8c11-eb49129ab559

Buijsman, Maarten C., Legg, Sonya and Klymak, Jody (2012) Double ridge internal tide interference and its effect on dissipation in Luzon Strait. Journal of Physical Oceanography, 42 (8), 1337-1356. (doi:10.1175/JPO-D-11-0210.1).

Record type: Article

Abstract

Luzon Strait between Taiwan and the Phillipines features two parallel north-south oriented ridges. The barotropic tides that propagate over these ridges cause strong internal waves and dissipation. The energy dissipation mechanisms and the role of the baroclinic wave fields in this dissipation are investigated using numerical simulations with the MITgcm. The model is integrated over two-dimensional configurations along a zonal transect at 20.6±N for a maximum duration of a spring-neap cycle. Nearly all dissipation occurs at the steep ridge crests due to high-mode turbulent lee waves with horizontal scales of several kilometers and vertical scales of hundreds of meters. The spatial structure and timing of the predicted
velocities and dissipation agree with observations, and confirm the existence of these lee waves. The lee wave strength is greatly affected by the internal waves generated at the other ridge. When semidiurnal barotropic tides are dominant, the internal wave beams from both ridges nearly superpose after one surface reflection. The remotely generated internal waves from both ridges are therefore in phase with each other and the barotropic tides at the ridges. The barotropic to baroclinic energy conversion, energy flux divergence, ridge top velocities,
and dissipation are stronger compared to the sum of the single east and west ridge cases. When diurnal tides are dominant, the wave fields are more out of phase, and the conversion, divergence, and the dissipation are less than or equal to the single ridge cases combined.

Text
Buijsman_JPhysOceanogra.pdf - Author's Original
Restricted to Repository staff only

More information

e-pub ahead of print date: 2012
Published date: August 2012
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 340313
URI: https://eprints.soton.ac.uk/id/eprint/340313
ISSN: 0022-3670
PURE UUID: 70e17f20-cecc-4f43-89da-1f6e7a298ce4

Catalogue record

Date deposited: 18 Jun 2012 14:33
Last modified: 04 Nov 2019 20:40

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×