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Hall, Rob A. 
ORCID: https://orcid.org/0000-0002-3665-6322, Alford, Matthew H., Carter, Glenn S., Gregg, Michael C., Lien, Ren-Chieh, Wain, Danielle J. and Zhao, Zhongxiang
(2014)
Transition from partly standing to progressive internal tides in Monterey Submarine Canyon.
Deep-Sea Research Part II: Topical Studies in Oceanography, 104.
pp. 164-173.
ISSN 0967-0645
Abstract
Monterey Submarine Canyon is a large, sinuous canyon off the coast of California, the upper reaches of which were the subject of an internal tide observational program using moored profilers and upward-looking moored ADCPs. The mooring observations measured a near-surface stratification change in the upper canyon, likely caused by a seasonal shift in the prevailing wind that favoured coastal upwelling. This change in near-surface stratification caused a transition in the behaviour of the internal tide in the upper canyon from a partly standing wave during pre-upwelling conditions to a progressive wave during upwelling conditions. Using a numerical model, we present evidence that either a partly standing or a progressive internal tide can be simulated in the canyon, simply by changing the initial stratification conditions in accordance with the observations. The mechanism driving the transition is a dependence of down-canyon (supercritical) internal tide reflection from the canyon floor and walls on the depth of maximum stratification. During pre-upwelling conditions, the main pycnocline extends down to 200 m (below the canyon rim) resulting in increased supercritical reflection of the up-canyon propagating internal tide back down the canyon. The large up-canyon and smaller down-canyon progressive waves are the two components of the partly standing wave. During upwelling conditions, the pycnocline shallows to the upper 50 m of the watercolumn (above the canyon rim) resulting in decreased supercritical reflection and allowing the up-canyon progressive wave to dominate.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | internal waves,internal tides,submarine canyons,usa,california,monterey bay |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017) Faculty of Science > Research Groups > Meteorology, Oceanography and Climate Dynamics (former - to 2017) Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences (former - to 2017) Faculty of Science > Research Groups > Collaborative Centre for Sustainable Use of the Seas |
| Related URLs: | |
| Depositing User: | Pure Connector |
| Date Deposited: | 05 Aug 2013 13:51 |
| Last Modified: | 24 Oct 2022 04:29 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/43108 |
| DOI: | 10.1016/j.dsr2.2013.05.039 |
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