The impact of internal tide mixing parameterizations in an eddy-permitting model of the Arctic Ocean
department or school: Science, Faculty of
department or school: Earth, Ocean and Atmospheric Sciences, Department of
data provider: DSpace
degree campus: UBCV
creator: Epstein, Jacquie-Lee
issued: 2018-04-19T18:53:27Z
issued: 2018
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: In this study we consider the impact of enhanced ocean mixing due to the breaking of internal tides on model state in an eddy-permitting numerical model of the Arctic Ocean. We compare the impact of two enhanced tidal mixing parameterizations each with different vertical dissipation profiles based on Polzin [2009] and Jayne and St Laurent [2001], respectively, in contrast to a control run without the additional tidal mixing parameterization. We find that the model runs with implementations of the two internal tide mixing parameterizations have varied and in some instances, large differences in important model variables indicating that the inclusion of internal tide mixing in a numerical model of the Arctic Ocean will require careful consideration.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/65516
note: The Impact of Internal Tide MixingParameterizations in anEddy-Permitting Model of the ArcticOceanbyJacquie-Lee EpsteinB.Sc., The University of Alberta, 2015A THESIS SUBMITTED IN PARTIAL FULFILLMENT OFTHE REQUIREMENTS FOR THE DEGREE OFMASTER OF SCIENCEinThe Faculty of Graduate and Postdoctoral Studies(Oceanography)THE UNIVERSITY OF BRITISH COLUMBIA(Vancouver)April 2018c Jacquie-Lee Epstein 2018AbstractThis study considers the impact of enhanced ocean mixing due to the breaking of internal tideson model state in an eddy-permitting numerical model of the Arctic Ocean. The impact of twoenhanced tidal mixing parameterizations each with di↵erent vertical dissipation profiles based onPolzin [2009] and Jayne and St Laurent [2001], respectively, are compared in contrast to a controlrun without the additional tidal mixing parameterization. This study finds that the model runswith implementations of the two internal tide mixing parameterizations have varied and in someinstances, large di↵erences in important model variables indicating that the inclusion of internaltide mixing in a numerical model of the Arctic Ocean will require careful consideration.iiLay SummaryThis study examines the representation of internal tide mixing in a model of the Atlanticand Arctic Oceans and the resulting impact on the Arctic Ocean. Internal tide mixing leads tosignificant changes in the Arctic Ocean model state such as: decreased sea ice cover and surfacecirculation, non-trivial changes to the Arctic Ocean heat budget, redistribution of freshwater in thebasins, and important changes to the temperature, salinity and stratification fields throughout theArctic Ocean. Two di↵erent representations of internal tide mixing were examined from Jayne andSt Laurent [2001] and Polzin [2009] and this study finds that the more physically based internaltide mixing estimation from Polzin [2009] is likely a more realistic representation of the internaltide mixing field in the Arctic Ocean.iiiPrefaceThe results i…
has type: Thesis/Dissertation
date issued: 2018-05
is shown at: 10.14288/1.0365809
language: eng
degree discipline: Oceanography
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/65516