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Impact of Parameterized Internal Wave Drag on the Semidiurnal Energy Balance in a Global Ocean Circulation Model

Title: Impact of Parameterized Internal Wave Drag on the Semidiurnal Energy Balance in a Global Ocean Circulation Model.
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Name(s): Buijsman, Maarten C., author
Ansong, Joseph K., author
Arbic, Brian K., author
Richman, James G., author
Shriver, Jay F., author
Timko, Patrick G., author
Wallcraft, Alan J., author
Whalen, Caitlin B., author
Zhao, ZhongXiang, author
Type of Resource: text
Genre: Text
Date Issued: 2016-05
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The effects of a parameterized linear internal wave drag on the semidiurnal barotropic and baroclinic energetics of a realistically forced, three-dimensional global ocean model are analyzed. Although the main purpose of the parameterization is to improve the surface tides, it also influences the internal tides. The relatively coarse resolution of the model of similar to 8 km only permits the generation and propagation of the first three vertical modes. Hence, this wave drag parameterization represents the energy conversion to and the subsequent breaking of the unresolved high modes. The total tidal energy input and the spatial distribution of the barotropic energy loss agree with the Ocean Topography Experiment (TOPEX)/Poseidon (TPXO) tidal inversion model. The wave drag overestimates the high-mode conversion at ocean ridges as measured against regional high-resolution models. The wave drag also damps the low-mode internal tides as they propagate away from their generation sites. Hence, it can be considered a scattering parameterization, causing more than 50% of the deep-water dissipation of the internal tides. In the near field, most of the baroclinic dissipation is attributed to viscous and numerical dissipation. The far-field decay of the simulated internal tides is in agreement with satellite altimetry and falls within the broad range of Argo-inferred dissipation rates. In the simulation, about 12% of the semidiurnal internal tide energy generated in deep water reaches the continental margins.
Identifier: FSU_libsubv1_wos_000376153100001 (IID), 10.1175/JPO-D-15-0074.1 (DOI)
Keywords: continental-slope, deep-ocean, general-circulation, luzon strait, numerical-model, philippine sea, ridge, tidal dissipation, tides, topography
Publication Note: The publisher’s version of record is available at http://www.dx.doi.org/10.1175/JPO-D-15-0074.1
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000376153100001
Owner Institution: FSU
Is Part Of: Journal of Physical Oceanography.
0022-3670
Issue: iss. 5, vol. 46

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Buijsman, M. C., Ansong, J. K., Arbic, B. K., Richman, J. G., Shriver, J. F., Timko, P. G., … Zhao, Z. X. (2016). Impact of Parameterized Internal Wave Drag on the Semidiurnal Energy Balance in a Global Ocean Circulation Model. Journal Of Physical Oceanography. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000376153100001