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Author Ansong, J.K.; Arbic, B.K.; Simmons, H.L.; Alford, M.H.; Buijsman, M.C.; Timko, P.G.; Richman, J.G.; Shriver, J.F.; Wallcraft, A.J. url  doi
openurl 
  Title Geographical Distribution of Diurnal and Semidiurnal Parametric Subharmonic Instability in a Global Ocean Circulation Model Type $loc['typeJournal Article']
  Year 2018 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 48 Issue 6 Pages 1409-1431  
  Keywords Baroclinic flows; Internal waves; Nonlinear dynamics; Ocean dynamics; Baroclinic models; Ocean models  
  Abstract The evidence for, baroclinic energetics of, and geographic distribution of parametric subharmonic instability (PSI) arising from both diurnal and semidiurnal tides in a global ocean general circulation model is investigated using 1/12.5° and 1/25° simulations that are forced by both atmospheric analysis fields and the astronomical tidal potential. The paper examines whether PSI occurs in the model, and whether it accounts for a significant fraction of the tidal baroclinic energy loss. Using energy transfer calculations and bispectral analyses, evidence is found for PSI around the critical latitudes of the tides. The intensity of both diurnal and semidiurnal PSI in the simulations is greatest in the upper ocean, consistent with previous results from idealized simulations, and quickly drops off about 5° from the critical latitudes. The sign of energy transfer depends on location; the transfer is positive (from the tides to subharmonic waves) in some locations and negative in others. The net globally integrated energy transfer is positive in all simulations and is 0.5%�10% of the amount of energy required to close the baroclinic energy budget in the model. The net amount of energy transfer is about an order of magnitude larger in the 1/25° semidiurnal simulation than the 1/12.5° one, implying the dependence of the rate of energy transfer on model resolution.  
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  ISSN 0022-3670 ISBN Medium  
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  Call Number COAPS @ user @ Serial 976  
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Author Arruda, W.; Zharkov, V.; Deremble, B.; Nof, D.; Chassignet, E. url  doi
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  Title A New Model of Current Retroflection Applied to the Westward Protrusion of the Agulhas Current Type $loc['typeJournal Article']
  Year 2014 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 44 Issue 12 Pages 3118-3138  
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  ISSN 0022-3670 ISBN Medium  
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  Call Number COAPS @ mfield @ Serial 122  
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Author Bourassa, M.A.; Vincent, D.G.; Wood, W.L. url  doi
openurl 
  Title A Sea State Parameterization with Nonarbitrary Wave Age Applicable to Low and Moderate Wind Speeds Type $loc['typeJournal Article']
  Year 2001 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 31 Issue 10 Pages 2840-2851  
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  Call Number COAPS @ mfield @ Serial 512  
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Author Buijsman, M.C.; Ansong, J.K.; Arbic, B.K.; Richman, J.G.; Shriver, J.F.; Timko, P.G.; Wallcraft, A.J.; Whalen, C.B.; Zhao, Z.X. url  doi
openurl 
  Title Impact of Parameterized Internal Wave Drag on the Semidiurnal Energy Balance in a Global Ocean Circulation Model Type $loc['typeJournal Article']
  Year 2016 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 46 Issue 5 Pages 1399-1419  
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  Call Number COAPS @ mfield @ Serial 31  
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Author Bunge, L.; Clarke, A.J. url  doi
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  Title On the Warm Water Volume and Its Changing Relationship with ENSO Type $loc['typeJournal Article']
  Year 2014 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 44 Issue 5 Pages 1372-1385  
  Keywords Physical Meteorology and Climatology; Climate variability; ENSO; Observational techniques and algorithms; Climate records; Variability; Decadal variability; Interannual variability  
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  Call Number COAPS @ mfield @ Serial 156  
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Author Chassignet, E.P.; Xu, X. url  doi
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  Title Impact of Horizontal Resolution (1/12° to 1/50°) on Gulf Stream Separation, Penetration, and Variability Type $loc['typeJournal Article']
  Year 2017 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 47 Issue 8 Pages 1999-2021  
  Keywords Ocean; Boundary currents; Eddies; Mesoscale processes; Ocean circulation; Ocean dynamics  
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  Call Number COAPS @ mfield @ Serial 17  
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Author Kara, A.B.; Hurlburt, H.E.; Rochford, P.A.; O'Brien, J.J. url  doi
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  Title The Impact of Water Turbidity on Interannual Sea Surface Temperature Simulations in a Layered Global Ocean Model* Type $loc['typeJournal Article']
  Year 2004 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 34 Issue 2 Pages 345-359  
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  Call Number COAPS @ mfield @ Serial 462  
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Author LaCasce, J.H.; Escartin, J.; Chassignet, E.P.; Xu, X. url  doi
openurl 
  Title Jet instability over smooth, corrugated and realistic bathymetry Type $loc['typeJournal Article']
  Year 2018 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
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  Abstract The stability of a horizontally- and vertically-sheared surface jet is examined, with a focus on the vertical structure of the resultant eddies. Over a flat bottom, the instability is mixed baroclinic/barotropic, producing strong eddies at depth which are characteristically shifted downstream relative to the surface eddies. Baroclinic instability is suppressed over a large slope for retrograde jets (with a flow anti-parallel to topographic wave propagation), and to a lesser extent for prograde jets (with flow parallel to topographic wave propagation), as seen previously. In such cases, barotropic (lateral) instability dominates if the jet is sufficiently narrow. This yields surface eddies whose size is independent of the slope but proportional to the jet width. Deep eddies still form, forced by interfacial motion associated with the surface eddies, but they are weaker than under baroclinic instability and are vertically aligned with the surface eddies. A sinusoidal ridge acts similarly, suppressing baroclinic instability and favoring lateral instability in the upper layer.

A ridge with a 1 km wavelength and an amplitude of roughly 10 m is sufficient to suppress baroclinic instability. Surveys of bottom roughness from bathymetry acquired with shipboard multibeam echosounding reveal that such heights are common, beneath the Kuroshio, the Antarctic Circumpolar Current and, to a lesser extent, the Gulf Stream. Consistent with this, vorticity and velocity cross sections from a 1/50° HYCOM simulation suggest that Gulf Stream eddies are vertically aligned, as in the linear stability calculations with strong topography. Thus lateral instability may be more common than previously thought, due to topography hindering vertical energy transfer.
 
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  Call Number COAPS @ user @ Serial 998  
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Author Leonardi, A.P.; Morey, S.L.; O'Brien, J.J. url  doi
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  Title Interannual Variability in the Eastern Subtropical North Pacific Ocean Type $loc['typeJournal Article']
  Year 2002 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 32 Issue 6 Pages 1824-1837  
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  Funding NASA, ONR Approved $loc['no']  
  Call Number COAPS @ mfield @ Serial 496  
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Author Meyers, S.D.; Liu, M.; O'Brien, J.J.; Johnson, M.A.; Spiesberger, J.L. url  doi
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  Title Interdecadal Variability in a Numerical Model of the Northeast Pacific Ocean: 1970-89 Type $loc['typeJournal Article']
  Year 1996 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.  
  Volume 26 Issue 12 Pages 2635-2652  
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  Call Number COAPS @ mfield @ Serial 545  
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