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Author LaCasce, J.H.; Escartin, J.; Chassignet, E.P.; Xu, X.
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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ISSN 0022-3670 ISBN Medium
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Call Number COAPS @ user @ Serial 998
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Author Penduff, T.; Barnier, B.; Dewar, W.K.; O'Brien, J.J.
Title Dynamical Response of the Oceanic Eddy Field to the North Atlantic Oscillation: A Model-Data Comparison Type $loc['typeJournal Article']
Year 2004 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.
Volume 34 Issue 12 Pages 2615-2629
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ISSN 0022-3670 ISBN Medium
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Funding Approved $loc['no']
Call Number COAPS @ mfield @ Serial 455
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Author Arruda, W.; Zharkov, V.; Deremble, B.; Nof, D.; Chassignet, E.
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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Funding Approved $loc['no']
Call Number COAPS @ mfield @ Serial 122
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Author Sturges, W.; Bozec, A.
Title A Puzzling Disagreement between Observations and Numerical Models in the Central Gulf of Mexico Type $loc['typeJournal Article']
Year 2013 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.
Volume 43 Issue 12 Pages 2673-2681
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ISSN 0022-3670 ISBN Medium
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Funding Deep-C Approved $loc['no']
Call Number COAPS @ mfield @ Serial 227
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Author Bunge, L.; Clarke, A.J.
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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ISSN 0022-3670 ISBN Medium
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Funding Approved $loc['no']
Call Number COAPS @ mfield @ Serial 156
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Author Yan, Y.; Chassignet, E.P.; Qi, Y.; Dewar, W.K.
Title Freshening of Subsurface Waters in the Northwest Pacific Subtropical Gyre: Observations and Dynamics Type $loc['typeJournal Article']
Year 2013 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.
Volume 43 Issue 12 Pages 2733-2751
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Call Number COAPS @ mfield @ Serial 178
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Author Skiba, A.W.; Zeng, L.; Arbic, B.K.; Müller, M.; Godwin, W.J.
Title On the Resonance and Shelf/Open-Ocean Coupling of the Global Diurnal Tides Type $loc['typeJournal Article']
Year 2013 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.
Volume 43 Issue 7 Pages 1301-1324
Keywords Tides
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Call Number COAPS @ mfield @ Serial 196
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Author Nof, D.; Zharkov, V.; Arruda, W.; Pichevin, T.; Van Gorder, S.; Paldor, N.
Title Comments on “On the Steadiness of Separating Meandering Currents” Type $loc['typeJournal Article']
Year 2012 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.
Volume 42 Issue 8 Pages 1366-1370
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Funding Approved $loc['no']
Call Number COAPS @ mfield @ Serial 243
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Author Nof, D.; Jia, Y.; Chassignet, E.; Bozec, A.
Title Fast Wind-Induced Migration of Leddies in the South China Sea Type $loc['typeJournal Article']
Year 2011 Publication Journal of Physical Oceanography Abbreviated Journal J. Phys. Oceanogr.
Volume 41 Issue 9 Pages 1683-1693
Keywords Eddies; Seas; gulfs; bays; Wind stress; Numerical analysis/modeling; Monsoons
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Call Number COAPS @ mfield @ Serial 324
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Author Kara, A.B.; Hurlburt, H.E.; Rochford, P.A.; O'Brien, J.J.
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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Funding Approved $loc['no']
Call Number COAPS @ mfield @ Serial 462
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