Response of the deep ocean internal wave field to traveling midlatitude storms as observed in long-term current measurements

1999 ◽  
Vol 104 (C5) ◽  
pp. 10981-10989 ◽  
Author(s):  
Yoshihiro Niwa ◽  
Toshiyuki Hibiya
Keyword(s):  
Internal Wave ◽  
Wave Field ◽  
Deep Ocean ◽  
Internal Wave Field ◽  
Midlatitude Storms

scholarly journals Eikonal Calculations for Energy Transfer in the Deep-Ocean Internal Wave Field near Mixing Hotspots

2017 ◽  
Vol 47 (1) ◽  
pp. 199-210 ◽  
Author(s):  
Takashi Ijichi ◽  
Toshiyuki Hibiya
Keyword(s):  
Energy Transfer ◽  
Internal Wave ◽  
Wave Field ◽  
Vertical Velocity ◽  
Deep Ocean ◽  
Wave Spectra ◽  
Scale Separation ◽  
Transfer Rates ◽  
Calculated Energy ◽  
Internal Wave Field

AbstractIn the proximity of mixing hotspots in the deep ocean, the observed internal wave spectra are usually distorted from the Garrett–Munk (GM) spectrum and are characterized by the high energy level E as well as a shear–strain ratio Rω quite different from that of the GM spectrum. On the basis of the eikonal theoretical model, Ijichi and Hibiya (IH) recently proposed the revised finescale parameterization of turbulent dissipation rates in the distorted internal wave field, although the vertical velocity associated with background internal waves and the strict WKB scale separation, for example, were not taken into account. To see the effects of such simplifying assumptions on the revised parameterization, this study carries out a series of eikonal calculations for energy transfer through various internal wave spectra distorted from the GM. Although the background vertical velocity and the strict WKB scale separation somewhat affect the calculated energy transfer rates, their parameter dependence is confirmed as expected; the calculated energy transfer rates ε follow the basic scaling ε ∝ E2N2f with the local buoyancy frequency N and the local inertial frequency f and exhibit strong Rω dependence quite similar to that predicted by IH.

scholarly journals Can barotropic tide–eddy interactions excite internal waves?

2013 ◽  
Vol 721 ◽  
pp. 1-27 ◽  
Author(s):  
M.-P. Lelong ◽  
E. Kunze
Keyword(s):  
Internal Wave ◽  
Wave Field ◽  
Internal Waves ◽  
Tidal Current ◽  
Deep Ocean ◽  
Wave Excitation ◽  
Barotropic Tide ◽  
Internal Wave Field ◽  
Flow Components ◽  
Internal Wave Generation

AbstractThe interaction of barotropic tidal currents and baroclinic geostrophic eddies is considered theoretically and numerically to determine whether energy can be transferred to an internal wave field by this process. The eddy field evolves independently of the tide, suggesting that it acts catalytically in facilitating energy transfer from the barotropic tide to the internal wave field, without exchanging energy with the other flow components. The interaction is identically zero and no waves are generated when the barotropic tidal current is horizontally uniform. Optimal internal wave generation occurs when the scales of tide and eddy fields satisfy resonant conditions. The most efficient generation is found if the tidal current horizontal scale is comparable to that of the eddies, with a weak maximum when the scales differ by a factor of two. Thus, this process is not an effective mechanism for internal wave excitation in the deep ocean, where tidal current scales are much larger than those of eddies, but it may provide an additional source of internal waves in coastal areas where horizontal modulation of the tide by topography can be significant.

scholarly journals The internal wave field in Sau reservoir: Observation and modeling of a third vertical mode

2005 ◽  
Vol 50 (4) ◽  
pp. 1326-1333 ◽  
Author(s):  
Javier Vidal ◽  
Xavier Casamitjana ◽  
Jordi Colomer ◽  
Teresa Serra
Keyword(s):  
Internal Wave ◽  
Wave Field ◽  
Vertical Mode ◽  
Internal Wave Field
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