Index Catalog // ScholarsArchive@OSU

Creator:: Levine, Murray D.
Abstract:: The Garrett–Munk (GM) spectrum continues to be a useful description of the oceanic internal wave field. However, there are several inconsistencies and ambiguities that make it difficult to use in comparing internal wave fields at different latitudes, stratifications, and water depths. A modified spectral formulation is presented that treats three...
Resource Type:: Article
Full Text:: . Murray D. Levine, 104 Ocean Admin. Bldg., Oregon State University, Corvallis, OR 97331. E-mail: levine

Creator:: Matano, R. P. and Palma, E. D.
Abstract:: This article presents a semianalytic method to investigate the properties of energy transmission across bottom topography by barotropic Rossby waves. The method is first used to revisit the analytical estimates derived from wave-matching techniques and Wentzel–Kramers–Brillouin (WKB) approximations. The comparison between the semianalytic method and WKB indicates that the results...
Resource Type:: Article
Full Text:: . MATANO College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon E. D

Creator:: Moum, J. N., Farmer, D. M., Shroyer, E. L., Smyth, W. D., and Armi, L.
Abstract:: A single nonlinear internal wave tracked more than 100 wavelengths across Oregon’s continental shelf over a 12-h period exhibited nearly constant wave speed, c = 0.75 m s⁻¹, and amplitude, a = 15 m. The wavelength L gradually decreased from 220 m in 170-m water depth to 60 m in...
Resource Type:: Article
Full Text:: , University of Rhode Island, Kingston, Rhode Island E. L. SHROYER AND W. D. SMYTH College of Oceanic and

Creator:: Zaron, Edward D. and Egbert, Gary D.
Abstract:: The generalized inverse of a regional model is used to estimate barotropic tidal dissipation along the Hawaiian Ridge. The model, based on the linear shallow-water equations, incorporates parameterizations for the dissipation of energy via friction in the bottom boundary layer and form drag due to internal waves generated at topographic...
Resource Type:: Article
Full Text:: University, Corvallis, OR 97331. E-mail: ezaron@coas.oregonstate.edu JUNE 2006 Z A R O N A N D E G B E R T

Creator:: Moum, J. N., Klymak, J. M., Nash, J. D., Perlin, A., and Smyth, W. D.
Abstract:: Winter stratification on Oregon’s continental shelf often produces a near-bottom layer of dense fluid that acts as an internal waveguide upon which nonlinear internal waves propagate. Shipboard profiling and bottom lander observations capture disturbances that exhibit properties of internal solitary waves, bores, and gravity currents. Wavelike pulses are highly turbulent...
Resource Type:: Article
Full Text:: University of Victoria, Victoria, British Columbia, Canada J. D. NASH, A. PERLIN, AND W. D. SMYTH College

Creator:: Smyth, William D. and Kimura, Satoshi
Abstract:: The linear stability of a double-diffusively stratified, inflectional shear flow is investigated. Double-diffusive stratification has little effect on shear instability except when the density ratio R[subscript]ρ is close to unity. Double-diffusive instabilities have significant growth rates and can represent the fastest-growing mode even in the presence of inflectionally unstable shear...
Resource Type:: Article
Full Text:: , Corvallis, OR 97331-5503. E-mail: smyth@coas.oregonstate.edu JUNE 2007 S M Y T H A N D K I M U R A 1551

Creator:: Smyth, W. D., Moum, J. N., and Caldwell, D. R.
Abstract:: The time evolution of mixing in turbulent overturns is investigated using a combination of direct numerical simulations (DNS) and microstructure profiles obtained during two field experiments. The focus is on the flux coefficient Γ, the ratio of the turbulent buoyancy flux to the turbulent kinetic energy dissipation rate ϵ. In...
Resource Type:: Article
Full Text:: kinetic energy evolves in accordance with d 1 u9u9 5 S 2 B 2 ^e & , (27)i i D7 8dt 2 D in which S 5 2

Creator:: Skyllingstad, Eric D., Smyth, W. D., and Crawford, G. B.
Abstract:: The role of resonant wind forcing in the ocean boundary layer was examined using an ocean large-eddy simulation (LES) model. The model simulates turbulent flow in a box, measuring ~100–300 m on a side, whose top coincides with the ocean surface. Horizontal boundary conditions are periodic, and time-dependent wind forcing...
Resource Type:: Article
Full Text:: ., Large et 1 AUGUST 2000 1867S K Y L L I N G S T A D E T A L . FIG. 1. Schematic showing main pathways

Creator:: Smyth, W. D., Moum, J. N., and Nash, J. D.
Abstract:: Narrowband oscillations observed in the upper equatorial Pacific are interpreted in terms of a random ensemble of shear instability events. Linear perturbation analysis is applied to hourly averaged profiles of velocity and density over a 54-day interval, yielding a total of 337 unstable modes. Composite profiles of mean states and...
Resource Type:: Article
Full Text:: frequency, (d) phase velocity cp, (e) critical-level depth zc, and (f) wavelength l. 418 J O U R N A L O F

Creator:: Smyth, W. D., Nash, J. D., and Moum, J. N.
Abstract:: Direct numerical simulations are used to compare turbulent diffusivities of heat and salt during the growth and collapse of Kelvin–Helmholtz billows. The ratio of diffusivities is obtained as a function of buoyancy Reynolds number Re[subscript]b and of the density ratio R[subscript]ρ (the ratio of the contributions of heat and salt...
Resource Type:: Article
Full Text:: ) using (11), which under the Batchelor scaling becomes ��t� � � 0 2 �0 � f��e ��e�� 2t d��, �23

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