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Filtering by: Creator Weissman, D. E. Remove constraint Creator: Weissman, D. E. Decade 2010-2019 Remove constraint Decade: 2010-2019 Has journal sim Journal of Physical Oceanography Remove constraint Has journal sim: Journal of Physical Oceanography

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  • Surface Wave Effects on High-Frequency Currents over a Shelf Edge Bank

    Creator:
    Wijesekera, H. W., Wang, D. W., Teague, W. J., Jarosz, E., Rogers, W. E., Fribance, D. B., and Moum, J. N.
    Abstract:
    Several acoustic Doppler current profilers and vertical strings of temperature, conductivity, and pressure sensors, deployed on and around the East Flower Garden Bank (EFGB), were used to examine surface wave effects on high-frequency flows over the bank and to quantify spatial and temporal characteristic of these high-frequency flows. The EFGB,...
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    Currents over a Shelf Edge Bank H. W. WIJESEKERA, D. W. WANG, W. J. TEAGUE, E. JAROSZ, AND W. E. ROGERS

  • Turbulent Kinetic Energy Dissipation in Barrow Canyon

    Creator:
    Shroyer, E. L.
    Abstract:
    Pacific Water flows across the shallow Chukchi Sea before reaching the Arctic Ocean, where it is a source of heat, freshwater, nutrients, and carbon. A substantial portion of Pacific Water is routed through Barrow Canyon, located in the northeast corner of the Chukchi. Barrow Canyon is a region of complex...
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    ) Temperature, (b) salinity, (c) potential density, (d) eastward perturbation velocity, (e) eastward depth

  • Time-Variable Refraction of the Internal Tide at the Hawaiian Ridge

    Creator:
    Zaron, Edward D. and Egbert, Gary D.
    Abstract:
    The interaction of the dominant semidiurnal M₂ internal tide with the large-scale subtidal flow is examined in an ocean model by propagating the tide through an ensemble of background fields in a domain centered on the Hawaiian Ridge. The background fields are taken from the Simple Ocean Data Assimilation (SODA)...
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    Ridge Time-Variable Refraction of the Internal Tide at the Hawaiian Ridge Zaron, Edward D., Gary D

  • Oceanic Turbulent Energy Budget using Large-Eddy Simulation of a Wind Event during DYNAMO

    Creator:
    Hoecker-Martínez, Martin S., Smyth, William D., and Skyllingstad, Eric D.
    Abstract:
    The dominant processes governing ocean mixing during an active phase of the Madden–Julian oscillation are identified. Air–sea fluxes and upper-ocean currents and hydrography, measured aboard the R/V Revelle during boreal fall 2011 in the Indian Ocean at 0°, 80.5°E, are integrated by means of a large-eddy simulation (LES) to infer...
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    –2400, doi:10.1175/ 2010JPO4403.1. Lau, W. K. M., and D. E. Waliser, Eds., 2012: Intraseasonal Vari

  • Measurements of Form and Frictional Drags over a Rough Topographic Bank

    Creator:
    Wijesekera, H. W., Jarosz, E., Teague, W. J., Wang, D. W., Fribance, D. B., Moum, J. N., and Warner, S. J.
    Abstract:
    Pressure differences across topography generate a form drag that opposes the flow in the water column, and viscous and pressure forces acting on roughness elements of the topographic surface generate a frictional drag on the bottom. Form drag and bottom roughness lengths were estimated over the East Flower Garden Bank...
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    ., Jarosz, E., Teague, W. J., Wang, D. W., Fribance, D. B., Moum, J. N., & Warner, S. J. (2014

  • Mixing in a Moderately Sheared Salt-Fingering Layer

    Creator:
    Smyth, W. D. and Kimura, S.
    Abstract:
    Mixing due to sheared salt fingers is studied by means of direct numerical simulations (DNS) of a double-diffusively unstable shear layer. The focus is on the “moderate shear” case, where shear is strong enough to produce Kelvin–Helmholtz (KH) instability but not strong enough to produce the subharmonic pairing instability. This...
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    1024 C 0.18 2.0 0.10 0.04 512 3 64 3 1024 D 0.18 1.6 0.10 0.04 512 3 64 3 1024 E 0.25 1.6 0.10 0.04 512

  • Effects of Ambient Turbulence on Interleaving at a Baroclinic Front

    Creator:
    Smyth, William D. and Ruddick, Barry
    Abstract:
    In this paper the authors investigate the action of ambient turbulence on thermohaline interleaving using both theory and numerical calculations in combination with observations from Meddy Sharon and the Faroe Front. The highly simplified models of ambient turbulence used previously are improved upon by allowing turbulent diffusivities of momentum, heat,...
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    , OR 97331. E-mail: smyth@coas.oregonstate.edu APRIL 2010 S M Y T H A N D R U D D I C K 685 DOI

  • Narrowband Oscillations in the Upper Equatorial Ocean. Part I: Interpretation as Shear Instabilities

    Creator:
    Moum, J. N., Nash, J. D., and Smyth, W. D.
    Abstract:
    Extended measurements of temperature fluctuations that include the turbulence wavenumber band have now been made using rapidly sampled fast thermistors at multiple depths above the core of the Equatorial Undercurrent on the Tropical Atmosphere Ocean (TAO) mooring at 0°, 140°W. These measurements include the signature of narrowband oscillations as well...
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    , (d) meridional velocity, and (e) squared shear. The xpod depths are denoted by the short horizontal

  • Narrowband Oscillations in the Upper Equatorial Ocean. Part II: Properties of Shear Instabilities

    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...
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    frequency, (d) phase velocity cp, (e) critical-level depth zc, and (f) wavelength l. 418 J O U R N A L O F

  • The Spindown of Bottom-Trapped Plumes

    Creator:
    Matano, Ricardo P. and Palma, Elbio D.
    Abstract:
    This note considers the decay of a bottom-trapped freshwater plume after the causative freshwater inflow has ceased. It is shown that shortly after the low-density inflow stops, the barotropic pressure field that it created radiates away and the ocean circulation becomes controlled by baroclinic pressure gradients generated by the remnants...
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    , Corvallis, OR 97331-5503. E-mail: rmatano@coas.oregonstate.edu JULY 2010 N O T E S A N D C O R R E S P O N