Index Catalog // ScholarsArchive@OSU

Creator:: Moum, J. N., Gregg, M. C., Lien, R. C., and Carr, M. E.
Abstract:: Almost 1000 microstructure profiles from two separate groups on two separate ships using different instrumentation, signal processing, and calibration procedures were compared for a 3.5-day time period at 0°, 140°W and within 11 km of each other. Systematic bias in the estimates of ϵ is less than a factor of...
Resource Type:: Article

Creator:: Caldwell, D. R., Lien, R-C., Moum, J. N., and Gregg, M. C.
Abstract:: Although the process of restratification of the ocean surface layer at the equator following nighttime convection is similar in many ways to the process at midlatitudes, there are important differences. A composite day calculated from 15 days of consistent conditions at 140°W on the equator was compared with midlatitude observations...
Resource Type:: Article
Full Text:: University, Corvallis, Oregon M. C. GREGG Applied Physics Laboratory, University of Washington, Seattle

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,...
Resource Type:: Article
Full Text:: Currents over a Shelf Edge Bank H. W. WIJESEKERA, D. W. WANG, W. J. TEAGUE, E. JAROSZ, AND W. E. ROGERS

Creator:: Smyth, W. D. and Moum, J. N.
Abstract:: Deep cycle mixing in the cold tongue of the equatorial Pacific Ocean is associated with a mean flow regime in which the gradient Richardson number Ri (a ratio of stratification to shear that affects the evolution of turbulence) fluctuates about a critical value near 1/4. This is the state of...
Full Text:: equatorial Pacific Ocean Smyth, W. D., and J. N. Moum (2013), Marginal instability and deep cycle

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...
Resource Type:: Article
Full Text:: Topographic Bank Measurements of Form and Frictional Drags over a Rough Topographic Bank Wijesekera, H. W

Creator:: Smyth, W. D., Zavialov, P. O., and Moum, J. N.
Abstract:: Measurements of velocity, hydrography, surface meteorology, and microstructure were made through several squall events during a westerly wind burst that occurred in the Western Pacific warm pool in December 1992. Sustained wind forcing generated a weakly stratified turbulent surface layer that extended to the top of the main thermocline. Following...
Resource Type:: Article
Full Text:: Isolation from Surface Forcing W. D. SMYTH College of Oceanography and Atmospheric Sciences, Oregon State

Creator:: Smyth, W. D., Moum, J. N., Li, L., and Thorpe, S. A.
Abstract:: A new theory of shear instability in a turbulent environment is applied to eight days of velocity and density profiles from the upper-equatorial Pacific. This period featured a regular diurnal cycle of surface forcing, together with a clear response in upper-ocean mixing. During the day, a layer of stable stratification...
Resource Type:: Article
Full Text:: Surface Shear Layer, and the Deep Cycle of Equatorial Turbulence W. D. SMYTH, J. N. MOUM, AND L. LI

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...
Resource Type:: Article
Full Text:: Ocean. Part I: Interpretation as Shear Instabilities J. N. MOUM, J. D. NASH, AND W. D. SMYTH College

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:: Simulations and Microstructure Observations W. D. SMYTH, J. N. MOUM, AND D. R. CALDWELL College of Oceanic

Creator:: Skyllingstad, Eric D., Smyth, W. D., Moum, J. N., and Wijesekera, H.
Abstract:: The response of the upper ocean to westerly wind forcing in the western equatorial Pacific was modeled by means of large-eddy simulation for the purpose of comparison with concurrent microstructure observations. The model was initialized using currents and hydrography measured during the Coupled Ocean–Atmosphere Response Experiment (COARE) and forced using...
Resource Type:: Article
Full Text:: . SKYLLINGSTAD Pacific Northwest National Laboratory, Marine Sciences Laboratory, Sequim, Washington W. D

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