Index Catalog // ScholarsArchive@OSU

An Estimate of Tidal Energy Lost to Turbulence at the Hawaiian Ridge

Creator:: Klymak, Jody M., Moum, James N., Nash, Jonathan D., Kunze, Eric, Girton, James B., Carter, Glenn S., Lee, Craig M., Sanford, Thomas B., and Gregg, Michael C.
Abstract:: An integrated analysis of turbulence observations from four unique instrument platforms obtained over the Hawaiian Ridge leads to an assessment of the vertical, cross-ridge, and along-ridge structure of turbulence dissipation rate and diffusivity. The diffusivity near the seafloor was, on average, 15 times that in the midwater column. At 1000-m...
Resource Type:: Article
Full Text:: ERIC KUNZE, JAMES B. GIRTON, GLENN S. CARTER, CRAIG M. LEE, THOMAS B. SANFORD, AND MICHAEL C. GREGG

Internal Tide Reflection and Turbulent Mixing on the Continental Slope

Creator:: Nash, Jonathan D., Kunze, Eric, Toole, John M., and Schmitt, Ray W.
Abstract:: Observations of turbulence, internal waves, and subinertial flow were made over a steep, corrugated continental slope off Virginia during May–June 1998. At semidiurnal frequencies, a convergence of low-mode, onshore energy flux is approximately balanced by a divergence of high-wavenumber offshore energy flux. This conversion occurs in a region where the...
Resource Type:: Article
Full Text:: AND RAY W. SCHMITT Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods

Turbulence and high-frequency variability in a deep gravity current outflow

Creator:: Nash, Jonathan D., Peters, Hartmut, Kelly, Samuel M., Pelegri, Josep L., Emelianov, Mikhail, and Gasser, Marc
Abstract:: Intensive sampling of the deep Mediterranean outflow 70 km W of the Strait of Gibraltar reveals a strong, tidally modulated gravity current embedded with large-amplitude oscillations and energetic turbulence. The flow appears to be hydraulically controlled at a small topographic constriction, with turbulence and internal waves varying together and increasing...
Resource Type:: Article
Full Text:: turbulent kinetic energy dis- sipation rates � of 10�4–10�2 W/kg during peak outflows [Wesson and Gregg

Internal Bores and Breaking Internal Tides on the Oregon Continental Slope

Creator:: Martini, Kim I., Alford, Matthew H., Kunze, Eric, Kelly, Samuel M., and Nash, Jonathan D.
Abstract:: Observations of breaking internal tides on the Oregon continental slope during a 40-day deployment of 5 moorings along 43°12'N are presented. Remotely generated internal tides shoal onto the slope, steepen, break, and form turbulent bores that propagate upslope independently of the internal tide. A high-resolution snapshot of a single bore...
Resource Type:: Article
Full Text:: W kg21) and sediment is resuspended. At the two deepest slope moorings (1452 and 1780 m), similar

Measurement of Tidal Form Drag Using Seafloor Pressure Sensors

Creator:: Warner, Sally J., MacCready, Parker, Moum, James N., and Nash, Jonathan D.
Abstract:: As currents flow over rough topography, the pressure difference between the up-and downstream sides results in form drag-a force that opposes the flow. Measuring form drag is valuable because it can be used to estimate the loss of energy from currents as they interact with topography. An array of bottom...
Resource Type:: Article
Full Text:: power removed from the tidal currents by form drag was 0.2 W m22, which is 30 times larger than power

Microstructure estimates of turbulent salinity flux and the dissipation spectrum of salinity

Creator:: Nash, Jonathan D. and Moum, James N.
Abstract:: Direct determination of the irreversible turbulent flux of salinity in the ocean has not been possible because of the complexity of measuring salinity on the smallest scales over which it mixes. Presented is an analysis of turbulent salinity microstructure from measurements using a combined fast-conductivity/temperature probe on a slowly falling...
Resource Type:: Article
Full Text:: eddy dif- fusivity for mass (or buoyancy) and its importance in the generation of entropy (Gregg 1984

Energy Flux and Dissipation in Luzon Strait: Two Tales of Two Ridges

Creator:: Alford, Matthew H., MacKinnon, Jennifer A., Nash, Jonathan D., Simmons, Harper, Pickering, Andy, Klymak, Jody M., Pinkel, Robert, Sun, Oliver, Rainville, Luc, Musgrave, Ruth, Beitzel, Tamara, Fu, Ke-Hsien, and Lu, Chung-Wei
Abstract:: Internal tide generation, propagation, and dissipation are investigated in Luzon Strait, a system of two quasi-parallel ridges situated between Taiwan and the Philippines. Two profiling moorings deployed for about 20 days and a set of nineteen 36-h lowered ADCP-CTD time series stations allowed separate measurement of diurnal and semidiurnal internal...
Resource Type:: Article
Full Text:: , where .500-m overturns resulted in dissipation exceeding 2 3 1026 W kg21 (implying diapycnal diffusivity

Energy Flux and Dissipation in Luzon Strait: Two Tales of Two Ridges

Creator:: Alford, Matthew H., MacKinnon, Jennifer A., Nash, Jonathan D., Simmons, Harper, Pickering, Andy, Klymak, Jody M., Pinkel, Robert, Sun, Oliver, Rainville, Luc, Musgrave, Ruth, Beitzel, Tamara, Fu, Ke-Hsien, and Lu, Chung-Wei
Abstract:: Internal tide generation, propagation, and dissipation are investigated in Luzon Strait, a system of two quasi-parallel ridges situated between Taiwan and the Philippines. Two profiling moorings deployed for about 20 days and a set of nineteen 36-h lowered ADCP–CTD time series stations allowed separate measurement of diurnal and semidiurnal internal...
Resource Type:: Article
Full Text:: , where .500-m overturns resulted in dissipation exceeding 2 3 1026 W kg21 (implying diapycnal diffusivity

A Thermocouple Probe for High-Speed Temperature Measurement in the Ocean

Creator:: Nash, Jonathan D., Caldwell, Douglas R., Zelman, Michael J., and Moum, James N.
Abstract:: A fast-response chromel–constantan thermocouple sensor was constructed for use on the microstructure profiler Chameleon and used for 60 ocean profiles off the coast of Oregon. The stability of the thermocouple was compared to that of an FP07 microbead thermistor, and its frequency response was compared to a high-resolution microconductivity probe....
Resource Type:: Article
Full Text:: Batchelor (1959) form1 for temperature-gradient spectrum (Gregg and Meagher 1980). The level of the 1

Global Patterns of Diapycnal Mixing from Measurements of the Turbulent Dissipation Rate

Creator:: Waterhouse, Amy F., MacKinnon, Jennifer A., Nash, Jonathan D., Alford, Matthew H., Kunze, Eric, Simmons, Harper L., Polzin, Kurt L., St. Laurent, Louis C., Sun, Oliver M., Pinkel, Robert, Talley, Lynne D., Whalen, Caitlin B., Huussen, Tycho N., Carter, Glenn S., Fer, Ilker, Waterman, Stephanie, Naveira Garabato, Alberto C., Sanford, Thomas B., and Lee, Craig M.
Abstract:: The authors present inferences of diapycnal diffusivity from a compilation of over 5200 microstructure profiles. As microstructure observations are sparse, these are supplemented with indirect measurements of mixing obtained from (i) Thorpe-scale overturns from moored profilers, a finescale parameterization applied to (ii) shipboard observations of upper-ocean shear, (iii) strain as...
Resource Type:: Article
Full Text:: diffusivity, compiled in Gregg (1998), have been procured from published literature (Osborn 1978, 1980

ScholarsArchive@OSU

An Estimate of Tidal Energy Lost to Turbulence at the Hawaiian Ridge

Internal Tide Reflection and Turbulent Mixing on the Continental Slope

Turbulence and high-frequency variability in a deep gravity current outflow

Internal Bores and Breaking Internal Tides on the Oregon Continental Slope

Measurement of Tidal Form Drag Using Seafloor Pressure Sensors

Microstructure estimates of turbulent salinity flux and the dissipation spectrum of salinity

Energy Flux and Dissipation in Luzon Strait: Two Tales of Two Ridges

Energy Flux and Dissipation in Luzon Strait: Two Tales of Two Ridges

A Thermocouple Probe for High-Speed Temperature Measurement in the Ocean

Global Patterns of Diapycnal Mixing from Measurements of the Turbulent Dissipation Rate

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