Index Catalog // ScholarsArchive@OSU

The Unpredictable Nature of Internal Tides on Continental Shelves

Creator:: Nash, Jonathan D., Kelly, Samuel M., Shroyer, Emily L., Moum, James N., and Duda, Timothy F.
Abstract:: Packets of nonlinear internal waves (NLIWs) in a small area of the Mid-Atlantic Bight were 10 times more energetic during a local neap tide than during the preceding spring tide. This counterintuitive result cannot be explained if the waves are generated near the shelf break by the local barotropic tide...
Resource Type:: Article

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

The role of turbulence stress divergence in decelerating a river plume

Creator:: Kilcher, Levi F., Nash, Jonathan D., and Moum, James N.
Abstract:: Turbulence controls the composition of river plumes through mixing and alters the plume's trajectory by diffusing its momentum. While believed to play a crucial role in decelerating river-source waters, the turbulence stress in a near-field river plume has not previously been observationally quantified. In this study, finely resolved density, velocity,...
Resource Type:: Article

Observations of Internal Tides on the Oregon Continental Slope

Creator:: Martini, Kim I., Alford, Matthew H., Kunze, Eric, Kelly, Samuel M., and Nash, Jonathan D.
Abstract:: A complex superposition of locally forced and shoaling remotely generated semidiurnal internal tides occurs on the Oregon continental slope. Presented here are observations from a zonal line of five profiling moorings deployed across the continental slope from 500 to 3000 m, a 24-h expendable current profiler (XCP) survey, and five...
Resource Type:: Article

Estimating Internal Wave Energy Fluxes in the Ocean

Creator:: Nash, Jonathan D., Alford, Matthew H., and Kunze, Eric
Abstract:: Energy flux is a fundamental quantity for understanding internal wave generation, propagation, and dissipation. In this paper, the estimation of internal wave energy fluxes <u′p′> from ocean observations that may be sparse in either time or depth are considered. Sampling must be sufficient in depth to allow for the estimation...
Resource Type:: Article

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

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

Structure and dynamics of the Columbia River tidal plume front

Creator:: Kilcher, Levi F. and Nash, Jonathan D.
Abstract:: Time‐dependent buoyant plumes form at the outflow of tidally dominated estuaries. When estuary discharge velocity exceeds plume internal wave speed c, a sharp front forms at the plume’s leading edge that expands from the time‐dependent source. Using observations of the Columbia River tidal plume from multiple tidal cycles we characterize...
Resource Type:: Article

Internal hydraulic flows on the continental shelf: High drag states over a small bank

Creator:: Nash, Jonathan D. and Moum, James N.
Abstract:: Observations of currents, hydrography, and turbulence provide unambiguous evidence for hydraulic control of flow over an isolated three-dimensional topographic feature on Oregon’s continental shelf. The flow becomes critical at the crest of the bank, forming a strong supercritical downslope flow in the lower layer. Farther downstream, internal hydraulic jumps form...
Resource Type:: Article

The LatMix Summer Campaign: Submesoscale Stirring in the Upper Ocean

Creator:: Shcherbina, Andrey Y., Sundermeyer, Miles A., Kunze, Eric, D'Asaro, Eric, Badin, Gualtiero, Birch, Daniel, Brunner-Suzuki, Anne-Marie E. G., Callies, Jörn, Kuebel Cervantes, Brandy T., Claret, Mariona, Concannon, Brian, Early, Jeffrey, Ferrari, Raffaele, Goodman, Louis, Harcourt, Ramsey R., Klymak, Jody M., Lee, Craig M., Lelong, M.-Pascale, Levine, Murray D., Lien, Ren-Chieh, Mahadevan, Amala, McWilliams, James C., Molemaker, M. Jeroen, Mukherjee, Sonaljit, Nash, Jonathan D., Özgökmen, Tamay, Pierce, Stephen D., Ramachandran, Sanjiv, Samelson, Roger M., Sanford, Thomas B., Shearman, R. Kipp, Skyllingstad, Eric D., Smith, K. Shafer, Tandon, Amit, Taylor, John R., Terray, Eugene A., Thomas, Leif N., and Ledwell, James R.
Abstract:: Lateral stirring is a basic oceanographic phenomenon affecting the distribution of physical, chemical, and biological fields. Eddy stirring at scales on the order of 100 km (the mesoscale) is fairly well understood and explicitly represented in modern eddy-resolving numerical models of global ocean circulation. The same cannot be said for...
Resource Type:: Article

ScholarsArchive@OSU

The Unpredictable Nature of Internal Tides on Continental Shelves

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

The role of turbulence stress divergence in decelerating a river plume

Observations of Internal Tides on the Oregon Continental Slope

Estimating Internal Wave Energy Fluxes in the Ocean

Internal Tide Reflection and Turbulent Mixing on the Continental Slope

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

Structure and dynamics of the Columbia River tidal plume front

Internal hydraulic flows on the continental shelf: High drag states over a small bank

The LatMix Summer Campaign: Submesoscale Stirring in the Upper Ocean

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