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
Full Text:: on Continental Shelves JONATHAN D. NASH College of Earth, Ocean and Atmospheric Sciences, Oregon

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
Full Text:: Jonathan D. Nash,1 and James N. Moum1 Received 24 June 2011; revised 27 March 2012; accepted 2 April 2012

The formation and fate of internal waves in the South China Sea

Creator:: Alford, Matthew H., Peacock, Thomas, MacKinnon, Jennifer A., Nash, Jonathan D., Buijsman, Maarten C., Centurioni, Luca R., Chao, Shenn-Yu, Chang, Ming-Huei, Farmer, David M., Fringer, Oliver B., Fu, Ke-Hsien, Gallacher, Patrick C., Graber, Hans C., Helfrich, Karl R., Jachec, Steven M., Jackson, Christopher R., Klymak, Jody M., Ko, Dong S., Jan, Sen, Johnston, T. M. Shaun, Legg, Sonya, Lee, I-Huan, Lien, Ren-Chieh, Mercier, Matthieu J., Moum, James N., Musgrave, Ruth, Park, Jae-Hun, Pickering, Andrew I., Pinkel, Robert, Rainville, Luc, Ramp, Steven R., Rudnick, Daniel L., Sarkar, Sutanu, Scotti, Alberto, Simmons, Harper L., St. Laurent, Louis C., Venayagamoorthy, Subhas K., Wang, Yu-Huai, Wang, Joe, Yang, Yiing J., Paluszkiewicz, Theresa, and Tang, Tswen-Yung (David)
Abstract:: Internal gravity waves, the subsurface analogue of the familiar surface gravity waves that break on beaches, are ubiquitous in the ocean. Because of their strong vertical and horizontal currents, and the turbulent mixing caused by their breaking, they affect a panoply of ocean processes, such as the supply of nutrients...
Resource Type:: Article
Full Text:: South China Sea Matthew H. Alford1,2, Thomas Peacock3, Jennifer A. MacKinnon1, Jonathan D. Nash4

Structure and composition of a strongly stratified, tidally pulsed river plume

Creator:: Nash, Jonathan, Kilcher, Levi F., and Moum, James N.
Abstract:: The initial composition of a river plume depends on the cumulative turbulent entrainment within the estuary and how this dilutes the supplied freshwater. Here we examine the relative roles of turbulence and freshwater input using observations from the Columbia River estuary and plume during two periods with contrasting river flow....
Resource Type:: Article
Full Text:: , tidally pulsed river plume Jonathan D. Nash,1 Levi F. Kilcher,1 and James N. Moum1 Received 21 July 2008

Small-Scale Processes in the Coastal Ocean

Creator:: Moum, James N., Nash, Jonathan D., and Klymak, Jody M.
Abstract:: Varied observations over Oregon’s continental shelf illustrate the beauty and complexity of geophysical flows in coastal waters. Rapid, creative, and sometimes fortuitous sampling from ships and moorings has allowed detailed looks at boundary layer processes, internal waves (some extremely nonlinear), and coastal currents, including how they interact. These processes drive...
Resource Type:: Article
Full Text:: Atmospheric Sciences, Oregon State University, Corvallis, OR, USA. Jonathan D. Nash is Associate Professor

Shallow Water '06: A Joint Acoustic Propagation/Nonlinear Internal Wave Physics Experiment

Creator:: Tang, Dajun, Moum, James N., Lynch, James F., Abbot, Phil, Chapman, Ross, Dahl, Peter H., Duda, Timothy F., Gawarkiewicz, Glen, Glenn, Scott, Goff, John A., Graber, Hans, Kemp, John, Maffei, Andrew, Nash, Jonathan D., and Newhall, Arthur
Abstract:: Since the end of the Cold War, the US Navy has had an increasing interest in continental shelves and slopes as operational areas. To work in such areas requires a good understanding of ocean acoustics, coastal physical oceanography, and, in the modern era, autonomous underwater vehicle (AUV) operations. Each area...
Resource Type:: Article
Full Text:: Information Systems Specialist, Woods Hole Oceanographic Institution, Woods Hole, MA, USA. JoNathaN d. Nash

Seasonal sea surface cooling in the equatorial Pacific cold tongue controlled by ocean mixing

Creator:: Moum, James N., Perlin, Alexander, Nash, Jonathan D., and McPhaden, Michael J.
Abstract:: Sea surface temperature (SST) is a critical control on the atmosphere(1), and numerical models of atmosphere-ocean circulation emphasize its accurate prediction. Yet many models demonstrate large, systematic biases in simulated SST in the equatorial 'cold tongues' (expansive regions of net heat uptake from the atmosphere) of the Atlantic(2) and Pacific(3)...
Resource Type:: Article
Full Text:: {, Jonathan D. Nash1 & Michael J. McPhaden2 Seasurface temperature (SST) is a critical control on

Oceanic Isopycnal Slope Spectra. Part I: Internal Waves

Creator:: Klymak, Jody M. and Moum, James N.
Abstract:: Horizontal tow measurements of internal waves are rare and have been largely supplanted in recent decades by vertical profile measurements. Here, estimates of isotherm displacements and turbulence dissipation rate from a towed vehicle deployed near Hawaii are presented. The displacement data are interpreted in terms of horizontal wavenumber spectra of...
Resource Type:: Article
Full Text:: CSC, Victoria, BC V8W 3P6, Canada. E-mail: jklymak@uvic.ca MAY 2007 K L Y M A K A N D M O U M 1215

Mixing in the equatorial surface layer and thermocline

Creator:: Moum, James N., Caldwell, Douglas R., and Paulson, Clayton A.
Abstract:: Twelve days of microstructure measurements at the equator (140°W) in November 1984 showed a surprisingly strong effect of both daily cycle of solar heating and wind on mixing in the upper ocean. Because of limited variations in atmospheric forcing and currents during the experiment, processes in the daily mixing cycle...
Resource Type:: Article
Full Text:: Atmospheric Sciences, Oregon State University, Corvallis, OR, USA. Jonathan D. Nash is Associate Professor

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:: Turbulent Salinity Flux and the Dissipation Spectrum of Salinity JONATHAN D. NASH* AND JAMES N. MOUM

ScholarsArchive@OSU

The Unpredictable Nature of Internal Tides on Continental Shelves

The role of turbulence stress divergence in decelerating a river plume

The formation and fate of internal waves in the South China Sea

Structure and composition of a strongly stratified, tidally pulsed river plume

Small-Scale Processes in the Coastal Ocean

Shallow Water '06: A Joint Acoustic Propagation/Nonlinear Internal Wave Physics Experiment

Seasonal sea surface cooling in the equatorial Pacific cold tongue controlled by ocean mixing

Oceanic Isopycnal Slope Spectra. Part I: Internal Waves

Mixing in the equatorial surface layer and thermocline

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

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