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Creator:: Moum, James N.
Abstract:: Estimates of heat flux from direct measurements of vertical velocity-temperature fluctuation correlations have been obtained from vertical profiles through turbulent patches in the main thermocline. These have been compared to more indirect flux estimates derived from dissipation rates of turbulent kinetic energy and temperature variance. Because record lengths are limited...
Resource Type:: Article
Full Text:: variance X. The turbulent flux of heat F (as it appears in the Reynolds-averaged equations) [e.g., Gregg

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....
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Full Text:: , tidally pulsed river plume Jonathan D. Nash,1 Levi F. Kilcher,1 and James N. Moum1 Received 21 July 2008

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,...
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Full Text:: plume The role of turbulence stress divergence in decelerating a river plume Levi F. Kilcher,1

Creator:: Moum, James N., Kawall, J. G., and Keffer, J. F.
Abstract:: An experimental investigation of a two·dimensional turbulent jet in a quiescent environment has been carried out to determine the structural characteristics of the outer, intermittent turbulent motion. An overall picture of this motion was deduced from the results which indicate that, on the average, the turbulent bulges are of the...
Resource Type:: Article

Creator:: Moum, James N.
Abstract:: From measurements of the energy‐containing scales of turbulence in the ocean thermocline, two new formulations are examined: (1) an inviscid estimate for the viscous dissipation rate of turbulent kinetic energy and (2) a mixing length estimate for the turbulent heat flux. These formulations are tested using coincident measurements of the...
Resource Type:: Article
Full Text:: dissipation method, in which the turbulent heat flux F, as it is represented by the correlation of vertical

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...
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Full Text:: Australia, Australia EMILY L. SHROYER AND JAMES N. MOUM College of Earth, Ocean and Atmospheric Sciences

Creator:: Zhang, Yanwei and Moum, James N.
Abstract:: A procedure for estimating thermal variance dissipation rate χ[subscript]T by scaling the inertial-convective subrange of temperature gradient spectra from thermistor measurements on a Tropical Atmosphere Ocean (TAO) equatorial mooring, maintained by NOAA’s National Data Buoy Center, is demonstrated. The inertial-convective subrange of wavenumbers/frequencies is contaminated by the vertical motion induced...
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Full Text:: of Marine Geology, Tongji University, Shanghai, China JAMES N. MOUM College of Oceanic and

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...
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Full Text:: . James F. LyNch (jlynch@whoi.edu) is Senior Scientist, Woods Hole Oceanographic Institution, Woods Hole

Creator:: Nash, Jonathan D. and Moum, James N.
Abstract:: At the smallest length scales, conductivity measurements include a contribution from salinity fluctuations in the inertial–convective and viscous–diffusive ranges of the turbulent scalar variance spectrum. Interpreting these measurements is complicated because conductivity is a compound quantity of both temperature and salinity. Accurate estimates of the dissipation rate of salinity variance...
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Full Text:: Microstructure Measurements JONATHAN D. NASH AND JAMES N. MOUM College of Oceanic and Atmospheric Sciences

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:: phoc_32_903.2312_2333.tp 2312 VOLUME 32J O U R N A L O F P H Y S I C A

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