Index Catalog // ScholarsArchive@OSU

Creator:: Anis, A. and Moum, J. N.
Abstract:: A freely rising profiler was used to collect vertical microstructure profiles in the upper oceanic boundary layer under various atmospheric and sea conditions. Near the sea surface, the rate of viscous dissipation of turbulence kinetic energy, ϵ, exhibited a range of behaviors under different forcing conditions. Sometimes, ϵ was closely...
Resource Type:: Article

Creator:: Anis, A. and Moum, J. N.
Abstract:: A detailed investigation of the upper ocean during convection reveals 1. • the vertical structure of potential temperature, θ, to be steady in time, and 2. • the current shear to vanish in the bulk of the mixed layer. These imply that a “slab”-type model may be an adequate representation...
Resource Type:: Article

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:: is the variance of vertical displacements: Z 2 �� b2N0 N �2 � f 2 �2 , �4� where b � 1300 m

Creator:: Moum, J. N., Klymak, J. M., Nash, J. D., Perlin, A., and Smyth, W. D.
Abstract:: Winter stratification on Oregon’s continental shelf often produces a near-bottom layer of dense fluid that acts as an internal waveguide upon which nonlinear internal waves propagate. Shipboard profiling and bottom lander observations capture disturbances that exhibit properties of internal solitary waves, bores, and gravity currents. Wavelike pulses are highly turbulent...
Resource Type:: Article
Full Text:: F P H Y S I C A L O C E A N O G R A P H Y VOLUME 37 spective suggests circulation in the x–z

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

Creator:: Zaron, Edward D. and Moum, James N.
Abstract:: A reexamination of turbulence dissipation measurements from the equatorial Pacific shows that the turbulence diffusivities are not a simple function of the gradient Richardson number. A widely used mixing scheme, the K-profile parameterization, overpredicts the turbulent vertical heat flux by roughly a factor of 4 in the stably stratified region...
Resource Type:: Article
Full Text:: turbulence parameterization must include a dependence on both Ri and the forcing OCTOBER 2009 Z A R O N A N

Creator:: Klymak, Jody M. and Moum, James N.
Abstract:: Isopycnal slope spectra were computed from thermistor data obtained using a microstructure platform towed through turbulence generated by internal tidal motions near the Hawaiian Ridge. The spectra were compared with turbulence dissipation rates ε that are estimated using shear probes. The turbulence subrange of isopycnal slope spectra extends to surprisingly...
Resource Type:: Article
Full Text:: JAMES N. MOUM College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon

Creator:: Moum, J. N. and Nash, J. D.
Abstract:: Recent turbulence measurements over a small bank on the continental shelf off Oregon reveal a previously undetected site for intense mixing of the coastal ocean. The flow is hydraulically controlled and turbulence diffusivities over the bank are more than 100 times greater than estimates made on the shelf away from...
Resource Type:: Article
Full Text:: phoc_30_1106.2049_2054.tp 1 AUGUST 2000 2049M O U M A N D N A S H q

Creator:: Scott, R. K., Allen, J. S., Egbert, G. D., and Miller, R. N.
Abstract:: An idealized, linear model of the coastal ocean is used to assess the domain of influence of surface type data, in particular how much information such data contain about the ocean state at depth and how such information may be retrieved. The ultimate objective is to assess the feasibility of...
Resource Type:: Article
Full Text:: 5 2p 2 r, (2.3e)z where S 5 N 2H 2/ f 2L2 is a stratification parameter and N 2 5 2gr z/r0 is a

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:: –Väisälä frequency is given by 2ˆ ̂N 5 gu . (14),z Here and elsewhere, the hat indicates a quantity com

ScholarsArchive@OSU