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Mixing Measurements on an Equatorial Ocean Mooring
Publisher: American Meteorological Society
Abstract: Vaned, internally recording instruments that measure temperature fluctuations using FP07 thermistors, including fluctuations in the turbulence wavenumber band, have been built, tested, and deployed on a Tropical Atmosphere ...
Topographically Induced Drag and Mixing at a Small Bank on the Continental Shelf
Publisher: American Meteorological Society
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 ...
Seafloor Pressure Measurements of Nonlinear Internal Waves
Publisher: American Meteorological Society
Abstract: Highly resolved pressure measurements on the seafloor over New Jersey?s continental shelf reveal the pressure signature of nonlinear internal waves of depression as negative pressure perturbations. The sign of the perturbation ...
Observations of Polarity Reversal in Shoaling Nonlinear Internal Waves
Publisher: American Meteorological Society
Abstract: Observations off the New Jersey coast document the shoaling of three groups of nonlinear internal waves of depression over 35 km across the shelf. Each wave group experienced changing background conditions along its shoreward ...
Differential Diffusion in Breaking Kelvin–Helmholtz Billows
Publisher: American Meteorological Society
Abstract: Direct numerical simulations are used to compare turbulent diffusivities of heat and salt during the growth and collapse of Kelvin?Helmholtz billows. The ratio of diffusivities is obtained as a function of buoyancy Reynolds ...
Narrowband Oscillations in the Upper Equatorial Ocean. Part I: Interpretation as Shear Instabilities
Publisher: American Meteorological Society
Abstract: Extended measurements of temperature fluctuations that include the turbulence wavenumber band have now been made using rapidly sampled fast thermistors at multiple depths above the core of the Equatorial Undercurrent on ...
Narrowband Oscillations in the Upper Equatorial Ocean. Part II: Properties of Shear Instabilities
Publisher: American Meteorological Society
Abstract: Narrowband oscillations observed in the upper equatorial Pacific are interpreted in terms of a random ensemble of shear instability events. Linear perturbation analysis is applied to hourly averaged profiles of velocity ...
Energy Transport by Nonlinear Internal Waves
Publisher: American Meteorological Society
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 ...