Search
Now showing items 1-10 of 16
Turbulence Measurements in the Surf Zone
Publisher: American Meteorological Society
Abstract: Velocity measurements within 1 m of the bottom in approximately 4.5-m water depth on a sand beach provide estimates of turbulent Reynolds shear stress, using a dual-sensor technique that removes contamination by surface ...
A Dynamical Description of Fall and Winter Mean Current Profiles over the Northern California Shelf
Publisher: American Meteorological Society
Abstract: Fall and winter mean current profiles from a midshelf (water depth ?90 m) northern California site exhibit a similar vertical structure for several different years. The alongshelf flow is poleward with a maximum velocity ...
Spatial Scales of Stress-Carrying Nearshore Turbulence
Publisher: American Meteorological Society
Abstract: Measurements from a horizontal array of velocity sensors indicate that the alongshore scales of turbulence contributing to the near-bottom Reynolds stress just seaward of the surf zone on an ocean beach range from 0 to ...
A Two-Spot Sensor for Measurement of Dissipation by Means of Laser-Doppler Velocimetry
Publisher: American Meteorological Society
Abstract: An estimate of the dissipation rate for mechanical energy in a turbulent flow can be obtained by computing the variance of the temporal derivative of the fluid velocity measured at a single point. This technique is not ...
The Bottom Boundary Layer Over the Northern California Shelf
Publisher: American Meteorological Society
Abstract: Moored temperature and shipboard CTD observations from a northern California coastal upwelling region reveal variable bottom mixed-layer heights that are typically 5?15 m, but occasionally exceed 50 m. Observations from ...
Asymmetric Tidal Mixing due to the Horizontal Density Gradient
Publisher: American Meteorological Society
Abstract: Stratification and turbulent mixing exhibit a flood?ebb tidal asymmetry in estuaries and continental shelf regions affected by horizontal density gradients. The authors use a large-eddy simulation (LES) model to investigate ...
The Cospectrum of Stress-Carrying Turbulence in the Presence of Surface Gravity Waves
Publisher: American Meteorological Society
Abstract: AbstractThe cospectrum of the horizontal and vertical turbulent velocity fluctuations, an essential tool for understanding measurements of the turbulent Reynolds shear stress, often departs in the ocean from the shape that ...
Observations of the Transfer of Energy and Momentum to the Oceanic Surface Boundary Layer beneath Breaking Waves
Publisher: American Meteorological Society
Abstract: easurements just beneath the ocean surface demonstrate that the primary mechanism by which energy from breaking waves is transmitted into the water column is through the work done by the covariance of turbulent pressure ...