Bottom Boundary Layer Flow Profiling System: ABSTRACT

AAPG Bulletin ◽  
1984 ◽  
Vol 68 ◽  
Author(s):  
Charles E. Adams, Jr., R. D. Freder
Keyword(s):  
Boundary Layer ◽  
Boundary Layer Flow ◽  
Bottom Boundary Layer ◽  
Bottom Boundary ◽  
Layer Flow

Boundary-layer flow and bed shear stress under a solitary wave: revision

2014 ◽  
Vol 753 ◽  
pp. 554-559 ◽  
Author(s):  
Yong Sung Park ◽  
Joris Verschaeve ◽  
Geir K. Pedersen ◽  
Philip L.-F. Liu
Keyword(s):  
Boundary Layer ◽  
Shear Stress ◽  
Solitary Wave ◽  
Boundary Layer Flow ◽  
Bottom Boundary Layer ◽  
Bed Shear Stress ◽  
Bottom Boundary ◽  
Layer Flow

AbstractWe address two shortcomings in the article by Liu, Park & Cowen (J. Fluid Mech., vol. 574, 2007, pp. 449–463), which gave a theoretical and experimental treatise of the bottom boundary-layer under a solitary wave.

Elevated chlorophyll a concentrations associated with a transient shelfbreak front in a western boundary current at Sydney, south-eastern Australia

2000 ◽  
Vol 51 (8) ◽  
pp. 733 ◽  
Author(s):  
Mark T. Gibbs
Keyword(s):  
Boundary Layer ◽  
Chlorophyll A ◽  
Boundary Layer Flow ◽  
Phytoplankton Bloom ◽  
Bottom Boundary Layer ◽  
Western Boundary ◽  
Boundary Current ◽  
Bottom Boundary ◽  
Eastern Australia ◽  
Layer Flow

A mid-water phytoplankton bloom, measured by a five-fold increase in chlorophyll a concentrations above background levels, occurred in coastal waters off Sydney at depths of 80–100 m directly above the shelfbreak. The physical feature underpinning the bloom was a transient shelfbreak front that developed in response to the concurrent actions of an offshore-directed wind-forced bottom boundary-layer flow over the shelf and an onshore-directed bottom boundary-layer flow associated with a meso-scale oceanic eddy over the upper slope. Never previously have these transient fronts been shown to result in phytoplankton blooms on this shelf. The observations are significant because processes leading to nutrient enrichment and enhanced pelagic primary production over continental shelves on western boundaries are in many cases not well understood.

Estimating Turbulence and Shear Stress under Regular Waves from ADV Data

2012 ◽  
Vol 212-213 ◽  
pp. 1083-1091
Author(s):  
Zheng Xiao ◽  
Chao Shen ◽  
Zhi Xin Guan ◽  
Yuan Li ◽  
Rui Min Ji
Keyword(s):  
Boundary Layer ◽  
Shear Stress ◽  
Bottom Boundary Layer ◽  
Wave Flow ◽  
Shear Stresses ◽  
Coastal Morphology ◽  
Bottom Boundary ◽  
Sand Ripples ◽  
Laboratory Flume ◽  
Layer Flow

The boundary layer flow determines the bottom shear stresses, which is key point for sediment transport and thereby the evolution of coastal morphology. The structure of the bottom boundary layer in coastal seas has been of interest to oceanographers for many years. In the paper Acoustic Doppler velocimeter (ADV) technique is applied to measure the bottom boundary layer under cnoidal waves in a laboratory flume with 40-m-long, 0.5-m-wide, and 0.8-m-deep.. Based on the high frequency turbulence signal collected, statistic parameters of cnoidal wave flow are calculated, compared and analyzed. The turbulent structure over plain bed and sand ripples bed are carefully studied. The turbulence intensity of near-bed velocities changes along depth of several phases in a period is analyzed. Turbulent Kinetic Energy Method (TKE Method) is used to estimate near-bed shear stress on flat and slope.

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