Download or read book Continental Shelf Bottom Boundary Layer Model written by William D. Grant and published by . This book was released on 1983 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Continental Shelf Bottom Boundary Layer Model written by Richard Brent Styles and published by . This book was released on 1998 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Continental Shelf Bottom Boundary Layer Model written by and published by . This book was released on 1901 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Submitted in partial fulfillment of the requirements for the degree of Doctor of Science at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution January 1983.
Download or read book A Continental Shelf Bottom Boundary Layer Model written by Scott Michael Glenn and published by . This book was released on 1983 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Modelling of the Continental Shelf Bottom Boundary Layer written by and published by . This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this project was to examine the nature of wind-driven upwelling and downwelling along a 2-dim shelf with sloping bottom topography. The approach was to use the Semi-spectral Primitive Equation Model (SPEM) developed by D. Haidvogel and coworkers as the basic circulation model, and conduct a series of idealized model runs to investigate the influence of bottom slope, surface windstress and heat flux, and mixing on the surface and bottom boundary layers which form during the initial stages of up/downwelling. The advanced turbulent closure schemes of Mellor and Yamada were added to our version of SPEM and the model studies were conducted. These studies showed that an asymmetry develops in the bottom boundary layer thickness depending of if the flow is up or downwelling, and that if the coast is shallow enough, that the surface and bottom boundary layers can merge near the coast. Two AGU abstracts were presented and several talks were given on this work. A paper co-authored with A. Herman on the technical aspects of the vertical model resolution was also published.
Download or read book Design Flow Conditions Near Bottom phase II written by Malcolm L. Spaulding and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanisms of Turbulent Mixing in the Continental Shelf Bottom Boundary Layer written by William J. Shaw and published by . This book was released on 2000 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bottom boundary layer is an important dynamical region of shallow water flows. In this thesis, the problem of turbulent mixing in the coastal bottom boundary layer is investigated with a unique set of field measurements of velocity and sound speed that span a significant fraction of the boundary layer obtained over a six-week long period in the late summer of 1996 on the New England shelf. The energetics of the turbulent fluctuations are investigated by testing simplified budgets for turbulent kinetic energy and scalar variance. The turbulent kinetic energy budget is locally balanced while the scalar variance budget is not, probably due to turbulent diffusion. The direct effects of stratification are consistently significant only in the outer part of the boundary layer, where the flux Richardson number is approximately equal to a critical value of 0.2. Turbulence closure is investigated in terms of non-dimensional profiles of velocity and sound speed. Close to the bottom, the results are consistent with Monin-Obukhov similarity theory, while in the outer part of the boundary layer other scales including the height of the boundary layer are important for setting the turbulent length scale.
Download or read book Stratification Prediction and Bottom Boundary Layer Dynamics Over the Texas Louisiana Continental Shelf written by Wenxia Zhang and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The bottom boundary layer is an unstratified thin layer above the sea floor, separated from the more strongly stratified interior. Formation of a thin bottom boundary layer in the presence of stratification and a sloping bottom is common, and well characterized by theory. This thin layer is an important source of mixing over the continental shelf, and it plays a fundamental role in several continental shelf physical and biogeochemical processes, such as buoyancy advection, bottom material transport and hypoxia formation. In this research, Both observations and numerical models are used to study models' ability of reproducing observed stratification and bottom boundary layer dynamics over the Texas-Louisiana shelf. Simulated vertical stratification, which is also representing the vertical density structure, was first evaluated since it directly controls the bottom boundary layer structure itself and is important for other bottom boundary layer dynamics. A new metric, the histogram of vertical stratification, is introduced in this research to evaluate the models' ability of reproducing observed stratification in a bulk sense. The improvement in model performance is attributed to the finer horizontal and temporal resolutions of a model, while factors like open boundary conditions and vertical resolutions are modified without any improvement in the ability of the model to simulate observed stratification. Towed, undulating CTD profiles collected during Mechanisms Controlling Hypoxia (MCH) program also detected mid-water oxygen minima in many transects. These intrusions are connected with the bottom boundary layer and follows the pycnocline seaward as a mid-water column tongue of low oxygen. We calculate convergence within the bottom boundary layer relative to density surfaces using the simulated results; there is a convergence in the bottom boundary layer at the location where the pycnocline intercepts the bottom, creating an injection of bottom boundary layer water into the pycnocline. Convergent flow at the bottom, relative to isopycnal surfaces, is strongest in the density classes associated with the oxygen minimum layer. We believe these mid-water oxygen minima are actually intrusions of low oxygen protruding from the bottom boundary layer via buoyancy advection driven convergence, following the main pycnocline. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155027
Download or read book Mechanisms of Turbulent Mixing in the Continental Shelf Bottom Boundary Layer written by and published by . This book was released on 2000 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Study of the Bottom Frictional Boundary Layer on the Inner Continental Shelf written by Barry M. Lesht and published by . This book was released on 1977 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wave current Boundary Layer written by Margaret R. Goud and published by . This book was released on 1987 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents an application of the Grant-Madsen-Glenn bottom boundary layer model (Grant and Madsen, 1979; Glenn and Grant, 1987) to predictions of sediment transport on the continental shelf. The analysis is a two-stage process. Via numerical experiment, we explore the sensitivity of sediment transport to variations in model parameters and assumptions. A notable result is the enhancement of suspended sediment stratification due to wave boundary layer effects. When sediment stratification is neglected under conditions of large wave bottom velocities (i.e. ,... ), concentration predictions can be more than an order of magnitude higher than any observed during storm conditions on the continental shelf. A number of limitations to application emerged from the analysis. Solutions to the stratified model are not uniquely determined under a number of cases of interest, potentially leading to gross inaccuracies in the prediction of sediment load and transport. Load and sediment transport in the outer Ekman Layer, beyond the region of emphasis for the model, can be as large or larger than the near-bottom estimates in some cases; such results suggest directions for improvements in the theoretical model. In the second step of the analysis, we test the ability of the model to make predictions of net sediment transport that are consistent with observed sediment depositional patterns. Data from the Mid-Atlantic Bight and the Northern California coast are used to define reasonable model input to represent conditions on two different types of shelves. In these examples, the results show how the intensification of wave bottom velocities with decreasing depth can introduce net transport over a region. The patterns of erosion/deposition are shown to be strongly influenced by sediment stratification and moveable bed roughness. Also predicted by the applications is a rapid winnowing out of fine grain size components when there is even a small variation of bed grain size texture in the along-flow direction.
Download or read book Interaction of High Frequency Internal Waves and the Bottom Boundary Layer on the Continental Shelf written by Lawrence Paul Sanford and published by . This book was released on 1984* with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sedimentary dynamics of continental shelves written by and published by Elsevier. This book was released on 1981-01-01 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sedimentary dynamics of continental shelves
Download or read book Assessment of the U S Outer Continental Shelf Environmental Studies Program written by Division on Earth and Life Studies and published by National Academies Press. This book was released on 1990-02-01 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: A report by the Physical Oceanography Panel of the National Research Council of the United States into the physical oceanographic aspects of the Environmental Studies Program. The Committee evaluated the quality and relevance of studies carried out in waters under federal control which extend from the limits of state jurisdictions (3-12 miles offshore) and include the central and outer continental shelf waters and the continental slope of the United States.
Download or read book Assessment of the U S Outer Continental Shelf Environmental Studies Program Physical oceanography written by National Research Council (U.S.). Committee to Review the Outer Continental Shelf Environmental Studies Program. Physical Oceanography Panel and published by . This book was released on 1990 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: A report by the Physical Oceanography Panel of the National Research Council of the United States into the physical oceanographic aspects of the Environmental Studies Program. The Committee evaluated the quality and relevance of studies carried out in waters under federal control which extend from the limits of state jurisdictions (3-12 miles offshore) and include the central and outer continental shelf waters and the continental slope of the United States.
Download or read book California OCS Phase II Monitoring Program written by and published by . This book was released on 1992 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
