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Buoyancy Effects on Coastal and Estuarine Dynamics

Buoyancy Effects on Coastal and Estuarine Dynamics

D. G. Aubrey (Editor), C. T. Friedrichs (Editor)

ISBN: 978-1-118-66514-5

Mar 2013, American Geophysical Union

360 pages

Select type: O-Book

Description

Published by the American Geophysical Union as part of the Coastal and Estuarine Studies, Volume 53.

Coastal water quality, flooding, estuarine habitat diversity, and distribution of coastal organisms depend in part on the dynamics of the coastal water column. Particularly within coastal embayments and estuaries, areas within the influence of freshwater from surface and ground water sources, the water column may be stratified by temperature and/or salinity. Resulting density gradients affect the behavior of the water column, including mixing and transport processes. Understanding physical processes associated with buoyancy in the coastal oceans is a requisite first step towards understanding the effects of buoyancy on coastal processes, including geological, biological and geochemical aspects.

This volume presents 23 papers addressing various aspects of buoyancy in the coastal oceans, including plumes, tidal interaction with buoyancy, shelf dynamics and mixing processes, and estuarine dynamics of buoyancy. The interwoven common thread amongst these articles is how buoyancy processes affect the density stratification and dynamics of shallow coastal flows.

PREFACE
D. G. Aubrey  vii

PART I: INTRODUCTION

1. Introduction
C. T. Friedrichs and David G. Aubrey  1

PART II: BUOYANT PLUMES AND BUOYANCY IN COASTAL SEAS

2. Seasonal Variation of the Baroclinic Circulation in the Scotia-Maine Region
Charles G. Hannah, John W. Loder, and Daniel G. Wright  7

3. Shear Dispersion in a Wind and Density-Driven Plume
A. W. Visser  31

4. Reinforcement of Gravitational Circulation by Wind
Jack Blanton  47

5. Propagation Velocities and Instability Development of a Coastal Current
Timothy P. Mavor and Pablo Huq  59

6. The Influence of the Springs-Neaps Cycle on the Position of Shelf Sea Fronts
Jonathan Sharples and John It. Simpson  71

7. Interaction Between Mean Water Column Stability and Tidal Shear in the Production of Semi-Diurnal Switching of Stratification in the Rhine ROFI
AlejandroJ . Souza and John H. Simpson  83

PART III: BUOYANCY, SALT TRANSPORT AND ESTUARY-SHELF EXCHANGE

8. Detailed Flow Structure Around a Thermohaline Front at the Mouth of Ise Bay, Japan
Tetsuo Yanagi, Xinyu Guo, Takashi Ishimaru, and Toshiro Saino  97

9. The Effect of Hyperpycnai Water on Tidal Exchange
Ned P. Smith  107

10. The Effect of Tidal Motion on the Salinity Distribution in Lower Delaware Bay
Kuo-Chuin Wong  117

11 Formation of the Columbia River Plume Hydraulic Control in Action?
Cynthia N. Cudaback and David A. Jay  139

12. The Role of Thermal Stratification in Tidal Exchange at the Mouth of San Diego Bay
D. B. Chadwick, J. L. Largier, and R. T. Cheng  155

13. Buoyancy Phenomena in the Tweed Estuary
R. C. Uncles and J. A. Stephens   175

14. Salt Transport Calculations From Acoustic Doppler Current Profiler (ADCP) and Conductivity-Temperature-Depth (CTD) Data: A Methodological Study
David J. Kay, David A. Jay, and Jeffery D. Musiak  195

15. Tidal Pumping of Salt in a Moderately Stratified Estuary
I. F. Rockwell Geyer and Heidi Nepf  213

PART IV: ESTUARINE DYNAMICS AND BUOYANCY

16. Density Structures in "Low Inflow Estuaries"
John L. Largier, Clifford J. Hearn, and D. Bart Chadwick  227

17. Effects of Changing Bathymetry on the Summer Buoyancy Dynamics of a Shallow Mediterranean Estuary: Tomales Bay, California
Clifford J. Hearn, John L. Largier, Stephen V. Smith, Joshua Plant, and John Rooney  243

18. A Note on Very Low-Frequency Salinity Variability in a Broad, Shallow Estuary
William W. Schroeder, William J. Wiseman, Jr., Jonathan R. Pennock, and Marlene Noble  255

19. Tidal Interaction with Buoyancy-Driven Flow in a Coastal Plain Estuary
Arnoldo Valle-Levinson and James O'Donnell  265

20. Effects of Channel Geometry on Cross-SectionaVl ariations in Along-Channel Velocity in Partially Stratified Estuaries
Carl T. Friedrichs and John M. Hamrick  283

21. Effect of Variation in Vertical Mixing on Residual Circulation in Narrow, Weakly Nonlinear Estuaries
Kyeong Park and Albert Y. Kuo  301

22. Combined Effects of Buoyancy and Tides Upon Longitudinal Dispersion
Ronald Smith  319

23. The Onset and Effect of Intermittent Buoyancy Changes in a Partially Stratified Estuary
Roy E. Lewis and Jonathan O. Lewis  331

24. The Influence of Buoyancy on Transverse Circulation and on Estuarine Dynamics
Job Dronkers  341