Public awareness of the importance of Antarctic research, particularly in relation to global problems, has increased. The book spans a broad spectrum of Antarctic science from the "ozone hole" to microbiology to the sea ice. The main focus is on the role of Antarctica and the Southern Ocean in the world climate system, e.g. the formation of sea ice and its relevance to ocean circulation, the biological pump in relation to CO2 release. The past climate history is revealed by the analysis of ice cores and sediments. Studies of plate tectonics and fossil records reach further back in earth history. Key words in the biological chapters are krill and the rich Antarctic benthos. Finally, the potential conflict between conservationists, researchers and tourists is discussed.

The book content corresponds to a course of the International Summer School of Theoretical Geodesy held every 4 years under the sponsorship of the International Association of Geodesy. This particular course, that was given at the International Centre for Theoretical Physics in Trieste, has been dedicated to the theory of satellite altimetry as a response to the increasing need of scientific work in this field due to important recent and forthcoming space mission. The course was conceived to supply a good theoretical basis in both disciplines, i.e. geodesy and oceanography, which are deeply involved in the analysis and in the use of the altimetric signal. The main items of interest are the physical theory of ocean circulation, the theory of tides and the ocean time-variability, from the point of view of oceanography and the orbit theory, with particular regard to the formation of the radial orbital error, the so-called cross over adjustment, the analysis of geodetic boundary value problems, the integrated determination of the gravity field and of the radial orbital error, from the point of view of geodesy. All these arguments are treated from the foundation by very-well experts of the various fields, to introduce the reader into the more difficult subjects on which advanced research is currently performed. The peculiarity of the book is in its interdisciplinarity as it can serve to both communities of oceanographers and geodesists to get acquainted with advanced aspects one of the other.

The laboratory work to the dynamics of turbidity currents, outlined in this volume, is the first experimental investigation of the nature of downslape gravity-driven currents of suspended sediments which are reflected/ deflected against obstacles such as seamounts oceanfloor slopes. Scientists and researchers working on the interpretation and understanding of features occurring in sequence stratigraphic sections will find useful clues.

In the early 1950s microseisms, with characteristic amplitudes of several micro meters, were considered insignificant relative to powerful destructive earthquakes. They were understood to be noise, as natural fluctuations, not carrying any in formation and distorting recordings on seismograms. Intensive investigations over subsequent decades have shown, however, that microseisins are only a single facet of a huge complex of phenomena comprising cyclone movement over oceans, sea roughness, infrasound, geomagnetic micropulsations, terrestial of these phenomena proved to be confined in time currents, etc. The source and space, whereas their effects propagated over global distances. This could be interpreted as a case of natural "remote sensing." It should be mentioned that all of the evidence gathered in the last few decades supports the theory of M. S. Longuet-Higgins published in 1950. The author has been engaged in problems of microseisms since 1955 and is deeply convinced that these phenomena are not only of theoretical interest but may also find practical application in meteorology, oceanology, navigation and other areas. She hopes. that this book will stimulate further research as well as new approaches to practical problems."

This book reviews the origin, development, morphology, environment and ecology of the world's coastal lagoons. There are particularly extensive series of lagoons - areas of salt or brackish water separated from the adjacent sea by a low-lying sand or shingle barrier - along the eastern and Gulf of Mexico coasts of the USA, in Mexico itself, in Brazil, West Africa, Natal, southern and eastern India, south-west and south-east Australia, Alaska, Siberia and around the shores of the Mediterranean, southern Baltic, Black and Caspian Seas. In several of these areas they support important fisheries. This book summarises what is known of the formation and fate of lagoons, the lagoonal environment, lagoonal ecology, the strategies of lagoonal species, the human use of lagoons, besides containing a general introduction and a section on methods for the study of coastal lagoons.

A revision of this introduction to the study of the sea, the second edition has been expanded and reorganized, with many new figures and tables. Every chapter has been updated and many have been rewritten. A new chapter on man's use of the oceans has been included to cover satellites and position fixing, renewable energy sources in the sea, seabed minerals, oil and gas, pollution and maritime law. In this edition, the authors refer to original references and review articles, so that readers can find their way into the literature more easily. The text draws on examples from a wide range of seas.

This study of organic carbon accumulation in marine environments begins with a review of mechanisms controlling organic carbon deposition, concentrating on results from expeditions into Baffin Bay and the Labrador Sea, as well as the Sea of Japan and the northwest coast of Africa. Major objects of the study were the reconstruction of changes in palaeoceanic variables and the history of palaeoclimates in different environments. The contributors also developed more general models for organic carbon accumulation and compared organic-carbon characteristics derived from different analytical techniques in order to reach the best-fitting interpretation model.

Salt marshes are highly dynamic and important ecosystems that dampen impacts of coastal storms and are an integral part of tidal wetland systems, which sequester half of all global marine carbon. They are now being threatened due to sea-level rise, decreased sediment influx, and human encroachment. This book provides a comprehensive review of the latest salt marsh science, investigating their functions and how they are responding to stresses through formation of salt pannes and pools, headward erosion of tidal creeks, marsh-edge erosion, ice-fracturing, and ice-rafted sedimentation. Written by experts in marsh ecology, coastal geomorphology, wetland biology, estuarine hydrodynamics, and coastal sedimentation, it provides a multidisciplinary summary of recent advancements in our knowledge of salt marshes. The future of wetlands and potential deterioration of salt marshes is also considered, providing a go-to reference for graduate students and researchers studying these coastal systems, as well as marsh managers and restoration scientists.

It is now nine years since the first edition appeared and much has changed in marine science during that time. For example, satellites are now routinely used in remote sensing of the ocean surface and hydrothermal vents at sea floor spreading centres have been extensively researched. The second edition has been considerably expanded and reorganised, and many new figures and tables have been included. Every chapter has been carefully updated and many have been rewritten. A new chapter on man's use of the oceans has been included to cover satellites and position fixing, renewable energy sources in the sea, seabed minerals, oil and gas, pollution and maritime law. In this edition we have also referred to a number of original references and review articles so that readers can find their way into the literature more easily. As in the first edition, PSM has been mainly responsible for the text and lIC for the illustrations, although each has responded to advice from the other and also from many colleagues. In this context readers should note that the illustrations form an integral and major part of the book. The text will almost certainly be too concise for many readers if they do not study the illustrations carefully at the same time. The book has been written as an introductory text for students, although it can serve anyone who is beginning a study of the sea.

Aimed at graduate students, researchers and academics in mathematics, engineering, oceanography, meteorology, and mechanics, this text provides a detailed introduction to the physical theory of rotating fluids, a significant part of geophysical fluid dynamics. The text is divided into four parts, with the first part providing the physical background of the geophysical models to be analyzed. Part two is devoted to a self contained proof of the existence of weak (or strong) solutions to the imcompressible Navier-Stokes equations. Part three deals with the rapidly rotating Navier-Stokes equations, first in the whole space, where dispersion effects are considered. The case where the domain has periodic boundary conditions is then analyzed, and finally rotating Navier-Stokes equations between two plates are studied, both in the case of periodic horizontal coordinated and those in R2. In Part IV, the stability of Ekman boundary layers and boundary layer effects in magnetohydrodynamics and quasigeostrophic equations are discussed. The boundary layers which appear near vertical walls are presented and formally linked with the classical Prandlt equations. Finally spherical layers are introduced, whose study is completely open.

It is widely accepted that there is a relationship between ice volume and the solar insolation in summer in the northern hemisphere. The Earth's glacial cycles are driven by cyclic changes in the Earth's orbital elements. This conclusion is based on the strong coherence between the approx. 20000 and 40000 year spectral components of ice volume and insolation (Milankovitch-curve) records. These frequencies are determined by the variation of the obliquity of the Earth's axis and by its position relative to the Earth's orbit around the sun. The degree of sum mer insolation on the Earth's northern Hemisphere is believed to be relevant to climate because the North Atlantic is where cold saline water is being formed. Present day deep water circulation is driven by salt build-up in due to net evapora tion. In contrast, in the North Pacific precipitation exceeds evaporation. Thus, deep water transfers a surplus of salt from the N. Atlantic to the North Pacific. This surface water delivers also oxygen to the deep ocean. In contrast, upwelling deep water transfers nutrients from the deep ocean to the surface water. Today the time of renewal of deep water is in the order of 1000 years."

This selection of papers emphasizes the advances in the field and covers a wide range of topics in geophysics, geodynamics, and oceanography to which modern geodesy is contributing.

For future studies of oceanic circulation it is necessary to develop the tritium measurement via 3He ingrowth into a routine procedure with a high capacity for efficient use. This paper attempts to demonstrate that this can be achieved using a commercial helium isotope mass spectrometer and special procedures for sample preparation, storage for 3He ingrowth, and 3He transfer from the ingrowth containers into the mass spectrometer. This method allows for measurement with a much higher precision and lower detection limit than is possible with counting techniques. Additionally, the parameters and blanks in routine operation of the system are discussed.

Lying along the eastern seaboard of South Africa, the province of Natal has many important associations with the ocean. There is a considerable wealth of information available, presented by specialists from academia and state-funded research organizations. Thus, this volume provides the reader with a broad and thorough overview of the oceanography of this important region of the Southern African coastline. This volume will be of interest to a wide audience of oceanographers, marine geologists, and geographers.

Along much of the shoreline of the world, tidal inlets play an important role in nearshore processes, providing links between the coastal oceans and protected embayments. Their study is of particular importance not only for the understanding of fundamental processes in coastal oceanography but also for engineering and the proper management of the delicate equilibrium of our shorelines. This volume, based on the International Symposium on Hydrodynamics and Sediment Dynamics of Tidal Inlets held at Woods Hole, MA, presents the reader with an overview of contemporary research on these important features. The coverage includes: - mathematical modelling, including a review of inlet hydrodynamics, - observations on hydrodynamics, - sedimentology and morphology, - tidal deltas, - processes and policies pertaining to sedimentation, and the - impacts of shore protection and dredging in beaches.

The last one or two decades have witnessed an increased interest in to pographic Rossby waves, both from a theoretical computational as well as an observational point of view. However, even though long periodic pro cesses were observed in lakes and ocean basins with considerable detail, it appears that interpretation in terms of physical models is not suffi ciently conclusive. The reasons for this lack in understanding may be sought both, in the insufficient spatial resolution or the brevity of the time series of the available data and the inadequacy of the theoretical understanding of long periodic oscillating processes in lakes and ocean bays. Advancement will emerge from intensified studies of both aspects, but it is equally our believe that the understanding of long per'iodic oscillations in lakes is presently likely to profit most from a theore tical-computational study of topographic Rossby waves in enclosed basins. With this tractate we aim to provide the reader with the basic concepts of wave motion in shallow waters at subinertial frequencies. Our ques tions throughout this monogra h are essentially: How can the solutions to this topographic wave equation in a prescribed idealized domain be construced; what are the physical properties of these solutions; are their features identifiable by observations; how reliable are such in terpretations, etc."

During the past several years, research into the frontal divisions of the ocean has been particularly intensive. The significance of this lies not only in the fact that, in the five years from 1976 to 1980, more than 500 papers on this question were published in various journals throughout the world and at least three major international discussions were held (see p. 17). The newness of the discussion of the topic stems from the qualitative reinterpretation of the physical essence of the phenomenon and its role in the ocean, particularly in the processes of mixing and structure formation. While in the past the conventional view of fronts as boundaries between large scale water masses of the ocean only led to the recognition of convenient classi fication limits created by nature itself, there is now a tendency to study oceanic fronts as integral elements of the dynamics of oceanic waters. As we understand it, fronts are being associated more and more with the dynamic and kinematic features which arise when kinetic energy and enstrophy are transmitted through a cascade of scales characterizing various forms of motion of a stratified medium in laterally confined oceanic basins. We are beginning to get a better understanding of the role synoptic-scale oceanic eddies play in the process of frontogenesis in the ocean."

Instabilities are present in all natural fluids from rivers to atmospheres. This book considers the physical processes that generate instability. Part I describes the normal mode instabilities most important in geophysical applications, including convection, shear instability and baroclinic instability. Classical analytical approaches are covered, while also emphasising numerical methods, mechanisms such as internal wave resonance, and simple `rules of thumb' that permit assessment of instability quickly and intuitively. Part II introduces the cutting edge: nonmodal instabilities, the relationship between instability and turbulence, self-organised criticality, and advanced numerical techniques. Featuring numerous exercises and projects, the book is ideal for advanced students and researchers wishing to understand flow instability and apply it to their own research. It can be used to teach courses in oceanography, atmospheric science, coastal engineering, applied mathematics and environmental science. Exercise solutions and MATLAB (R) examples are provided online. Also available as Open Access on Cambridge Core.

The marine environment does not naturally respect arbitrary international boundaries. The establishment and management of transboundary marine protected areas therefore presents major governance challenges. This book analyses a series of marine transboundary conservation initiatives embedded in varying contextual situations to examine the underlying reasons for their success or failure. Utilising an adapted 'pathways of influence' framework, it provides insights into the development of marine transboundary conservation initiatives looking at the effectiveness of international rules, international norms and discourse, market forces and direct access to policy making. Examples come from a wide range of jurisdictions, including territorial seas, continental shelves, exclusive economic zones and areas beyond national jurisdiction. Case studies include initiatives in the Coral Triangle, West Africa, Central America, the Wadden Sea, the Red Sea and the Mediterranean Sea. In addition the authors assess the potential for developing wider international cooperation as a result of relationships forged though involvement within these marine transboundary conservation initiatives.

Published on behalf of The Commission of the European Communities Directorate-General Information, Market and Innovation

The present lecture notes cover a first course in th most common types of stratified flows encountered in Environ mental Hydraulics. Most of the flows are buoyancy flows, i.e. currents in which gravity acts on small density differences. Part I presents the basic concepts of stagnant, densit- stratified water, and of flowing non-miscible stratified fluids. The similarity to the (presumed) well-known open channel flow, subject to a reduced gravity, is illustrated. Part II treats the miscible density stratified flows. In outlining the governing equations, the strong coupling between the turbulence (the mixing) and the mean flow is emphasized. The presentation and discussions of the basic governing equa tions are followed by illustrative examples. Separate chapters are devoted to Dense Bottom Currents, Free Penetrative Convec tion, Wind-driven Stratified Flow, Horizontal Buoyancy Flow and Vertical jet/plumes. Part III presents some examples of practical problems solved on the basis of knowledge given in the present lecture notes. It is the author's experience that the topics treated in chapter 8 and in the subsequent chapters are especially well suited for self-tuition, followed by a study-circle. ACKNOWLEDGEMENT The author has benefited by the valuable help of his col legues at the Institute of Hydrodynamics and Hydraulic Engin eering, the Technical University of Denmark, especially our librarian Mrs. Kirsten Djcentsrup, our secretary Mrs. Marianne Lewis and our technical draftsman Mrs. Liselotte Norup."

Exploration of the oceans using geophysical methods has had a profound effect on the way we view the structure of the Earth and its behaviour through geological time. Geophysics has also played a vital role in the search for petroleum and other natural resources lying beneath the seabed.

This volume on marine geophysics has two objectives: to provide a comprehensive review of techniques and to examine what geophysical observations can tell us about the structure and tectonics of the oceans. Central to geophysical work at sea are the means of locating observations accurately and determining in detail the morphology of the sea floor. These topics are discussed early in the book. Considered next are the powerful seismic techniques for imaging the Earth’s interior from shallow coastal areas to the deep-sea trenches. Further chapters focus on the gravity and magnetic fields over the oceans, heat flow, electrical and radiometric methods and measurements in offshore boreholes. In later parts of the book, wide-ranging geophysical observations are brought together in chapters on the development of the modern oceans, the structure of their deep basins and the nature of their aseismic and seismically active margins.

This book will be of interest to marine scientists and advanced undergraduates and postgraduates following courses on, or undertaking research in, geophysics, marine geology, oceanography, physical sciences, remote sensing, marine surveying and offshore engineering. Contents:

1. Preview
2. Locating offshore observations
3. Seabed imaging by sonar and lidar
4. Seismic exploration at sea: a theoretical background
5. Seismic data acquisition at sea
6. The marine gravity field
7. The Earth’s magnetic field at sea
8. Heat flow
9. Investigations of the sea floor using electrical methods
10. Seabed exploration using radiometric methods
11. Geophysical observations in offshore boreholes
12. Deep-sea geophysics and the changing geometry of the oceans
13. Studies of the oceanic lithosphere: the sedimentary cover
14. Studies of the oceanic lithosphere: the crustal basement and upper mantle
15. Investigations of divergent and transform continental margins
16. Studies of subduction zones

Combining images from world's leading marine and nature photographers and the latest in underwater photography techniques, The Life & Love of the Sea is a breathtaking visual tour of the ocean's many facets. Readers will experience the land meeting the sea with images of dramatic coastlines, barrier reefs and island chains, and the breathtaking power of the ocean through a stunning collection of wave photographs. Forming an extensive survey of the ocean's many fascinating inhabitants, Blackwell presents an incredible image collection of everything from whales, to manta rays, to seals, to endless schools of fish, to the creatures that reside in the deepest recesses of the ocean floor, and much more. The book also includes bonus footage via a scannable QR code from multi award-winning underwater cameraman Steven Hathaway, whose work has featured in numerous documentaries on BBC, Discovery Channel and National Geographic.

The background for the Workshop on Cohesive Sediment Dynamics - . !!!!!. Special Reference to Physical Processes in Estuaries is briefly outlined in Chapter I. Here I wish to acknowledge those whose support I consider to be pivotal to this under taking. My deepest appreciation goes to Cynthia Vey, whose organizational skills and dedicated effort made the completion of this volume possible. Thanks are also due to Gail Terry for workshop organization, Jean Branson for word processing and Lillean Pieter for helping with drawings. Finally, I must express my sincere appreciation to Arthur Ezra 9f the National Science Foundation for providing support (through Grant No. CEE-8401185) for the workshop, and to Hsiang Wang for depart mental encouragement. With deepest regret, I must note the untimely death of Ranjan Ariathurai, 39, on June 5, 1985, before this volume could be published. He was a guiding force to many within the small group of researchers in cohesive sediment dynamics, and his professional brilliance and inspirational personal qualities constituted the true spirit . behind the workshop. I trust this volume will serve, albeit in a small way, as a fitting memory to this spirit, and to the remarkable professional contributions Ranjan made during his short career. Professor Ray B. Krone Professor Emmanuel Partheniades Department of Civil Engineering Department of Engineering Sciences University of California University of Florida Davis, California Gainesville, Florida TABLE OF CONTENTS CHAPTER PAGE I. INTRODUCTION Ashish J. Mehta **************************************************** 1 II.