Coastal Acoustic Tomography

Coastal Acoustic Tomography
Author: Arata Kaneko,Xiao-Hua Zhu,Ju Lin
Publsiher: Elsevier
Total Pages: 362
Release: 2020-02-05
ISBN 10: 0128189428
ISBN 13: 9780128189429
Language: EN, FR, DE, ES & NL

Coastal Acoustic Tomography Book Review:

Coastal Acoustic Tomography begins with the specifics required for designing a Coastal Acoustic Tomography (CAT) experiment and operating the CAT system in coastal seas. Following sections discuss the procedure for data analyses and various application examples of CAT to coastal/shallow seas (obtained in various locations). These sections are broken down into four kinds of methods: horizontal-slice inversion, vertical-slice inversion, modal expansion method and data assimilation. This book emphasizes how dynamic phenomena occurring in coastal/shallow seas can be analyzed using the standard method of inversion and data assimilation. The book is relevant for physical oceanographers, ocean environmentalists and ocean dynamists, focusing on the event being observed rather than the intrinsic details of observational processes. Application examples of successful dynamic phenomena measured by coastal acoustic tomography are also included. Provides the information needed for researchers and graduate students in physical oceanography, ocean-fluid dynamics and ocean environments to apply Ocean Acoustic Tomography (OAT) to their own fields Presents the benefits of using acoustic tomography, including less disturbance to aquatic environments vs. other monitoring methods Includes the assimilation of CAT data into a coastal sea circulation model, a powerful tool to predict coastal-sea environmental changes

A Tactical Application of Coastal Acoustic Tomography

A Tactical Application of Coastal Acoustic Tomography
Author: Jeroen Franken
Publsiher: Unknown
Total Pages: 56
Release: 1994
ISBN 10: 1928374650XXX
ISBN 13: OCLC:640627880
Language: EN, FR, DE, ES & NL

A Tactical Application of Coastal Acoustic Tomography Book Review:

The objective of this study is to investigate the utility of acoustic tomography for performance assessment of a generic low frequency active sonar system. The performance of the sonar is simulated using tomography-derived sound speed data versus a range independent ocean model. The ocean environment used in the simulation is 159 tomographic snapshots of the Barents Sea Polar Front, taken every 5 minutes in August 1992. The modeled sonar system consists of a 1000 Hz source with a source level of 205.5 dB and a towed horizontal array of hydrophones. The system is derived from unclassified parameters of ATAS (Active Towed Array Sonar), built by Thomson Sintra ASM and British Aerospace SEMA, and the experimental ALF sonar, designed by FEL-TNO (the Netherlands) and built by Thomson Sintra ASM. The tomographic images over a range of 26 km provide a realistic ocean in which system performance is assessed. This study used a broadband, coupled normal mode, propagation model and assumed a noise-limited condition. The probability of detection calculated as a function of time for 13 hours is compared with that estimated using a range- and time-independent assumption. The utility of coastal acoustic tomography for tactical applications is discussed. (AN).

Coastal Acoustic Tomography Data Constraints Applied to a Coastal Ocean Circulation Model

Coastal Acoustic Tomography Data Constraints Applied to a Coastal Ocean Circulation Model
Author: Ngoc Ly Le,Ching-sang Chiu,United States. Office of Naval Research,Naval Postgraduate School (U.S.)
Publsiher: Unknown
Total Pages: 44
Release: 1994
ISBN 10: 1928374650XXX
ISBN 13: OCLC:32288191
Language: EN, FR, DE, ES & NL

Coastal Acoustic Tomography Data Constraints Applied to a Coastal Ocean Circulation Model Book Review:

A direct insertion scheme for assimilating coastal acoustic tomographic (CAT) vertical temperature sections into a multilevel, coastal primitive equation model for the Gulf of Sirte (Lybia) is investigated using computer simulation experiments. Although the model was developed for the whole Mediterranean Sea (MED), only a model sub-domain covering the Gulf of Sirte was used in this study. The model has realistic coastlines and bottom topography, and a coastal-following, curvilinear, nearly orthogonal, horizontal coordinate system with a horizontal resolution of about 10 by 10 km. The grid of the model was designed using a grid generation/focusing technique. The model has complete thermodynamics, second order turbulence closure, and 16 bottom-following (sigma) vertical levels. To generate the true ocean for this study, the model was first spun up for 30 days with the Levitus temperature and salinity and ECMWF wind climatologies, and then run for one year and more. The last 60 days of this control run were taken to represent actuality.

High frequency Acoustic Tomography in a High current Coastal Environment

High frequency Acoustic Tomography in a High current Coastal Environment
Author: Dianne Elizabeth Egnor
Publsiher: Unknown
Total Pages: 394
Release: 2000
ISBN 10: 1928374650XXX
ISBN 13: OCLC:48652475
Language: EN, FR, DE, ES & NL

High frequency Acoustic Tomography in a High current Coastal Environment Book Review:

Measuring Ocean Currents

Measuring Ocean Currents
Author: Antony Joseph
Publsiher: Newnes
Total Pages: 448
Release: 2013-08-12
ISBN 10: 0123914280
ISBN 13: 9780123914286
Language: EN, FR, DE, ES & NL

Measuring Ocean Currents Book Review:

Measuring Ocean Currents: Tools, Technologies, and Data covers all major aspects of ocean current measurements in view of the implications of ocean currents on changing climate, increasing pollution levels, and offshore engineering activities. Although more than 70% of the Earth is covered by ocean, there is limited information on the countless fine- to large-scale water motions taking place within them. This book fills that information gap as the first work that summarizes the state-of-the-art methods and instruments used for surface, subsurface, and abyssal ocean current measurements. Readers of this book will find a wealth of information on Lagrangian measurements, horizontal mapping, imaging, Eulerian measurements, and vertical profiling techniques. In addition, the book describes modern technologies for remote measurement of ocean currents and their signatures, including HF Doppler radar systems, satellite-borne sensors, ocean acoustic tomography, and more. Crucial aspects of ocean currents are described in detail as well, including dispersion of effluents discharged into the sea and transport of beneficial materials—as well as environmentally hazardous materials—from one region to another. The book highlights several important practical applications, showing how measurements relate to climate change and pollution levels, how they affect coastal and offshore engineering activities, and how they can aid in tsunami detection. Coverage of measurement, mapping and profiling techniques Descriptions of technologies for remote measurement of ocean currents and their signatures Reviews crucial aspects of ocean currents, including special emphasis on the planet-spanning thermohaline circulation, known as the ocean's "conveyor belt," and its crucial role in climate change

Ocean Acoustic Tomography

Ocean Acoustic Tomography
Author: Walter Munk,Peter Worcester,Carl Wunsch
Publsiher: Cambridge University Press
Total Pages: 456
Release: 2009-07-02
ISBN 10: 9780521115360
ISBN 13: 0521115361
Language: EN, FR, DE, ES & NL

Ocean Acoustic Tomography Book Review:

This book provides a comprehensive presentation of the underlying oceanography and mathematics necessary to understand and develop such a system. It covers the forward and inverse tomography problem, as well as numerous models for data interpretation. It also includes an epilogue outlining the history of tomographic techniques.

Theoretical And Computational Acoustics 2001

Theoretical And Computational Acoustics 2001
Author: T F Gao,Qihu Li,Er-chang Shang
Publsiher: World Scientific
Total Pages: 692
Release: 2002-07-25
ISBN 10: 981448847X
ISBN 13: 9789814488471
Language: EN, FR, DE, ES & NL

Theoretical And Computational Acoustics 2001 Book Review:

This book contains 67 papers presented at ICTCA2001. It includes three keynote addresses surveying the frontier developments in computational and theoretical acoustics. The papers cover aero-, seismo- and ocean acoustics, as well as ultrasonics. Computational methods, numerical simulation, theoretical analysis and experimental results are emphasized by different papers.The proceedings have been selected for coverage in:Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)

Theoretical and Computational Acoustics 2001

Theoretical and Computational Acoustics 2001
Author: Er-Chang Shang,Qihu Li,T. F. Gao
Publsiher: World Scientific
Total Pages: 676
Release: 2002
ISBN 10: 9812380124
ISBN 13: 9789812380128
Language: EN, FR, DE, ES & NL

Theoretical and Computational Acoustics 2001 Book Review:

This book contains 67 papers presented at ICTCA2001. It includes three keynote addresses surveying the frontier developments in computational and theoretical acoustics. The papers cover aero-, seismo- and ocean acoustics, as well as ultrasonics. Computational methods, numerical simulation, theoretical analysis and experimental results are emphasized by different papers.

Sounds in the Sea

Sounds in the Sea
Author: Herman Medwin
Publsiher: Cambridge University Press
Total Pages: 643
Release: 2005-07-21
ISBN 10: 9780521829502
ISBN 13: 052182950X
Language: EN, FR, DE, ES & NL

Sounds in the Sea Book Review:

Publisher Description

Experimental Acoustic Inversion Methods for Exploration of the Shallow Water Environment

Experimental Acoustic Inversion Methods for Exploration of the Shallow Water Environment
Author: Andrea Caiti,Jean-Pierre Hermand,Sérgio Jesus,Michael Porter
Publsiher: Springer Science & Business Media
Total Pages: 293
Release: 2012-12-06
ISBN 10: 9401141126
ISBN 13: 9789401141123
Language: EN, FR, DE, ES & NL

Experimental Acoustic Inversion Methods for Exploration of the Shallow Water Environment Book Review:

In recent years, research on acoustic remote sensing of the ocean has evolved considerably, especially in studying complex physical and biological processes in shallow water environments. To review the state of the art, an international workshop was held at Carvoeiro, Portugal, in March 1999, bringing together leading international researchers in the field. In contrast to much of the recent theoretical work, emphasis was placed on the experimental validation of the techniques. This volume, based on presentations at this workshop, summarizes a range of diverse and innovative applications. The invited contributions explore the use of acoustics to measure bottom properties and morphology, as well as to probe buried objects within the sediment. Within the water column, sound is applied to imaging of oceanographic features such as currents and tides or monitoring of marine life. Another key theme is the use of sound to solve geometric inverse problems for precise tracking of undersea vehicles. Audience: This volume should be useful both to the novice seeking an introduction to the field and to advanced researchers interested in the latest developments in acoustic sensing of the ocean environment. The workshop was sponsored by the Fundação para a Ciêcia e a Tecnologia (Portuguese Foundation for Science and Technology).

Fundamentals of Shallow Water Acoustics

Fundamentals of Shallow Water Acoustics
Author: Boris Katsnelson,Valery Petnikov,James Lynch
Publsiher: Springer Science & Business Media
Total Pages: 540
Release: 2012-02-22
ISBN 10: 1441997768
ISBN 13: 9781441997760
Language: EN, FR, DE, ES & NL

Fundamentals of Shallow Water Acoustics Book Review:

Shallow water acoustics (SWA), the study of how low and medium frequency sound propagates and scatters on the continental shelves of the worlds oceans, has both technical interest and a large number of practical applications. Technically, shallow water poses an interesting medium for the study of acoustic scattering, inverse theory, and propagation physics in a complicated oceanic waveguide. Practically, shallow water acoustics has interest for geophysical exploration, marine mammal studies, and naval applications. Additionally, one notes the very interdisciplinary nature of shallow water acoustics, including acoustical physics, physical oceanography, marine geology, and marine biology. In this specialized volume the authors, all of whom have extensive at-sea experience in US and Russian research efforts, have tried to summarize the main experimental, theoretical, and computational results in shallow water acoustics, with an emphasis on providing physical insight into the topics presented.

Full Field Inversion Methods in Ocean and Seismo Acoustics

Full Field Inversion Methods in Ocean and Seismo Acoustics
Author: Orest Diachok,Andrea Caiti,Peter Gerstoft,Henrik Schmidt
Publsiher: Springer Science & Business Media
Total Pages: 421
Release: 1995-05-31
ISBN 10: 9780792334590
ISBN 13: 0792334590
Language: EN, FR, DE, ES & NL

Full Field Inversion Methods in Ocean and Seismo Acoustics Book Review:

Recent advances in the power of inversion methods, the accuracy of acoustic field prediction codes, and the speed of digital computers have made the full field inversion of ocean and seismic parameters on a large scale a practical possibility. These methods exploit amplitude and phase information detected on hydrophone/geophone arrays, thereby extending traditional inversion schemes based on time of flight measurements. Full field inversion methods provide environmental information by minimising the mismatch between measured and predicted acoustic fields through a global search of possible environmental parameters. Full Field Inversion Methods in Ocean and Seismo-Acoustics is the formal record of a conference held in Italy in June 1994, sponsored by NATO SACLANT Undersea Research Centre. It includes papers by NATO specialists and others. Topics covered include: · speed and accuracy of acoustic field prediction codes · signal processing strategies · global inversion algorithms · search spaces of environmental parameters · environmental stochastic limitations · special purpose computer architectures · measurement geometries · source and receiving sensor technologies.

Monitoring Temperature Variability Along the California Coast Using Acoustic Tomography

Monitoring Temperature Variability Along the California Coast Using Acoustic Tomography
Author: Thierry Morvillez,Naval Postgraduate School (U.S.)
Publsiher: Unknown
Total Pages: 50
Release: 1997
ISBN 10: 1928374650XXX
ISBN 13: OCLC:45520337
Language: EN, FR, DE, ES & NL

Monitoring Temperature Variability Along the California Coast Using Acoustic Tomography Book Review:

The electronic emissions of a low frequency sound source placed by the Acoustic Thermometry of Ocean Climate (ATOC) project on Pioneer Seamount were monitored by a bottom lying receiver on Sur Ridge from April 1996 to February 1997. The processed signals show a stable arrival pattern that was repeated in all the transmissions during the 11 months. Using the processed data, a tomographic analysis to study the coastal ocean variability along this California transmission path was conducted. Systematically, the analysis involved forward acoustic modeling of the arrival structure using ray theory, associating the observed arrivals with the modeled arrivals, extracting the travel times of the arrivals, inverting the travel times for temporal and spatial temperature changes, and interpreting the observed temperature variations. In particular, the tomographic estimate was compared to the temperature and wind measurements from an in situ mooring deployed by the Monterey Bay Aquarium Research Institution (MBARI). The comparison show that the tomographic estimate is of high quality and that the observed temperature variations were linked to coastal upwelling and downwelling events. The data, methods and result, demonstrating fully the feasibility of using tomography to study coastal temperature variability in central California on a long term basis, are presented.

Seventy Years of Exploration in Oceanography

Seventy Years of Exploration in Oceanography
Author: Klaus Hasselmann
Publsiher: Springer Science & Business Media
Total Pages: 137
Release: 2010-04-08
ISBN 10: 3642120873
ISBN 13: 9783642120879
Language: EN, FR, DE, ES & NL

Seventy Years of Exploration in Oceanography Book Review:

It all began with Markus Jochum approaching one of us (HvS) – “when you guys are doing interviews with senior scientists from oceanography and related sciences, why are you not doing Walter Munk?” Indeed, why not? Walter Munk, an icon in oceanography, had just given a wonderful talk in a symposium in honor of his 90th birthday, sweeping a grand circle from his earliest work with Chip Cox on airborne measurements of ocean surface roughness to the latest satellite data – not simply a review, but the struggle of an active scientist opening up new perspectives – as inspiring and stimulating as when one of us (KH) rst met him at the Ocean Waves Conference in Easton in 1961 (Fig. I. 1). Walter immediately agreed to share with us his recollections on the nearly seventy years of his path-breaking contributions in a sheer amazing range of topics, from ocean waves, internal waves, ocean currents, tides, tsunamis, sea level, microseisms and the rotation of the earth to ocean acoustic tomography. With “you guys” Markus was referring to HvS and the various partners HvS had 1 invited to join him in conducting a series of interviews of retired colleagues.

Ocean Noise and Marine Mammals

Ocean Noise and Marine Mammals
Author: National Research Council,Division on Earth and Life Studies,Ocean Studies Board,Committee on Potential Impacts of Ambient Noise in the Ocean on Marine Mammals
Publsiher: National Academies Press
Total Pages: 220
Release: 2003-06-22
ISBN 10: 0309085365
ISBN 13: 9780309085366
Language: EN, FR, DE, ES & NL

Ocean Noise and Marine Mammals Book Review:

For the 119 species of marine mammals, as well as for some other aquatic animals, sound is the primary means of learning about the environment and of communicating, navigating, and foraging. The possibility that human-generated noise could harm marine mammals or significantly interfere with their normal activities is an issue of increasing concern. Noise and its potential impacts have been regulated since the passage of the Marine Mammal Protection Act of 1972. Public awareness of the issue escalated in 1990s when researchers began using high-intensity sound to measure ocean climate changes. More recently, the stranding of beaked whales in proximity to Navy sonar use has again put the issue in the spotlight. Ocean Noise and Marine Mammals reviews sources of noise in the ocean environment, what is known of the responses of marine mammals to acoustic disturbance, and what models exist for describing ocean noise and marine mammal responses. Recommendations are made for future data gathering efforts, studies of marine mammal behavior and physiology, and modeling efforts necessary to determine what the long- and short-term impacts of ocean noise on marine mammals.

Estuarine and Coastal Hydrography and Sediment Transport

Estuarine and Coastal Hydrography and Sediment Transport
Author: R. J. Uncles,S. B. Mitchell
Publsiher: Cambridge University Press
Total Pages: 366
Release: 2017-08-17
ISBN 10: 1107040981
ISBN 13: 9781107040984
Language: EN, FR, DE, ES & NL

Estuarine and Coastal Hydrography and Sediment Transport Book Review:

A practical guide to the latest techniques to measure sediments, seabed, water and transport mechanisms in estuaries and coastal waters. Covering a broad range of topics, enough background is included to explain how each technology functions. A review of recent fieldwork experiments demonstrates how modern methods apply in real-life scenarios.

Compilation of Theses Abstracts October 1994 September 1995

Compilation of Theses Abstracts  October 1994 September 1995
Author: United States. Naval Postgraduate School, Monterey, CA.
Publsiher: Unknown
Total Pages: 483
Release: 1995
ISBN 10: 1928374650XXX
ISBN 13: UCSC:32106014454703
Language: EN, FR, DE, ES & NL

Compilation of Theses Abstracts October 1994 September 1995 Book Review:

Theoretical And Computational Acoustics Proceedings Of The International Conference In 2 Volumes

Theoretical And Computational Acoustics   Proceedings Of The International Conference  In 2 Volumes
Author: Williams John E Ffowcs,Lee Ding,Pierce Allan D
Publsiher: World Scientific
Total Pages: 1024
Release: 1994-10-25
ISBN 10: 9814551724
ISBN 13: 9789814551724
Language: EN, FR, DE, ES & NL

Theoretical And Computational Acoustics Proceedings Of The International Conference In 2 Volumes Book Review:

Meeting of the United States Japan Cooperative Program in Natural Resources UJNR Panel on Marine Facilities

Meeting of the United States Japan Cooperative Program in Natural Resources  UJNR  Panel on Marine Facilities
Author: United States-Japan Cooperative Program in Natural Resources. Panel on Marine Facilities. Meeting
Publsiher: Unknown
Total Pages: 135
Release: 1994
ISBN 10: 1928374650XXX
ISBN 13: UCSD:31822009772070
Language: EN, FR, DE, ES & NL

Meeting of the United States Japan Cooperative Program in Natural Resources UJNR Panel on Marine Facilities Book Review:

Shallow Water Acoustics

Shallow Water Acoustics
Author: Boris G. Katsnelson,Valery G. Petnikov
Publsiher: Springer Science & Business Media
Total Pages: 267
Release: 2002-05-01
ISBN 10: 9783540426448
ISBN 13: 3540426442
Language: EN, FR, DE, ES & NL

Shallow Water Acoustics Book Review:

The objective of this book is to present the main theoretical approaches and models in shallow water acoustics as well as different experimental results. The focus is primarily concentrated on physical results describing the sound field in wave length. The authors show dynamic phenomena (tides, internal waves) from the perspective of acoustic influence as well as the scattering of sound over the macroscopic body in shallow water waveguide. The method of acoustic probing can be used by physicists, geophysicists, geologists and oceanographers.