Download or read book Analysis of M2 Tidal Signatures in Synthetic Aperture Radar Images of Delaware Bay written by Gustavo Henrique Oliveira and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The satellite-based Synthetic Aperture Radar (SAR) is a high resolution sensor which provides synoptic views of several oceanic processes such as surface and internal gravity waves, density fronts, and shallow water bathymetry. This type of sensor is particularly useful in coastal areas where high resolution is required. However, archived datasets of satellite-based SAR imagery are severely limited by the long gaps between consecutive images which do not allow traditional time series analysis. In order to overcome some of the temporal limitation of available datasets, a method for tidal analysis of SAR images was proposed. The method is based on the assumption that, in coastal areas tides are the strongest and most repetitive forcing known to affect ocean processes detectable by radars. Using RADARSAT-1 SAR images of the mouth of Delaware Bay and harmonic analysis parameters, the M2 tidal modulation of density fronts and bottom topography was studied. The M2 tidal variability of frontal signatures agreed well with previous results based on high resolution in-situ sampling. The M2 tidal signatures associated with two prominent topographical features on the mouth of the Delaware Bay were analyzed separately. The radar signature which has been previously interpreted as a counter-intuitive jet is shown here to be associated with the Hen and Chickens Shoal. The radar signature of the Prissy Wicks Shoals presented the clearest M2 modulation but it is affected by local enhanced wave-breaking independently detected in high resolution aerial photography. The method developed in this studied was compared to ideal and realistic numerical simulations of radar imaging of the Prissy Wicks Shoal. In the ideal scenario, in which the wind and radar parameters were kept constant, the predicted backscattering across the shoals showed a complete M2 tidal oscillation. In the realistic scenario only one parameter was kept constant while others were allowed to vary. When incidence angle was kept constant the M2 oscillation in the backscattering signal was not predicted during the entire tidal period. Similarly it was not possible to observe the M2 fluctuation using RADARSAT-1 data. However, when wind direction was kept constant the M2 oscillation was predicted for part of the tidal period. A M2 oscillation was also observed in RADARSAT-1 data but for an even shorter duration. Based on the radar imaging simulations it is suggested that the M2 backscattering oscillations cannot be clearly observed in RADARSAT-1 SAR image because of a combined effect of speckle, variable wind direction, and other processes not included in the model, such as wave-breaking fronts. Continuous airborne radar surveys could provide more insights into this apparent limitation. It would be particularly important to choose areas with an even number of crosswind/upwind conditions, thus providing more information on the directionality aspects of radar imaging of wave-current interaction. This research showed some of the limitations that need to be overcome before analyzing archived datasets of satellite-based SAR imagery.
Download or read book Analysis of the Dynamics of Tidal Flats Using Synthetic Aperture Radar Imaging written by and published by . This book was released on 2009 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The specific scientific objectives of this study, to be carried out in collaboration with the Tidal Flat investigators, are: a) To describe the geomorphologic changes using historical satellite imagery. b) To improve our understanding of the dynamics of tidal flats during various phases of the tidal cycle using satellite SAR image data. c) Support the on-going experimental measurement phases with new satellite data acquisitions. d) To determine how SAR signatures can be related to the sedimentary and geotechnical properties of the tidal flat. e) To generate high resolution wind maps for improved understanding of the wind forcing variability and turbulence over tidal flats. f) To provide spatial snapshots of the dynamics during the flooding and ebbing stages governing tidal flats. g) Radar imaging of the wave field and translation of the images into snapshots of?elevation maps" of the surface using both satellite and ship or floating platform based sensors. h) Measurements of the wave field and the atmosphere above the wave field using ASIS buoys to generate data sets that could be compared to wave models and radar both in the spectral and phase-resolved domains, and leads to a better understanding how the wind profile, fluxes, coefficient of drag vary with respect to differing wind and wave conditions. i) Measurements of breaking using acoustic and microwave means as well as in-situ sensors locally.
Download or read book Computer Analysis of Coastal Ocean Features in Synthetic Aperture Radar Imagery written by Gary A. Mastin and published by . This book was released on 1983 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract.
Download or read book 1994 Ocean Sciences Meeting written by and published by . This book was released on 1994 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geotitles written by and published by . This book was released on 1991 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Tidal Sedimentology written by Richard A. Davis Jr. and published by Springer Science & Business Media. This book was released on 2011-10-20 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive, contemporary review of tidal environments and deposits. Individual chapters, each written by world-class experts, cover the full spectrum of coastal, shallow-marine and even deep-marine settings where tidal action influences or controls sediment movement and deposition. Both siliciclastic and carbonate deposits are covered. Various chapters examine the dynamics of sediment transport by tides, and the morphodynamics of tidal systems. Several chapters explore the occurrence of tidal deposits in the stratigraphic context of entire sedimentary basins. This book is essential reading for both coastal geologists and managers, and geologists interested in extracting hydrocarbons from complex tidal successions.
Download or read book Remote Sensing Handbook for Tropical Coastal Management written by Edmund Peter Green and published by Unesco. This book was released on 2000 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook provides a detailed evaluation of what can realistically be achieved by remote sensing in an operational coastal management context. It takes the user through the planning and implementation of remote sensing projects from the setting of realistic objectives, deciding which imagery will be most appropriate to achieve those objectives, the acquisition, geometric and radiometric correction of imagery, the field survey methods needed to ground-truth the imagery and guide image classification, the image processing techniques required to optimise outputs, through the image interpretation and evaluation of the accuracy of outputs. Linked to the Handbook is a computer-based remote sensing distance-learning module: Applications of satellite and airborne image data to coastal management available free of charge via www.unesco.bilko.org
Download or read book Remote Sensing of Wetlands written by Ralph W. Tiner and published by CRC Press. This book was released on 2015-03-23 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effectively Manage Wetland Resources Using the Best Available Remote Sensing TechniquesUtilizing top scientists in the wetland classification and mapping field, Remote Sensing of Wetlands: Applications and Advances covers the rapidly changing landscape of wetlands and describes the latest advances in remote sensing that have taken place over the pa
Download or read book Mangrove Ecosystems A Global Biogeographic Perspective written by Victor H. Rivera-Monroy and published by Springer. This book was released on 2017-11-03 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview and analysis of mangrove ecological processes, structure, and function at the local, biogeographic, and global scales and how these properties interact to provide key ecosystem services to society. The analysis is based on an international collaborative effort that focuses on regions and countries holding the largest mangrove resources and encompasses the major biogeographic and socio-economic settings of mangrove distribution. Given the economic and ecological importance of mangrove wetlands at the global scale, the chapters aim to integrate ecological and socio-economic perspectives on mangrove function and management using a system-level hierarchical analysis framework. The book explores the nexus between mangrove ecology and the capacity for ecosystem services, with an emphasis on thresholds, multiple stressors, and local conditions that determine this capacity. The interdisciplinary approach and illustrative study cases included in the book will provide valuable resources in data, information, and knowledge about the current status of one of the most productive coastal ecosystem in the world.
Download or read book Variations in Earth Rotation written by Dennis D. McCarthy and published by American Geophysical Union. This book was released on 1990 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 59. As part of the Nineteenth General Assembly of The International Union of Geodesy and Geophysics Symposium (IUGG) in Vancouver, Canada, Union Symposium U4, "Variations in Earth Rotation" was held August 18-19 1987. The Convenor was Dennis D. McCarthy, U.S. Naval Observatory with P. Paquet, Observatoire Royal de Belgique and M. G. Rochester, St. Johns University serving as co-convernors. In a session on internal structure of the Earth papers dealt with the geophysical effects on Earth rotation parameters. Mantle anelasticity increases the free core nutation (FCN) period by a few days. The period of the FCN and the amplitudes of the main nutation components are sensitive to the ellipticity of the core?]mantle boundary (CMB), and a non-hydrostatic increase of 400m in the flattening of the CMB is a possible explanation of the discrepancies from theory. An alternative suggestion rests on the subseismic description of the nutation spectrum of the stratified liquid core. Evidently new models will have to take into account contributions from the oceans, mantle anelasticity, non-hydrostatic pre-stress, CMB topography and internal core structure.
Download or read book The Port of Portland Maine written by and published by . This book was released on 1937 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Remote Sensing Digital Image Analysis written by John A. Richards and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the widespread availability of satellite and aircraft remote sensing image data in digital form, and the ready access most remote sensing practitioners have to computing systems for image interpretation, there is a need to draw together the range of digital image processing procedures and methodologies commonly used in this field into a single treatment. It is the intention of this book to provide such a function, at a level meaningful to the non-specialist digital image analyst, but in sufficient detail that algorithm limitations, alternative procedures and current trends can be appreciated. Often the applications specialist in remote sensing wishing to make use of digital processing procedures has had to depend upon either the mathematically detailed treatments of image processing found in the electrical engineering and computer science literature, or the sometimes necessarily superficial treatments given in general texts on remote sensing. This book seeks to redress that situation. Both image enhancement and classification techniques are covered making the material relevant in those applications in which photointerpretation is used for information extraction and in those wherein information is obtained by classification.
Download or read book Marine Surface Films written by Martin Gade and published by Springer. This book was released on 2010-10-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the late 1960s, various groups have investigated the influence of marine surface films on mechanisms dominating energy and mass transfer across the ocean/atmosphere interface. However, a compendium summarizing the state-of-the-art research in this field is still missing. The book fills this gap and transfers the accumulated knowledge to the scientific community. After a brief historical chapter basic chemical insights are presented, followed by theoretical and experimental approaches carried out in laboratory facilities. Air-sea interaction experiments are then described and finally, remote sensing applications with sea slicks and crude oil spills are presented.
Download or read book Remote Sensing of Coastal Aquatic Environments written by Richard L. Miller and published by Springer Science & Business Media. This book was released on 2007-03-22 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides extensive insight on remote sensing of coastal waters from aircraft and space-based platforms. The primary focus of the book is optical remote sensing using passive instruments, to measure and analyze the coastal aquatic environment. The authors have gathered information from a variety of sources, to help non-specialists grasp new techniques and technology, to quickly produce useful data
Download or read book Real time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms written by Babin, Marcel and published by UNESCO. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.
Download or read book Coastal Hazards written by Charles W. Finkl and published by Springer Science & Business Media. This book was released on 2012-12-11 with total page 839 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the gamut of coastal hazards that result from short-term low-frequency events and have high-magnitude and far-reaching impacts on coastal zones the world over. Much of the world’s population now lives in low-lying coastal zones that are inherently vulnerable to natural hazards such as flooding from hurricanes, tropical storms and northeastern storm surges; shoreline (beach and dune) erosion; cliff and bluff failures; and saltwater intrusion in coastal aquifers used for drinking water supplies. In addition to the usual range of hydrometeorological disasters in coastal zones, this book covers tsunami impacts and warning systems as well as global perspectives of sea-level rise impacts and human perceptions of potential vulnerabilities resulting from rip currents that cause many drownings each year on beaches. Today, the use of numerical models that help predict vulnerabilities and provide a basis for shore protection measures is important in modern scientific and engineering systems. Final considerations focus on human actions in the form of the urbanization and industrialization of the coast, shore protection measures, and indicate how environmental degradation around coastal conurbations exacerbates the potential for unwanted impacts. Strategies for environmental management in coastal zones, from low-lying wetlands to high cliffs and rocky promontories, are highlighted as a means of living in harmony with Nature and not trying to conquer it.
Download or read book Nonlinear Dynamics in Geosciences written by Anastasios A. Tsonis and published by Springer Science & Business Media. This book was released on 2007-10-23 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work comprises the proceedings of a conference held last year in Rhodes, Greece, to assess developments during the last 20 years in the field of nonlinear dynamics in geosciences. The volume has its own authority as part of the Aegean Conferences cycle, but it also brings together the most up-to-date research from the atmospheric sciences, hydrology, geology, and other areas of geosciences, and discusses the advances made and the future directions of nonlinear dynamics.
