Download or read book Thresholds of Barrier Island Change written by Jessica L Raff and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The barrier islands and backbarrier marshes and bays of Virginia’s Eastern Shore are one of the largest undeveloped barrier-island systems in the US, and are currently threatened by sea-level rise, storms, and changing sediment supply. This research presents insights into the evolutionary and developmental history of Parramore Island, one of the largest – and commonly assumed to be most stable – of these islands. Stratigraphic (vibracores, auger cores), geospatial (historical maps, aerial imagery, t- sheets, LiDAR), and chronological (optically stimulated luminescence [OSL], radiocarbon) data reveal that Parramore has alternated between periods of landward migration and seaward progradation several times during the past 1000 years. Radiocarbon dates, stratigraphic data, and historical maps illustrate that Parramore Island was three discrete islands experiencing overwash-driven retrogradation as recently as 977 ± 144 BP. Dates provided by OSL analyses indicate the progradational ridges overlying and seaward of these washovers are only 140 – 560 years old. This confirms that the progradational beach and dune ridge system forming the core of Parramore Island is much younger than those on similar barriers elsewhere along the Mid-Atlantic coast. Over the last ca. 200 years, individual proto-barrier islands prograded, forcing inlet closure and development of a shallow beach ridge and swale system landward of central and southern Parramore. Remnants of higher ridges are subaerially exposed and vegetated in the form of Little Beach, Revels Island, smaller ridges along the western edge of Parramore, and dissected ridges in the form of so-called “Pimpled Mounds” west of the modern foredune. Lower ridges and swales have been inundated by rising sea level and are covered by thin (m), young (commonlyold) marsh that has migrated upland into the interior of the barrier island. These data indicate that Parramore has only existed in its present form for ca. 200 years. Moreover, a recent shift to rapid erosion – and consequent perceived “rotation” of the island – along much of its length (at an island-average rate ~12 m/yr since 1980), suggest that the apparent robustness and stability of Parramore are ephemeral features of a rapidly changing barrier island. The modern island may be undergoing a transition from erosion to a period of landward parallel-retreat, potentially due to a decrease in sediment supply reaching the island from sand trapping at the more northern Fishing Point. If so, Parramore may become the most southerly barrier in the Virginia Eastern Shore’s characteristic “Arc of Erosion”.
Download or read book Thresholds in Geomorphology written by Donald R. Coates and published by Routledge. This book was released on 2020-05-10 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, first published in 1980, is a timely and comprehensive appraisal of thresholds in geomorphology. The papers, arising from the 9th Binghamton Geomorphology Symposium, form the cornerstone of a subject that is increasingly important in geomorphology. This book analyses the historical background to thresholds and geomorphology, as well as fluvial landforms, hydrogeologic regimes and other processes, and the impact of man.
Download or read book Groundwater Thresholds for Root Decomposition and the Relation to Barrier Island Ecological State Changes written by Matthew L. Smith and published by . This book was released on 2015 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thresholds of Change in Decomposition Rate Along a Dune swale Transect on a Virginia Barrier Island written by Dominic J. Graziani and published by . This book was released on 2012 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geographical Analysis of Fenwick Island Maryland a Middle Atlantic Coast Barrier Island written by Robert Dolan and published by . This book was released on 1980 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ocean and Cryosphere in a Changing Climate written by Intergovernmental Panel on Climate Change (IPCC) and published by Cambridge University Press. This book was released on 2022-04-30 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Intergovernmental Panel on Climate Change (IPCC) is the leading international body for assessing the science related to climate change. It provides policymakers with regular assessments of the scientific basis of human-induced climate change, its impacts and future risks, and options for adaptation and mitigation. This IPCC Special Report on the Ocean and Cryosphere in a Changing Climate is the most comprehensive and up-to-date assessment of the observed and projected changes to the ocean and cryosphere and their associated impacts and risks, with a focus on resilience, risk management response options, and adaptation measures, considering both their potential and limitations. It brings together knowledge on physical and biogeochemical changes, the interplay with ecosystem changes, and the implications for human communities. It serves policymakers, decision makers, stakeholders, and all interested parties with unbiased, up-to-date, policy-relevant information. This title is also available as Open Access on Cambridge Core.
Download or read book Abrupt Impacts of Climate Change written by National Research Council and published by National Academies Press. This book was released on 2013-12-31 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate is changing, forced out of the range of the past million years by levels of carbon dioxide and other greenhouse gases not seen in the Earth's atmosphere for a very, very long time. Lacking action by the world's nations, it is clear that the planet will be warmer, sea level will rise, and patterns of rainfall will change. But the future is also partly uncertain-there is considerable uncertainty about how we will arrive at that different climate. Will the changes be gradual, allowing natural systems and societal infrastructure to adjust in a timely fashion? Or will some of the changes be more abrupt, crossing some threshold or "tipping point" to change so fast that the time between when a problem is recognized and when action is required shrinks to the point where orderly adaptation is not possible? Abrupt Impacts of Climate Change is an updated look at the issue of abrupt climate change and its potential impacts. This study differs from previous treatments of abrupt changes by focusing on abrupt climate changes and also abrupt climate impacts that have the potential to severely affect the physical climate system, natural systems, or human systems, often affecting multiple interconnected areas of concern. The primary timescale of concern is years to decades. A key characteristic of these changes is that they can come faster than expected, planned, or budgeted for, forcing more reactive, rather than proactive, modes of behavior. Abrupt Impacts of Climate Change summarizes the state of our knowledge about potential abrupt changes and abrupt climate impacts and categorizes changes that are already occurring, have a high probability of occurrence, or are unlikely to occur. Because of the substantial risks to society and nature posed by abrupt changes, this report recommends the development of an Abrupt Change Early Warning System that would allow for the prediction and possible mitigation of such changes before their societal impacts are severe. Identifying key vulnerabilities can help guide efforts to increase resiliency and avoid large damages from abrupt change in the climate system, or in abrupt impacts of gradual changes in the climate system, and facilitate more informed decisions on the proper balance between mitigation and adaptation. Although there is still much to learn about abrupt climate change and abrupt climate impacts, to willfully ignore the threat of abrupt change could lead to more costs, loss of life, suffering, and environmental degradation. Abrupt Impacts of Climate Change makes the case that the time is here to be serious about the threat of tipping points so as to better anticipate and prepare ourselves for the inevitable surprises.
Download or read book The Outer Banks of North Carolina written by Robert Dolan and published by . This book was released on 1985 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Barrier Dynamics and Response to Changing Climate written by Laura J. Moore and published by Springer. This book was released on 2018-01-17 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents chapters, written by leading coastal scientists, which collectively depict the current understanding of the processes that shape barrier islands and barrier spits, with an emphasis on the response of these landforms to changing conditions. A majority of the world’s population lives along the coast at the dynamic intersection between terrestrial and marine ecosystems and landscapes. As narrow, low-lying landforms, barriers are especially vulnerable to changes in sea level, storminess, the geographic distribution of grass species, and the rate of sand supply—some barriers will undergo rapid changes in state (e.g., from landward migrating to disintegrating), on human time scales. Attempts by humans to prevent change can hasten the loss of these landforms, threatening their continued existence as well as the recreational, financial and ecosystem service benefits they provide. Understanding the processes and interactions that drive landscape response to climate change and human actions is essential to adaptation. As managers and governments struggle to plan for the future along low-lying coasts worldwide, and scientists conduct research that provides useful guidance, this volume offers a much-needed compilation for these groups, as well as a window into the science of barrier dynamics for anyone who is generally interested in the impacts of a changing world on coastal environments.
Download or read book Sea Level Rise for the Coasts of California Oregon and Washington written by National Research Council and published by National Academies Press. This book was released on 2012-12-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tide gauges show that global sea level has risen about 7 inches during the 20th century, and recent satellite data show that the rate of sea-level rise is accelerating. As Earth warms, sea levels are rising mainly because ocean water expands as it warms; and water from melting glaciers and ice sheets is flowing into the ocean. Sea-level rise poses enormous risks to the valuable infrastructure, development, and wetlands that line much of the 1,600 mile shoreline of California, Oregon, and Washington. As those states seek to incorporate projections of sea-level rise into coastal planning, they asked the National Research Council to make independent projections of sea-level rise along their coasts for the years 2030, 2050, and 2100, taking into account regional factors that affect sea level. Sea-Level Rise for the Coasts of California, Oregon, and Washington: Past, Present, and Future explains that sea level along the U.S. west coast is affected by a number of factors. These include: climate patterns such as the El Niño, effects from the melting of modern and ancient ice sheets, and geologic processes, such as plate tectonics. Regional projections for California, Oregon, and Washington show a sharp distinction at Cape Mendocino in northern California. South of that point, sea-level rise is expected to be very close to global projections. However, projections are lower north of Cape Mendocino because the land is being pushed upward as the ocean plate moves under the continental plate along the Cascadia Subduction Zone. However, an earthquake magnitude 8 or larger, which occurs in the region every few hundred to 1,000 years, would cause the land to drop and sea level to suddenly rise.
Download or read book Coastal Sensitivity to Sea level Rise written by and published by Climate Change Science Program. This book was released on 2009 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of 21 climate change synthesis and assessment products commissioned by the U.S. Climate Change Science Program (CCSP), this report examines the effects of sea level rise, impacts on society, and opportunities to prepare for those consequences, focusing on the eight coastal states from New York to North Carolina. Using scientific literature and policy documents, the report describes potential changes to barrier.
Download or read book Species Conservation and Management written by H. Resit Akcakaya and published by Oxford University Press. This book was released on 2004-10-07 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume is a collection of population and metapopulation models for a wide variety of species, including plants, invertebrates, fishes, amphibians, reptiles, birds, and mammals. Each chapter of the book describes the application of RAMAS GIS 4.0 to one species, with the aim of demonstrating how various life history characteristics of the species are incorporated into the model, and how the results of the model has been or can be used in conservation and management of the species. The book comes with a CD that includes a demo version of the program, and the data files for each species.
Download or read book Proposed Changes to the Coastal Barrier Resources System written by and published by . This book was released on 1988 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hierarchy written by T. F. H. Allen and published by University of Chicago Press. This book was released on 2017-11-15 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although complexity surrounds us, its inherent uncertainty, ambiguity, and contradiction can at first make complex systems appear inscrutable. Ecosystems, for instance, are nonlinear, self-organizing, seemingly chaotic structures in which individuals interact both with each other and with the myriad biotic and abiotic components of their surroundings across geographies as well as spatial and temporal scales. In the face of such complexity, ecologists have long sought tools to streamline and aggregate information. Among them, in the 1980s, T. F. H. Allen and Thomas B. Starr implemented a burgeoning concept from business administration: hierarchy theory. Cutting-edge when Hierarchy was first published, their approach to unraveling complexity is now integrated into mainstream ecological thought. This thoroughly revised and expanded second edition of Hierarchy reflects the assimilation of hierarchy theory into ecological research, its successful application to the understanding of complex systems, and the many developments in thought since. Because hierarchies and levels are habitual parts of human thinking, hierarchy theory has proven to be the most intuitive and tractable vehicle for addressing complexity. By allowing researchers to look explicitly at only the entities and interconnections that are relevant to a specific research question, hierarchically informed data analysis has enabled a revolution in ecological understanding. With this new edition of Hierarchy, that revolution continues.
Download or read book The Proceedings of the Coastal Sediments 2011 written by Ping Wang and published by World Scientific. This book was released on 2011-01-01 with total page 921 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings contains nearly 200 papers on cutting-edge research presented at the seventh international Symposium on Coastal Engineering and Science of Coastal Sediment Processes, held May 26, 2011, in Miami, Florida, USA. This technical specialty conference was devoted to promoting an interdisciplinary exchange of state-of-the-art knowledge among researchers in the fields of coastal engineering, geology, oceanography, and related disciplines, with a theme of bringing together theory and practice. Focusing on the physical aspects of sediment processes in various coastal environments, this three-volume conference proceedings provides findings from the latest research and newest engineering applications. Session topics cover a wide range including barrier-island morphodynamics and evolution, beach nourishment and shore protection, coastal dunes, cohesive sediment transport, field and laboratory measurements of sediment transport processes and numerical modeling, gravel transport, large-scale and long-term coastal changes, LiDAR and remote sensing, longshore and cross-shore sediment transport, marsh and wetlands, regional sediment management, river deltas, sea-level changes, shelf and sand bodies, shoreline changes, tidal inlets and navigation channels. A special session on recent research findings at the Northern Gulf of Mexico is also included.
Download or read book Alternative Policies for Protecting Barrier Islands Along the Atlantic and Gulf Coasts of the United States and Draft Environmental Statement written by and published by . This book was released on 1979 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
