Download or read book Peat Records of Late Holocene Climate and Sea level Change in South Florida written by Samantha W. Kaplan and published by . This book was released on 2003 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extension of the Late Holocene Sea level Record in North Carolina USA written by Jessica Kegel and published by . This book was released on 2015 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Future sea-level rise will dramatically affect coastal landscapes and populations. The coast of North Carolina (USA) is particularly vulnerable to sea-level rise because its low-lying coastal plain is expansive, has a low gradient, provides significant ecosystem services and is economically important. In order to understand how future sea-level rise may affect the coast, it is necessary to study past sea-level rise. Widespread salt-marshes compose much of North Carolina's coastal system, providing an excellent environment from which to produce relative sea-level reconstructions using salt-marsh foraminifera, whose distribution is controlled by tidal elevation. Distinctive assemblage zones related to different tidal ranges can be recognized in salt-marsh foraminiferal assemblages, allowing them to be used as a proxy for reconstructing sea level as sea-level indicators. Foraminiferal assemblages from surface samples along two transects at Sand Hill Point on Cedar Island, North Carolina added to an existing modern training set of paired observations of foraminiferal assemblages and tidal elevation; these data provide local analogues for interpreting fossil assemblages using a locally weighted-weighted average (LWWA) regression model. Foraminiferal assemblages preserved in a radiocarbon-dated core of salt-marsh peat from Sand Hill Point were used to produce a continuous, high-resolution late Holocene relative sea-level reconstruction. The existing late Holocene RSL reconstruction from North Carolina is based on two sites: Sand Point on Roanoke Island and Tump Point on Cedar Island. The Sand Point record spans the last ~2200 years, but the Tump Point record spans only the last ~1000 years. Therefore, the sea-level history described from 200 BC to 1000 AD is based on only one site. The new sea-level reconstruction from Sand Hill Point extends the existing record from nearby Tump Point, NC by 1400 years, producing a high resolution, continuous record of sea-level change spanning 1500 BC - 1915 AD. This new record tests whether patterns and rates of late Holocene sea-level changes reconstructed elsewhere in North Carolina are consistent throughout the region. The calculated average rate of relative sea-level rise for Sand Hill Point of 0.7 mm/year is consistent with patterns of regional rates along the US Atlantic coast, which may be partly attributed to isostatic response to deglaciation of the Laurentide Ice Sheet.
Download or read book Climate Change and Sea Level Rise in South Florida written by Risa Palm and published by Springer Nature. This book was released on 2020-01-01 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: South Florida is frequently cited as the part of the United State of America as most susceptible to the devastation accompanying sea level rise. Several scholarly studies have shown the negative impact of coastal location in Florida on housing values. Are the residents of South Florida concerned? Is susceptibility to sea level rise actually affecting the housing market in terms of demand, the availability of home mortgages, or house prices? Are people living at particular risk from sea level rise aware of this risk and more open to new information about climate change? Do they support policies and laws to mitigate the pace and extent of climate change? Answers to these questions are not only of general interest, but they are also key to our understanding of the human dimensions of this problem. This book describes the results of a detailed survey in which respondents viewed a local map displaying flooding to their own community that would result from a Category 3 hurricane in 2033. It discusses political party identification and ideology that has an overwhelming impact in shaping views about sea level rise and climate change. This book has enormous implications for the effectiveness of communicating risk information. The text is important if we, as a nation, are to design communication strategies that will lead to broader policy to combat or mitigate this risk.
Download or read book Relative Rise in Sea level During the Late Holocene at Six Salt Marshes in the Puget Basin Washington written by Harriet Guthrie Beale and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Relative sea-level changes during the past several thousand years were determined at six marshes in three areas of the Puget Basin, Washington, to identify sites of vertical crustal movement, to provide data on regional relative sea-level history, and to collect data that may be used to monitor a proposed acceleration in the rate of eustatic sea-level rise due to global warming. Six salt marshes were cored to obtain radiocarbon ages of basal fossil peat deposits. Uncertainty in relating fossil marsh plants to elevations of former sea-levels reflects both the vertical range in which the plants occur today at the six study sites, and the responses of salt marshes to the variations in tidal range that accompany rising sea-levels. Stratigraphic analysis reveals a rise in relative sealevel at all sites. Radiocarbon ages of peat samples indicate a relative sea-level rise of approximately 2-3 ± 0.5 m between 5000 and 3000 years ago and approximately 1 _+ 0.5 m between 3000 and 1000 years ago. Relative sea-level in the Puget Basin has probably not risen more than about 1 m in the past 1000 years. These data correlate with those of previous studies from southeastern Vancouver Island and the Fraser Lowland. No conclusive evidence of either sudden crustal subsidence or differential tilting across the region was found at the six marshes examined, although slow, steady subsidence of the forearc basin of the Cascadia subduction zone may account for some of the apparent eustatic sea-level rise. Differential crustal displacements of more than 1 m have probably not occurred at Padilla Bay in the past 4500 years, at Quilcene Bay in the past 3000 years, and on San Juan Island in the past 800 years. Should an acceleration in the rate of sea-level rise from global warming be in progress, erosion observed at marshes on San Juan Island may represent an early signalj Coastal areas with the greatest vulnerability to an accelerated sea-level rise, however, are in southern and eastern Puget Sound, where larger tidal ranges would register the greatest increases in amplitude, so that the highest tides would reach even higher elevations than those otherwise expected for the predicted sea-level rise.
Download or read book World Atlas of Holocene Sea Level Changes written by J. Pluet and published by Elsevier. This book was released on 1991-11-20 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely study is concerned with the current record of sea-level changes during the past 10,000 years; their rates, and our ability to estimate these changes accurately. The author begins with an extensive introduction to the subject, covering the historical background and the possible causes of sea-level changes and the main methods used to reconstruct former sea-level positions. The second and main part of the Atlas provides a worldwide review of Holocene sea level changes by assembling some 800 local relative sea-level curves, deduced from field data from all parts of the world, and comparing these with over 100 curves predicted by geophysical models. This data is compiled in 77 regional plates, each containing 4-20 relative sea-level curves drawn to the same scale. These plates enable a visual assessment of geological trends in sea-level during the Holocene to be made. Comparing this data with trends deduced from tide gauges and near-future trends predicted by climate models, should enable more accurate assessment of near future sea-level changes on a local scale. The regional plates are fully annotated with locations, authors' names, year of publication and some indicative values of the spring tidal range in the region, as well as an accompanying text of comments. Finally, the author provides a state of the art review, proposes improvements in methodology and suggests directions for further study. An extensive bibliography of over 750 references, and two indexes complete the study. This comprehensive work contains data and interpretations of value to all those with an interest in regional geography, climatology, sea-level change, and environmental science.
Download or read book Holocene Cycles written by Charles W. Finkl and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gulf of Mexico Origin Waters and Biota written by Noreen A. Buster and published by Texas A&M University Press. This book was released on 2011-05-30 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 3 of Gulf of Mexico Origin, Waters, and Biota; a series edited by John W. Tunnell Jr., Darryl L. Felder, and Sylvia A. Earle A continuation of the landmark scientific reference series from the Harte Research Institute for Gulf of Mexico Studies, Gulf of Mexico Origin, Waters, and Biota, Volume 3, Geology provides the most up-to-date, systematic, cohesive, and comprehensive description of the geology of the Gulf of Mexico Basin. The six sections of the book address the geologic history, recent depositional environments, and processes offshore and along the coast of the Gulf of Mexico. Scientific research in the Gulf of Mexico region is continuous, extensive, and has broad-based influence upon scientific, governmental, and educational communities. This volume is a compilation of scientific knowledge from highly accomplished and experienced geologists who have focused most of their careers on gaining a better understanding of the geology of the Gulf of Mexico. Their research, presented in this volume, describes and explains the formation of the Gulf Basin, Holocene stratigraphic and sea-level history, energy resources, coral reefs, and depositional processes that affect and are represented along our Gulf coasts. It provides valuable synthesis and interpretation of what is known about the geology of the Gulf of Mexico. Five years in the making, this monumental compilation is both a lasting record of the current state of knowledge and the starting point for a new millennium of study.
Download or read book Late Holocene Sea level Reconstructions on the Atlantic Coast of Florida USA written by Simin Liu and published by . This book was released on 2012 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Late Holocene Climate Variability from Northern Gulf of Mexico Sediments written by Julie N. Richey and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Accurate reconstruction of natural climate variability over the past millennium is critical for predicting responses to future climate change. In order to improve on current understanding of climate variability in the sub-tropical North Atlantic region over the past millennium, a rigorous study of Gulf of Mexico (GOM) sea surface temperature (SST) variability was conducted using both inorganic (foraminiferal Mg/Ca) and molecular organic (TEX6) geochemical proxies. In addition to generating multiple high-resolution climate records, the uncertainties of the SST proxies are rigorously assessed. There are 3 major research questions addressed: (1) What was the magnitude of GOM SST variability during the past 1,000 years, particularly during large-scale climate events such as the Little Ice Age (LIA) and the Medieval Warm Period (MWP). (2) Is the SST signal reproducible within the same sediment core, among different northern GOM basins, and using different geochemical SST proxies? (3) What are the ecological controls on the paleothermometers used to reconstruct SST variability in the GOM? Can differences in the ecology (i.e. seasonal distribution, depth habitat, etc.) of distinct paleothermometers be exploited to gain insight into changes in upper water column structure or seasonality in the GOM during the LIA and MWP? The major findings include: (1) The magnitude of temperature variability in the GOM over the past millennium is much larger than that estimated from Northern Hemisphere temperature reconstructions. The MWP (1400-900 yrs BP) was characterized by SSTs in the GOM that were similar to the modern SST, while the LIA (400-150 yrs BP) was marked by a series of multidecadal intervals that were 2-2.5°C cooler than modern. (2) This LIA cooling was replicated in the Mg/Ca-SST records from three different well-dated northern GOM basins (Pigmy, Garrison and Fisk Basins), as well as in two different geochemical proxies. (3) It is determined that foraminiferal test size has a significant effect on shell geochemistry. Using core-top calibration, discrepancies in the seasonal/depth habitats between different planktonic Foraminifera, and between Foraminifera and Crenarchaeota are inferred. Downcore differences are used to make inferences about changes in GOM mixed layer depth and seasonality over the past millennium.
Download or read book Handbook of Sea Level Research written by Ian Shennan and published by John Wiley & Sons. This book was released on 2015-02-19 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring sea-level change – be that rise or fall – is one of the most pressing scientific goals of our time and requires robust scientific approaches and techniques. This Handbook aims to provide a practical guide to readers interested in this challenge, from the initial design of research approaches through to the practical issues of data collection and interpretation from a diverse range of coastal environments. Building on thirty years of international research, the Handbook comprises 38 chapters that are authored by leading experts from around the world. The Handbook will be an important resource to scientists interested and involved in understanding sea-level changes across a broad range of disciplines, policy makers wanting to appreciate our current state of knowledge of sea-level change over different timescales, and many teachers at the university level, as well as advanced-level undergraduates and postgraduate research students, wanting to learn more about sea-level change. Additional resources for this book can be found at: www.wiley.com\go\shennan\sealevel
Download or read book Response of Upper Gulf Coast Estuaries to Holocene Climate Change and Sea level Rise written by John B. Anderson and published by Geological Society of America. This book was released on 2008-01-01 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the main impacts of global warming is accelerated sea-level rise: Intergovernmental Panel on Climate Change predictions suggest that the rate of rise could reach as high as 5'10 mm/yr by the end of this century. While it is generally recognized that accelerated sea-level rise will severely impact low-gradient coastlines, scientists are still ill prepared to predict coastal response. A study of seven Gulf Coast estuaries (Mobile Bay and Mississippi Sound, Weeks Bay, Calcasieu Lake, Sabine Lake, Galveston Bay, Matagorda Bay, and Corpus Christi Bay) was aimed at examining their response to past changes in the rate of sea-level rise and climate. The rates of change are of the same magnitude as those predicted for this century. The estuarine response to change has been one of abrupt landward retreat and major reorganization of estuarine environments at decadal time scales. This book should be of interest to scientists and policy makers concerned with future impacts of global warming.
Download or read book A 1400 Year Multi proxy Record of Hydrologic Variability in the Gulf of Mexico written by Jennifer A. Flannery and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Late Holocene climate variability includes the Little Ice Age (LIA, 450-150 BP) and the Medieval Warm Period (MWP, 1100-700 BP) that are characterized by contrasting hydrologic and thermal regimes. The degree of interaction between the North American continent and the ocean during these two abrupt climate events is not well known. Marine sedimentary records from basins proximal to major rivers integrate climate signals across large spatial scales and can provide a coherent, high-resolution assessment of the oceanic and continental responses to changing climate and hydrologic conditions. The Pigmy Basin in the northern Gulf of Mexico is ideally situated to record inputs from the Mississippi River and to relate these inputs to changing hydrologic conditions over North America during the LIA and MWP. Hydrologic variability recorded over the North America continent is directly dependent on the moisture balance (E/P) over the sub-tropical Gulf of Mexico (a major source of moisture to the North America continent). Warm, moist air masses from the south interact with cold/dry air masses from the north over the North American continent to produce storm fronts. Increased evaporation over the Gulf of Mexico leads to enhanced precipitation over the North American continent, due to the intensification of atmospheric circulation, which influences meridional moisture flux from the Gulf of Mexico to the North American continent. This study focuses on the sedimentary record spanning the last 1400 years and utilizes a multi-proxy approach incorporating organic and inorganic geochemical analyses to define intervals of varying continental inputs and to assess changes in the moisture balance (E-P) within the Gulf of Mexico.
Download or read book Publications of the Geological Survey written by and published by . This book was released on 1971 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sea Level Change written by National Research Council and published by National Academies Press. This book was released on 1990-02-01 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sea-level rise may be one of the consequences of global warming. To understand changes in sea level caused by the "greenhouse effect," we must understand the factors that have caused the sea level to fluctuate significantly throughout history. This new volume explores current views among scientists on the causes and mechanisms of sea-level change. The authors examine measurement programs and make recommendations aimed at improving our understanding of the factors that affect sea level. It will be welcomed by scientists, engineers, and policymakers concerned about "greenhouse" issues and sea-level change, the environmental community, researchers, and students.
Download or read book Reconstruction of Late Holocene Precipitation for Central Florida as Derived from Isotopes in Speleothems written by Limaris R. Soto and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Little is known about the paleo-precipitation of the Florida Peninsula. In order to better understand Floridas late Holocene climate variability (last 4,200 years), the isotopic composition was analyzed of four speleothems from two caves, in West-Central Florida. Two speleothems were collected from BRC Cave in Hernando County, and two others from Briar Cave in Marion County. This study represents the first speleothem-based paleoclimate records for Florida. Uranium-series disequilibrium analyses were determined by using thermal ionization mass spectrometry (TIMS) to provide accurate determination of chronology of the deposition of the speleothems.
Download or read book Sea Level Rise in Florida written by Albert C. Hine and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume proposes to provide a concise, simple, well-illustrated book that explains past sea rise events, what scientists know about the present and future sea level rise, the consequences of rise, and how Floridians might prepare.
Download or read book Geology of the Florida Keys written by Eugene A. Shinn and published by University Press of Florida. This book was released on 2018-01-16 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A joy to read from two of the most prominent geologists who have worked for the better part of their careers in the Florida Keys. Places important environmental focus on modern-day issues facing the island ecosystems, the health of Florida Bay, the nearshore areas, and ultimately the reef tract."--Donald F. McNeill, University of Miami "A compelling narrative that weaves fascinating historical personalities and periods with the geological characteristics of the Florida Keys into a colorful tapestry. A fun, interesting, and informative read!"--Eugene C. Rankey, University of Kansas Two world-class geologists draw on their prolific fifty-year careers in this comprehensive guide to the geology and biology of the Florida Keys and Florida Bay. Eugene Shinn and Barbara Lidz dive into the past, present, and future of an area that has long been a natural laboratory for learning about coral reef formation and the origins of limestone. They explain how underlying Pleistocene topography controls the shapes of today's coral reefs, how sea-level rise created Florida Bay, and how hurricanes mold limemud banks and strip vegetation from the Florida Keys. They discuss the recent decline of coral reefs due to overpopulation, pollution, climate change, and other factors. An itinerary is included for a hands-on three-day field trip, guiding visitors to the best places to see the famous reef formations and geologic processes of the Keys. As glaciers continue to melt and reform at Earth's poles, sea level is currently rising and will fall again at some point in the geologic future. In this volume, Shinn and Lidz demonstrate the value of the Keys and immediate surroundings as an environmental laboratory to study past effects of sea-level change and to stimulate ideas for further research.
