Download or read book Palaeosalinity Change in the Taw Estuary South west England written by Glenn Michael Havelock and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Present models of Holocene estuary evolution are driven largely by changes in relative sea-level (RSL) with little reference to long-term changes in fluvial regime and regional climate. Recent US studies of estuarine sequences have shown that decadal-centennial scale fluctuations in river discharge and freshwater inflow can be inferred by changes in estuarine palaeosalinity and that the timing of these events reflect changes in regional precipitation. It is therefore becoming apparent that estuarine sequences may hold an archive of mid-late Holocene climate change information, as well as being recorders of RSL change. The principal aim of this study is to produce a palaeosalinity-based climate record for southern England during the late Holocene, based on changes in climate-driven freshwater influx into the estuarine environment. The late Holocene palaeosalinity record of the inner Taw Estuary will be reconstructed using diatom salinity index as a proxy for salinity. Nine periods of below-average or above-average palaeosalinity have been recognised in the Taw Estuary since 300 cal.yr. BC. Four intervals of high river discharge are identified at 520-780, 850-1030, 1215-1315, and 1420-1900 cal.yr. AD. Five intervals of low river discharge are identified at 300-520, 780-850, 1030-1215, 1315-1420, and 1900-2000 cal.yr. AD. This shows that there has been significant climatic variation in southern Britain since c.300 cal.yr. AD, with climatic shifts evident in the estuarine record. In order to validate this record, the fluvial geomorphic history of the lower Taw valley was also investigated. There is a strong correspondence between the dry and wet climatic periods identified in the estuary and the geomorphic fluvial history and flood record of the lower Taw valley. Comparisons with other proxy climate records in the UK and Europe show a high degree of correspondence with the Taw Estuary palaeosalinity-based climate record. As the inner estuary environment will also be influenced by RSL change during the late Holocene, RSL change since c.6600 cal.yr. BP was successfully reconstructed in the Taw Estuary, with eleven new validated SLIPs providing evidence of former MSL. The magnitude and rates of RSL rise in north Devon are compared with other RSL records in southern Britain, suggesting that the isostatic history is similar to other areas bordering the Bristol Channel and with the central south coast of England. Fluctuations in palaeosalinity in the late Holocene are seen to be mainly controlled by centennial-scale changes in climate-driven river discharge, rather than RSL change.
Download or read book Geomorphology in the Anthropocene written by Andrew S. Goudie and published by Cambridge University Press. This book was released on 2016-10-10 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Anthropocene is a major new concept in the Earth sciences and this book examines the effects on geomorphology within this period. Drawing examples from many different global environments, this comprehensive volume demonstrates that human impact on landforms and land-forming processes is profound, due to various driving forces, including: use of fire; extinction of fauna; development of agriculture, urbanisation, and globalisation; and new methods of harnessing energy. The book explores the ways in which future climate change due to anthropogenic causes may further magnify effects on geomorphology, with respect to future hazards such as floods and landslides, the state of the cryosphere, and sea level. The book concludes with a consideration of the ways in which landforms are now being managed and protected. Covering all major aspects of geomorphology, this book is ideal for undergraduate and graduate students studying geomorphology, environmental science and physical geography, and for all researchers of geomorphology.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1976 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Anthropogenic Geomorphology written by József Szabó and published by Springer Science & Business Media. This book was released on 2010-04-10 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenic geomorphology studies society’s impact on the geographical environment, and especially on the Earth’s surface. This volume provides guidance to students discussing the basic topics of anthropogenic geomorphology. The chapters cover both its system, and its connections with other sciences, as well as the way the subject can contribute to tackling today’s practical problems. The book represents all fields of geomorphology, giving an introduction to the diversity of the discipline through examples taken from a range of contexts and periods, and focusing on examples from Europe. It is no accident that anthropogenic geomorphology has been gaining ground within geomorphology itself. Its results advance not only the theoretical development of the science but can be applied directly to social and economic issues. Worldwide, anthropogenic geomorphology is an integral and expanding part of earth sciences curricula in higher education, making this a timely and relevant text.
Download or read book A Stratigraphical Basis for the Anthropocene written by C.N. Waters and published by Geological Society of London. This book was released on 2014-06-05 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Humankind has pervasively influenced the Earth’s atmosphere, biosphere, geosphere, hydrosphere and cryosphere, arguably to the point of fashioning a new geological epoch, the Anthropocene. To constrain the Anthropocene as a potential formal unit within the Geological Time Scale, a spectrum of indicators of anthropogenically-induced environmental change is considered, and shown as stratigraphical signals that may be used to characterize an Anthropocene unit, and to recognize its base. This volume describes a range of evidence that may help to define this potential new time unit and details key signatures that could be used in its definition. These signatures include lithostratigraphical (novel deposits, minerals and mineral magnetism), biostratigraphical (macro- and micro-palaeontological successions and human-induced trace fossils) and chemostratigraphical (organic, inorganic and radiogenic signatures in deposits, speleothems and ice and volcanic eruptions). We include, finally, the suggestion that humans have created a further sphere, the technosphere, that drives global change.
Download or read book The Scientific Nature of Geomorphology written by Colin E. Thorn and published by Bruce Rhoads. This book was released on 1996 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mediterranean Desertification written by N. A. Geeson and published by John Wiley & Sons. This book was released on 2003-04-11 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Desertification includes land degradation due to both climatic and anthropogenic causes, where land includes water, soil, and the biosphere. This book presents the most recent findings from the European Community's MEDALUS project, which was formed to understand and manage semi-arid environments that are undergoing great change. * Covers climate and land use processes and responses in the Mediterranean * First book to provide guidelines for the management of land degradation in Mediterranean environments * Based on first-hand experience of the problems by those responsible for solving them
Download or read book The Earth s Sedimentary Shell written by Aleksandr Borisovich Ronov and published by Amer Geological Institute. This book was released on 1983 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report on the geology of the Henry Mountains written by Grove Karl Gilbert and published by . This book was released on 1877 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: I. Introductory -- II. Structure of the Henry Mountains -- III. Detailed description of the mountains -- IV. The laccolite -- V. Land sculpture -- VI. Economic.
Download or read book Coastal and Estuarine Management written by Peter French and published by Routledge. This book was released on 2002-11-01 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: The coast cannot be left to nature to determine its fate. Wealth, property, economic interests, recreation, tourism and wildlife are all threatened. Coasts are an administrative battle ground and one of the most important and widely examined topics in environmental management. Coastal and Estuarine Management examines the issues surrounding the human use and abuse of estuarine and coastal environments. Emphasising the importance and significance of this natural resource, the uses and conflicts which occur and the results of human activity, this book explains the ways in which conservation and management policies and practices can protect this productive and diverse ecosystem. Examples and real-life case studies illustrate the effect of human intervention, both from an historic and contemporary perspective. Exposing the environmental consequences of estuarine pollution, Peter French highlights the need for management strategies to promote a sustainable development ethic for estuaries.
Download or read book Hydraulic mining D bris in the Sierra Nevada written by Grove Karl Gilbert and published by . This book was released on 1917 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Considered a landmark in California gold mining history. Public indignation against spoilage of rich agricultural land and clogging of watercourses by debris generated by hydraulic mining in the Sierra foothills led to the winning of a major battle against the miners ... [The author] examines the need to find a solution to the debris from the mining operations"--Bookdealer's description.
Download or read book Engineering Geomorphology written by P. G. Fookes and published by . This book was released on 2007 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes basic concepts to explain the causes, mechanisms and consequences of landform change. Considers how the land surface works in the context of wetland, flatland, hills, mountains, rivers and coasts; and the engineering techniques available in the field, the laboratory, the office, and in remote sensing.
Download or read book The Geography and Map Division written by Library of Congress. Geography and Map Division and published by . This book was released on 1975 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estuarine Science written by John E. Hobbie and published by . This book was released on 2000 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is organized into five parts reflecting major topics in estuarine synthesis: prediction of inputs from drainage basins; coupling of physical and ecological factors; links between biogeochemistry and food webs; controls of estuarine habitats; and the role of synthesis in addressing issues of management. Each part contains an introduction; plenary talks illustrating case histories of successful syntheses; and a workshop report report presenting an overview of the topic, goals for further synthesis, and recommendations about the data, knowledge, and models necessary to attain these goals.
Download or read book Alluvial Geoarchaeology written by A. G. Brown and published by Cambridge University Press. This book was released on 1997-03-27 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive technical manual aimed at archaeologists, physical geographers, geologists and environmental scientists.
Download or read book Environmental Change in Drylands written by Andrew C. Millington and published by . This book was released on 1994-06-30 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encompasses a wide-ranging selection of peer-reviewed papers covering geomorphology and biogeography including research which has sought to integrate the two disciplines. The main division of articles has been made in terms of timescales of the studies in which the majority of evidence presented relates to environments before the last 1000 years.
Download or read book Desertification and Risk Analysis Using High and Medium Resolution Satellite Data written by Alberto Marini and published by Springer Science & Business Media. This book was released on 2008-11-27 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work becomes with methodological rigor a part of the innovative proposals for the characterization of the areas at risk of desertification. The complexity of the phenomenon of desertification, which involves extended surfaces in all continents, is one of the most alarming processes of the environmental degradation of our Planet and threatens the health and the living conditions of over a billion of persons. The food crisis, in continuous increase, ask for the world of research to urgently supply reassuring solutions concerning the acquisition of indicators, which are easy to monitor and concur to control the phenomenon in order to fight its acceleration. The constant but different combination that determines the diffusion of deserti- cation in the territories, attributable mostly to climatic changes and the activities of the man, makes our job challenging and complicated, since it varies from region to region. We are aware of all this and therefore we think that the methodological approach of survey of the data is an extremely important element to locate of the phenomenon and to monitor its course. This work, which is characterized for its multi-disciplinary approach, suggests solutions that we wish will quickly find concrete applications at international level. Prof. Bruno Dettori President CNLSD (Comitato Nazionale per la Lotta alla Siccità e alla Desertificazione) v
