Download or read book Polar Ice Cores Climatic and Environmental Records written by C. Lorius and published by . This book was released on 1992 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ice cores from Greenland and Antarctica provide multiple proxy records of climatic and environmental parameters. They reveal the anthropogenic impact on aerosol concentrations in Greenland snow (i.e., S04 and N03) and on atmospheric greenhouse gases. For example, increases over the last 200 years are about 25% for C02, 8 % for N202 and about 200% for CH4. Over the last climatic cycle (i.e., - 150 Kyr) the glacial-interglacial surface temperature change may be -1O deg C, with glacial stages generally associated with lower snow accumulation and higher concentrations of marine and continental aerosols reflecting enlarged source areas and increased atmospheric transport. Greenland ice has recorded rapid changes of climate during the last ice age and deglaciation. The 18 or D records from the Vostok ice core (Antarctica) strongly suggest the role of insolation orbital forcing, as well as a close relation between temperature and greenhouse gas concentrations. C02 and CH4 concentrations increase by about 40% and 100% during glacial interglacial transitions, respectively. It appears likely that fluctuating greenhouse gas concentrations have had a significant role in the glacial-interglacial climate changes by amplifying, together with the growth and decay of the Northern Hemisphere ice sheets, the orbital forcing.
Download or read book The Environmental Record in Glaciers and Ice written by H. Oeschger and published by . This book was released on 1989-05-09 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains background papers and summary group reports from a workshop concerned with the environmental records contained in the layered sequences of ice sheets and glaciers. Examines: a) how glaciers record and preserve environmental processes; b)establishing ice core chronology; c)anthropogenic impacts recorded in glaciers; d)ice-core record of long-term global changes in the environment.
Download or read book The Two Mile Time Machine written by Richard B. Alley and published by Princeton University Press. This book was released on 2014-10-26 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the 1990s Richard B. Alley and his colleagues made headlines with the discovery that the last ice age came to an abrupt end over a period of only three years. In The Two-Mile Time Machine, Alley tells the fascinating history of global climate changes as revealed by reading the annual rings of ice from cores drilled in Greenland. He explains that humans have experienced an unusually temperate climate compared to the wild fluctuations that characterized most of prehistory. He warns that our comfortable environment could come to an end in a matter of years and tells us what we need to know in order to understand and perhaps overcome climate changes in the future. In a new preface, the author weighs in on whether our understanding of global climate change has altered in the years since the book was first published, what the latest research tells us, and what he is working on next.
Download or read book Encyclopedia of Paleoclimatology and Ancient Environments written by Vivien Gornitz and published by Springer Science & Business Media. This book was released on 2008-10-31 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of Springer’s Major Reference Works, this book gives the reader a truly global perspective. It is the first major reference work in its field. Paleoclimate topics covered in the encyclopedia give the reader the capability to place the observations of recent global warming in the context of longer-term natural climate fluctuations. Significant elements of the encyclopedia include recent developments in paleoclimate modeling, paleo-ocean circulation, as well as the influence of geological processes and biological feedbacks on global climate change. The encyclopedia gives the reader an entry point into the literature on these and many other groundbreaking topics.
Download or read book Ice Core Studies of Global Biogeochemical Cycles written by Robert J. Delmas and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: The analysis of polar ice cores has proven to be very instructive about past environmental conditions on the time scale of several climatic cycles, and recent drilling operations have provided information of great value for global change issues. The book presents the most recent data extracted from Greenland ice cores and surface experiments and compares them with former Antarctic results. It contains background articles, original contributions and group reports of interest to scientists, climatologists, atmospheric chemists, and glaciologists involved in global change research.
Download or read book Antarctic Climate Evolution written by Fabio Florindo and published by Elsevier. This book was released on 2008-10-10 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antarctic Climate Evolution is the first book dedicated to furthering knowledge on the evolution of the world’s largest ice sheet over its ~34 million year history. This volume provides the latest information on subjects ranging from terrestrial and marine geology to sedimentology and glacier geophysics. An overview of Antarctic climate change, analyzing historical, present-day and future developments Contributions from leading experts and scholars from around the world Informs and updates climate change scientists and experts in related areas of study
Download or read book The EPICA DML Deep Ice Core written by Sérgio Henrique Faria and published by Springer. This book was released on 2017-10-16 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: The line-scan images collected in this book represent the most accurate optical record of Antarctic ice cores ever presented, providing an invaluable resource for glaciologists and climate modellers, as well as a fascinating compilation of ice core images for Antarctica enthusiasts. Global warming and the Earth’s past climate are the two main reasons for extracting deep ice cores from Antarctica. Indeed, dust particles, aerosols and other climatic traces deposited on the snow surface, as well as the air trapped in bubbles by compacted snow, produce chronologically ordered strata, making the ice from Antarctica the most accurate and valuable archive of the Earth’s climate over the last million years. In addition, the layered structure produced by these strata, when revealed by appropriate methods, provides indispensable information concerning the flow and mechanical stability of the Antarctic ice sheet, allowing us to assess the current and future impact of global warming on the melting of polar ice caps with much greater precision.
Download or read book Arctic and Environmental Change written by J.A. Dowdeswell and published by Routledge. This book was released on 2019-09-17 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely book presents a wide-ranging review of Arctic environmental change in response to global warming, and gives a broad insight into the transformation of the Arctic which we can expect during the next century. It is in high northern latitudes that we can expect to observe global warming at its most powerful, making it a natural laboratory where climate changes and their impacts can be monitored and studied more readily than elsewhere in the world. Fourteen authoritative reviews cover the predictions of warming rates by General Circulation Models; variabilities in atmospheric circulation and moisture flux; the dynamics of the polar vortex in the Arctic and its role in ozone loss; the countervailing influence of air pollution in reducing solar irradiance; and the impact of climatic change on Arctic terrestrial and marine ecosystems. Also detailed are the thermohaline circulation of the ocean, the extent and thickness of sea ice, the sizes of glaciers and ice sheets, and the extent of permafrost. Moving to past changes, the records from Greenland ice cores and deep ocean drilling are reviewed for what they tell us about past climates and glaciation in the Arctic., The book paints a vivid and disturbing picture of the enhanced warming that can be expected in the Arctic relative to lower latitudes, and of the major impacts that this will have on the northern cryosphere. It will be an invaluable reference for anyone seeking a greater understanding of the factors and processes affecting the arctic environment, which may ultimately have a major impact on global climatic change.
Download or read book The Ice Chronicles written by Paul Andrew Mayewski and published by UPNE. This book was released on 2012-07-03 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exciting account of revolutionary new discoveries for understanding the earth's climate, and their implications for future scientific research and global environmental policy.
Download or read book Frozen Annals written by W. Dansgaard and published by . This book was released on 2004 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Great Ice Age written by R. C. L. Wilson and published by Psychology Press. This book was released on 2000 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Great Ice Age documents and explains the natural climatic and palaeoecologic changes that have occurred during the past 2.6 million years, outlining the emergence and global impact of our species during this period. Exploring a wide range of records of climate change, the authors demonstrate the interconnectivity of the components of the Earths climate system, show how the evidence for such change is obtained, and explain some of the problems in collecting and dating proxy climate data. One of the most dramatic aspects of humanity's rise is that it coincided with the beginnings of major environmental changes and a mass extinction that has the pace, and maybe magnitude, of those in the far-off past that stemmed from climate, geological and occasionally extraterrestrial events. This book reveals that anthropogenic effects on the world are not merely modern matters but date back perhaps a million years or more.
Download or read book The Climatic Record in Polar Ice Sheets written by Gordon de Q. Robin and published by Cambridge University Press. This book was released on 2010-06-24 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This multi-author work examines the glacial geology; measurement; temperature; and the climatic record from ice cores and other topics.
Download or read book Climate Change written by The Royal Society and published by National Academies Press. This book was released on 2014-02-26 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate Change: Evidence and Causes is a jointly produced publication of The US National Academy of Sciences and The Royal Society. Written by a UK-US team of leading climate scientists and reviewed by climate scientists and others, the publication is intended as a brief, readable reference document for decision makers, policy makers, educators, and other individuals seeking authoritative information on the some of the questions that continue to be asked. Climate Change makes clear what is well-established and where understanding is still developing. It echoes and builds upon the long history of climate-related work from both national academies, as well as on the newest climate-change assessment from the United Nations' Intergovernmental Panel on Climate Change. It touches on current areas of active debate and ongoing research, such as the link between ocean heat content and the rate of warming.
Download or read book Earth Paleoenvironments Records Preserved in Mid and Low Latitude Glaciers written by L.DeWayne Cecil and published by Springer Science & Business Media. This book was released on 2006-04-11 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glaciers provide an unparalleled tool for studying global environmental change. This book is the first of its kind concentrating on the paleoenvironmental record archived in mid- and low-latitude glaciers. By concentrating mainly on the last 500 years of these records, we can now see that laws enacted to protect our environment in Europe and North America are providing positive results. Documenting global mid- and low-latitude paleoenvironmental records in glaciers, this volume forms a timely and essential complement to the wealth of literature on polar and Greenland ice sheet records. This text is directed towards undergraduate and graduate university audiences and forms an ideal supplement in courses dealing with climate and global environmental change, glaciology, and natural resources management. It is also suitable in helping teach application of innovative analytical and interpretive methods and would be an excellent example of the rapidly emerging discipline of "Forensic Earth Science".
Download or read book Abrupt Climate Change written by National Research Council and published by National Academies Press. This book was released on 2002-04-23 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The climate record for the past 100,000 years clearly indicates that the climate system has undergone periodic-and often extreme-shifts, sometimes in as little as a decade or less. The causes of abrupt climate changes have not been clearly established, but the triggering of events is likely to be the result of multiple natural processes. Abrupt climate changes of the magnitude seen in the past would have far-reaching implications for human society and ecosystems, including major impacts on energy consumption and water supply demands. Could such a change happen again? Are human activities exacerbating the likelihood of abrupt climate change? What are the potential societal consequences of such a change? Abrupt Climate Change: Inevitable Surprises looks at the current scientific evidence and theoretical understanding to describe what is currently known about abrupt climate change, including patterns and magnitudes, mechanisms, and probability of occurrence. It identifies critical knowledge gaps concerning the potential for future abrupt changes, including those aspects of change most important to society and economies, and outlines a research strategy to close those gaps. Based on the best and most current research available, this book surveys the history of climate change and makes a series of specific recommendations for the future.
Download or read book Global Scale Climate and Environment Study Through Polar Deep Ice Cores written by Hitoshi Shoji and published by . This book was released on 2003 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Records in a High altitude Low latitude Glacier Sierra Nevada California written by Alison Jane Gillespie and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Glaciers are sensitive and detailed recorders of changes in local, regional, and global climate. Stable isotope variations reflect seasonal temperature changes, physical stratigraphy relates to net precipitation, and trace element concentrations mark seasonal surfaces in the ice. Previous studies have largely focused on polar ice cores because cold, dry conditions in such locations are ideal for preserving ice stratigraphy. Conversely, low-latitude alpine glaciers have been generally ignored because warmer, wetter conditions in them have been presumed to destroy or obscure the original stable isotope stratigraphy. Here, I evaluate the potential to obtain viable environmental records from an ice core of Palisade Glacier Sierra Nevada, California. A shallow, 6-m ice core drilled in the accumulation zone in late summer 2003 was analyzed at ~10-cm intervals for stable isotopes (O16/O18 and D/H) and trace element concentrations. Five stable-isotope maxima and minima couplets occur in the ice core, varying from -16.7 to -14 0/00 ([lower case delta] 180 and -133 to -1110/00 ([lower case delta] D). The isotope values follow the global meteoric water line, indicating minimal post-depositional disruption of the ice. Maxima in six representative trace-elements (Al, Pb, Mn, V, Ba, Sr) correspond well to those in the isotope records. The covariance of stable-isotopes and trace-elements indicate that the original chemical stratigraphy is preserved in the ice core. These results show that the ice core contains at least 5 years of ice accumulation. Analyses of excess Pb and of precipitation and temperature records from a nearby weather station indicate these 5 years most likely accumulated between 1992 and 1998, and that annual layer thicknesses average about 1 m. This interpretation, combined with the substantial dust band at the surface of the ice core indicate that the five years of accumulation after 1998 (all of which were below-average snowfall) were lost to ablation. Thus, despite five years of net ice loss at the site due to surface melt, the isotopic and elemental stratigraphy is still preserved. The important implication of this finding is that ice in such temperate alpine glaciers appears to be a more robust archive of paleoclimatic information than previously recognized. Furthermore, although the ice core retrieved from the Palisade Glacier likely contains significant gaps, retrieval of a core to bedrock will likely provide the most complete ice core record of paleoclimate data available in the Sierra Nevada.
