The Climatic Record In Polar Ice Sheets
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The Climatic Record In Polar Ice Sheets
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Author : Gordon de Q. Robin
language : en
Publisher: Cambridge University Press
Release Date : 2010-06-24
The Climatic Record In Polar Ice Sheets written by Gordon de Q. Robin and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-06-24 with Science categories.
This multi-author work examines the glacial geology; measurement; temperature; and the climatic record from ice cores and other topics.
The Climatic Record In Polar Ice Sheets
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Author : Gordon de Robin
language : en
Publisher:
Release Date : 1983
The Climatic Record In Polar Ice Sheets written by Gordon de Robin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.
Climate Into Ice
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Author : G. de Q. Robin
language : en
Publisher:
Release Date :
Climate Into Ice written by G. de Q. Robin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Brief survey of processes that control isotopic values on polar ice sheets is given along with summary of various studies of relationship between mean isotopic values and mean temperatures related to climatic record. Paper presented at 17th General Assembly of the International Union of Geodesy and Geophysics held in Canberra, December 7-8, 1979 (Proceedings 551.588/ALL).
The Ice Chronicles
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Author : Paul Andrew Mayewski
language : en
Publisher: UPNE
Release Date : 2012-07-03
The Ice Chronicles written by Paul Andrew Mayewski and has been published by UPNE this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-07-03 with Nature categories.
An exciting account of revolutionary new discoveries for understanding the earth's climate, and their implications for future scientific research and global environmental policy.
Quantifying Changes In Climate And Surface Elevation Of Polar Ice Sheets During The Last Glacial Interglacial Transition
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Author : Jessica Anne Badgeley
language : en
Publisher:
Release Date : 2022
Quantifying Changes In Climate And Surface Elevation Of Polar Ice Sheets During The Last Glacial Interglacial Transition written by Jessica Anne Badgeley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with categories.
This dissertation describes three research projects investigating changes in polar climate and the ice sheets during the last deglaciation. The first project, Chapter 2, reconstructs the past 20,000 years of Greenland temperature and precipitation to learn about their relationship and influences on the ice sheet. The reconstruction method, paleoclimate data assimilation, uses oxygen-isotope ratios of ice and accumulation rates from long ice-core records and extends this information to all locations across Greenland using spatial relationships derived from a transient climate-model simulation. Evaluations against out-of-sample proxy records indicate that the reconstructions capture the climate history at locations without ice-core records. The reconstructions show that the relationship between precipitation and temperature is frequency dependent and spatially variable, suggesting that thermodynamic scaling methods commonly used in ice-sheet modeling are overly simplistic. Overall, the results demonstrate that paleoclimate data assimilation is a useful tool for reconstructing the spatial and temporal patterns of past climate on timescales relevant to ice sheets. To learn how these climate reconstructions relate to the behavior of the ice sheet, we must also reconstruct the history of the ice sheet. Most observational data of the past ice sheet geometry, however, is at the margins of the ice sheet, while the ice core climate records are located in the interior. The second project, Chapter 3, investigates a common paleoaltimetry method that reconstructs elevation from temperature records. This method suggests the climate and elevation signals contained within an ice-core temperature record can be disentangled by comparing two proxy locations with similar climates. The difference between the records is assumed to be due to elevation, which is estimated by scaling the temperature difference by a lapse rate. I investigate the errors associated with this approach using the Antarctic ice sheet during the Last Glacial Maximum as a case study. Using an ensemble of climate simulations from global circulation models (GCMs), I extract modeled temperatures at locations of real ice cores. The errors are on the order of hundreds of meters and result from spatial heterogeneity in non-adiabatic temperature change, which itself stems in part from elevation-induced atmospheric circulation change. These findings suggest that caution is needed when interpreting temperature-based paleoaltimetry results for ice sheets. The third project, Chapter 4, seeks to learn about the elevation and climate signals contained within the WAIS Divide ice core temperature record by investigating whether they are consistent with accumulation rate reconstructions and annual layer thickness data at the ice core site. The difference in temperature change between West and East Antarctic ice core sites during the last deglacial period is about 6 °C. If this were due to differential elevation change at the sites, then the WAIS Divide ice core site would have been about 400 m higher during the Last Glacial Maximum. Using an ice-flow model, I determine that this elevation change is not consistent with published accumulation rate reconstructions and the annual layer thickness data from the WAIS Divide ice core site. Three factors may explain this inconsistency: the spatial heterogeneity in non-adiabatic temperature changes during the deglaciation, assumptions in the accumulation rate reconstructions, and assumptions in the ice-flow model. Future investigations into these factors may lead to a more consistent understanding of Antarctic climate and interior ice sheet changes during the last deglaciation.
Ice Sheets And Climate
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Author : Johannes Oerlemans
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Ice Sheets And Climate written by Johannes Oerlemans and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Climate modelling is a field in rapid development, and the fltudy of cryospheric processes has become an important part of it. On smaller time scales, the effect of snow cover and sea ice on the atmospheric circulation is of concern for long-range weather forecasting. Thinking in decades or centuries, the effect of a C02 climatic warming on the present-day ice sheets, and the resulting changes in global sea level, has drawn a lot of attention. In particular, the dynamics of marine ice sheets (ice sheets on a bed that would be below sea level after removal of ice and full isostatic rebound) is a subject of continuous research. This interest stems from the fact that the West Antarctic Ice Sheet is a marine ice sheet which, according to some workers, may be close to a complete collapse. The Pleistocene ice ages, or glacial cycles, are best characterized by total ice volume on earth, indicating that on 4 5 large time scales (10 to 10 yr) ice sheets are a dominant component of the climate system. The enormous amount of paleoclimatic information obtained from deep-sea sediments in the last few decades has led to a complete revival of iriterest in the physical aspects of the Pleistocene climatic evolution.
Glaciers And Ice Sheets In The Climate System
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Author : Andrew Fowler
language : en
Publisher: Springer Nature
Release Date : 2020-10-28
Glaciers And Ice Sheets In The Climate System written by Andrew Fowler and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-28 with Science categories.
Our realisation of how profoundly glaciers and ice sheets respond to climate change and impact sea level and the environment has propelled their study to the forefront of Earth system science. Aspects of this multidisciplinary endeavour now constitute major areas of research. This book is named after the international summer school held annually in the beautiful alpine village of Karthaus, Northern Italy, and consists of twenty chapters based on lectures from the school. They cover theory, methods, and observations, and introduce readers to essential glaciological topics such as ice-flow dynamics, polar meteorology, mass balance, ice-core analysis, paleoclimatology, remote sensing and geophysical methods, glacial isostatic adjustment, modern and past glacial fluctuations, and ice sheet reconstruction. The chapters were written by thirty-four contributing authors who are leading international authorities in their fields. The book can be used as a graduate-level textbook for a university course, and as a valuable reference guide for practising glaciologists and climate scientists.
Polar Ice Cores Climatic And Environmental Records
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Author : C. Lorius
language : en
Publisher:
Release Date : 1992
Polar Ice Cores Climatic And Environmental Records written by C. Lorius and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
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.
The Epica Dml Deep Ice Core
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Author : Sérgio Henrique Faria
language : en
Publisher: Springer
Release Date : 2017-10-16
The Epica Dml Deep Ice Core written by Sérgio Henrique Faria and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-16 with Science categories.
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.
Searise
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Author : Robert A. Bindschadler
language : en
Publisher:
Release Date : 1990
Searise written by Robert A. Bindschadler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Climatic changes categories.
Proceedings of a workshop on the possibility of a rapid rise in sea level following the response of the West Antarctic ice sheet to global warming, and outline of a project to study the phenomenon, called SEARISE : Sea Level Response to Ice Sheet Evolution.
