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The Flickering Switch Of Calcium Concentration In The Greenland Ice Core As An Indicator Of Changes In Large Scale Atmospheric Circulation Patterns
Download The Flickering Switch Of Calcium Concentration In The Greenland Ice Core As An Indicator Of Changes In Large Scale Atmospheric Circulation Patterns full books in PDF, epub, and Kindle. Read online The Flickering Switch Of Calcium Concentration In The Greenland Ice Core As An Indicator Of Changes In Large Scale Atmospheric Circulation Patterns ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis The "flickering Switch" of Calcium Concentration in the Greenland Ice Core as an Indicator of Changes in Large Scale Atmospheric Circulation Patterns by : Susan Anne Elston
Download or read book The "flickering Switch" of Calcium Concentration in the Greenland Ice Core as an Indicator of Changes in Large Scale Atmospheric Circulation Patterns written by Susan Anne Elston and published by . This book was released on 1995 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Linkages Between Arctic Warming and Mid-Latitude Weather Patterns by : National Research Council
Download or read book Linkages Between Arctic Warming and Mid-Latitude Weather Patterns written by National Research Council and published by National Academies Press. This book was released on 2014-05-29 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Arctic has been undergoing significant changes in recent years. Average temperatures are rising twice as fast as they are elsewhere in the world. The extent and thickness of sea ice is rapidly declining. Such changes may have an impact on atmospheric conditions outside the region. Several hypotheses for how Arctic warming may be influencing mid-latitude weather patterns have been proposed recently. For example, Arctic warming could lead to a weakened jet stream resulting in more persistent weather patterns in the mid-latitudes. Or Arctic sea ice loss could lead to an increase of snow on high-latitude land, which in turn impacts the jet stream resulting in cold Eurasian and North American winters. These and other potential connections between a warming Arctic and mid-latitude weather are the subject of active research. Linkages Between Arctic Warming and Mid-Latitude Weather Patterns is the summary of a workshop convened in September 2013 by the National Research Council to review our current understanding and to discuss research needed to better understand proposed linkages. A diverse array of experts examined linkages between a warming Arctic and mid-latitude weather patterns. The workshop included presentations from leading researchers representing a range of views on this topic. The workshop was organized to allow participants to take a global perspective and consider the influence of the Arctic in the context of forcing from other components of the climate system, such as changes in the tropics, ocean circulation, and mid-latitude sea surface temperature. This report discusses our current understanding of the mechanisms that link declines in Arctic sea ice cover, loss of high-latitude snow cover, changes in Arctic-region energy fluxes, atmospheric circulation patterns, and the occurrence of extreme weather events; possible implications of more severe loss of summer Arctic sea ice upon weather patterns at lower latitudes; major gaps in our understanding, and observational and/or modeling efforts that are needed to fill those gaps; and current opportunities and limitations for using Arctic sea ice predictions to assess the risk of temperature/precipitation anomalies and extreme weather events over northern continents.
Book Synopsis Natural Climate Variability on Decade-to-Century Time Scales by : National Research Council
Download or read book Natural Climate Variability on Decade-to-Century Time Scales written by National Research Council and published by National Academies Press. This book was released on 1996-08-30 with total page 645 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume reflects the current state of scientific knowledge about natural climate variability on decade-to-century time scales. It covers a wide range of relevant subjects, including the characteristics of the atmosphere and ocean environments as well as the methods used to describe and analyze them, such as proxy data and numerical models. They clearly demonstrate the range, persistence, and magnitude of climate variability as represented by many different indicators. Not only do natural climate variations have important socioeconomic effects, but they must be better understood before possible anthropogenic effects (from greenhouse gas emissions, for instance) can be evaluated. A topical essay introduces each of the disciplines represented, providing the nonscientist with a perspective on the field and linking the papers to the larger issues in climate research. In its conclusions section, the book evaluates progress in the different areas and makes recommendations for the direction and conduct of future climate research. This book, while consisting of technical papers, is also accessible to the interested layperson.
Book Synopsis Greenland Ice Core by : Chester C. Langway
Download or read book Greenland Ice Core written by Chester C. Langway and published by American Geophysical Union. This book was released on 1985 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantifying Changes in Climate and Surface Elevation of Polar Ice Sheets During the Last Glacial-interglacial Transition by : Jessica Anne Badgeley
Download or read book Quantifying Changes in Climate and Surface Elevation of Polar Ice Sheets During the Last Glacial-interglacial Transition written by Jessica Anne Badgeley and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Ice Drift, Ocean Circulation and Climate Change by : Jens Bischof
Download or read book Ice Drift, Ocean Circulation and Climate Change written by Jens Bischof and published by Springer Science & Business Media. This book was released on 2000-11 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: The issue of global warming and climate change is of continuous concern. Since the 1970s, it bas been shown that the pack-ice around the Arctic Ocean is thinning, the margin of permafrost is moving north and the vegetation in the high northern parts of the world is changing (the 'greening' of the Arctic). But are these changes the result of human activity or simply regular variations of the Earth's climate system? Over thousands of years, a continuous archive of iceberg and sea ice drift bas formed in the deep-sea sediments, revealing the place of the ice's origin and allowing a reconstruction of the surface currents and the climate of the past. However, the drift of floating ice from one place to another is not just a passive record of past ocean circulation. It actively influences and changes the surface ocean circulation, thus having a profound effect on climate change. Ice Drift, Ocean Circulation and Climate Change is the first book to focus on the interactions between ice, the ocean and the atmosphere and to describe how these three components of the climate system influence each other. It makes clear the positive contribution of paleoclimatology and paleoceanography and should be read by anyone concerned with global warming and climate change.
Book Synopsis Greenland ice core 'signal' characteristics by : P.A. Mayewski
Download or read book Greenland ice core 'signal' characteristics written by P.A. Mayewski and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Interaction Between Ice Sheets and the Large-scale Atmospheric Circulation Over the Last Glacial Cycle by :
Download or read book On the Interaction Between Ice Sheets and the Large-scale Atmospheric Circulation Over the Last Glacial Cycle written by and published by . This book was released on 2014 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term changes in the acid and salt concentrations of the Greenland Ice Core Project ice core from electrical stratigraphy by : E.W. WOLFF
Download or read book Long-term changes in the acid and salt concentrations of the Greenland Ice Core Project ice core from electrical stratigraphy written by E.W. WOLFF and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Book Synopsis High-resolution Greenland ice core data show abrupt climate change happens in a few years by : J.P. STEFFENSEN
Download or read book High-resolution Greenland ice core data show abrupt climate change happens in a few years written by J.P. STEFFENSEN and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polar Ice Cores: Climatic and Environmental Records by : C. Lorius
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.
Book Synopsis The Two-mile Time Machine by : Richard B. Alley
Download or read book The Two-mile Time Machine written by Richard B. Alley and published by . This book was released on 2000 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Richard Alley tells the history of global climate changes as revealed by reading the annual rings of ice from cores drilled in Greenland. In the 1990s he 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
Book Synopsis The Sun, the Earth, and Near-earth Space by : John A. Eddy
Download or read book The Sun, the Earth, and Near-earth Space written by John A. Eddy and published by Government Printing Office. This book was released on 2009 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: " ... Concise explanations and descriptions - easily read and readily understood - of what we know of the chain of events and processes that connect the Sun to the Earth, with special emphasis on space weather and Sun-Climate."--Dear Reader.
Book Synopsis High-resolution Analysis of Rapid Climate Change from Greenland Ice Cores by : Elizabeth Ruth Thomas
Download or read book High-resolution Analysis of Rapid Climate Change from Greenland Ice Cores written by Elizabeth Ruth Thomas and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Concentration and Size Distribution of Microparticles in the NGRIP Ice Core (central Greenland) During the Last Glacial Period by :
Download or read book Concentration and Size Distribution of Microparticles in the NGRIP Ice Core (central Greenland) During the Last Glacial Period written by and published by . This book was released on 2002 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quaternary Dating Methods by : Mike Walker
Download or read book Quaternary Dating Methods written by Mike Walker and published by John Wiley & Sons. This book was released on 2013-04-30 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory textbook introduces the basics of dating, the range of techniques available and the strengths and limitations of each of the principal methods. Coverage includes: the concept of time in Quaternary Science and related fields the history of dating from lithostratigraphy and biostratigraphy the development and application of radiometric methods different methods in dating: radiometric dating, incremental dating, relative dating and age equivalence Presented in a clear and straightforward manner with the minimum of technical detail, this text is a great introduction for both students and practitioners in the Earth, Environmental and Archaeological Sciences. Praise from the reviews: "This book is a must for any Quaternary scientist." SOUTH AFRICAN GEOGRAPHICAL JOURNAL, September 2006 “...very well organized, clearly and straightforwardly written and provides a good overview on the wide field of Quaternary dating methods...” JOURNAL OF QUATERNARY SCIENCE, January 2007
