An Inverse Model Study of Abrupt Climate Change During Last Ice Age

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Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.:/5 (7 download)

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Book Synopsis An Inverse Model Study of Abrupt Climate Change During Last Ice Age by : Shaoping Lu

Download or read book An Inverse Model Study of Abrupt Climate Change During Last Ice Age written by Shaoping Lu and published by . This book was released on 2010 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geologic records and climate model simulations suggest that changes in the meridional heat transport in the Atlantic Ocean were involved in the abrupt warming events -- the so-called Dansgaard-Oeschger Interstadials (DOIs) -- that punctuated an otherwise cold Greenland climate during the last glacial period. However, the role of Northern Hemisphere (NH) ice sheets in these events remains a subject of controversy. Here we report on the first attempt to combine quantitatively a paleo-temperature proxy with simplified ocean models, with the specific purpose of extracting information about the changes in mass balance of the NH ice sheets during the last glaciation. A Greenland paleotemperature record is combined with the climate models using Bayesian Stochastic Inversion (BSI) in order to estimate the changes that would be required to alter the Atlantic Ocean mass and heat transports between ~30 and 39 thousand years ago. The mean sea level changes implied by changes in NH ice sheet mass balance agree in amplitude and timing with reconstructions from the geologic record, which gives some support to the freshwater forcing hypothesis. Our results are unaffected by uncertainties in the representation of vertical buoyancy transport in the tropical ocean, in large part because the global adjustments to high latitude freshening bypass the tropics and affect sinking rate in the opposite pole. However, the solutions are sensitive to assumptions about physical processes at polar latitudes. We find that the inversion reproduces the gradual changes in sea level and Antarctic temperature inferred from the independent evidence provided by proxy records. The Greenland warm event lasting over 3000 years (DOI 8) can be explained by sustained growth of NH ice sheet and reduced supply of icebergs to the North Atlantic. Our results indicate a more involved role of the NH ice sheets than previously thought, in which both collapse and subsequent growth would be required to explain the full series of the long (> 3000 years) warm events recorded in Greenland ice.

The Great Ice Age

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Publisher : Psychology Press
ISBN 13 : 9780415198417
Total Pages : 290 pages
Book Rating : 4.1/5 (984 download)

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Book Synopsis The Great Ice Age by : R. C. L. Wilson

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.

Abrupt Climate Change: North Atlantic Volatility During the Last Ice Age and Modern Arctic Sea Ice Retreat

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Publisher :
ISBN 13 : 9780549614838
Total Pages : 272 pages
Book Rating : 4.6/5 (148 download)

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Book Synopsis Abrupt Climate Change: North Atlantic Volatility During the Last Ice Age and Modern Arctic Sea Ice Retreat by : Ian L. Eisenman

Download or read book Abrupt Climate Change: North Atlantic Volatility During the Last Ice Age and Modern Arctic Sea Ice Retreat written by Ian L. Eisenman and published by . This book was released on 2008 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last glacial period was characterized by abrupt switches between cold and warm climate regimes recorded in Greenland ice cores. The proximity of Greenland to the sea ice edge, among other factors, suggests that sea ice played an important role in these climate changes. In modern times, recent decades have seen a rapid retreat of Arctic sea ice. The author investigates the physical processes governing these abrupt changes in North Atlantic climate. The questions are approached using global climate models, idealized models, and observational analysis. The main findings of this research are summarized as follows: (i) the atmospheric response to receding glacial ice sheets, with sea ice amplification, may have contributed to the Younger Dryas abrupt cold interval 12,000 years ago; (ii) glacial climate may allow multiple states supported by feedbacks between sea ice and ocean circulation, with Dansgaard-Oeschger abrupt warming cycles being jumps between them; (iii) the disparity between rates of annual maximum (March) and annual minimum (September) sea ice extent retreat during recent decades may be due to coastline geometry; (iv) due to the impact of cloud simulation errors on Arctic sea ice, global climate model simulations of present-day sea ice conditions may agree less well than previous studies have suggested; (v) the possibility of a "tipping point" as Arctic sea ice recedes may be unlikely in the near future but likely in a more distant approach to perennially ice-free Arctic Ocean conditions. This work has direct implications regarding the cause of abrupt climate changes during the last glacial period, the characteristics of modern observed sea ice retreat, and the prediction of future changes in Arctic sea ice conditions.

Palaeoclimatic Research and Models

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Publisher : Springer Science & Business Media
ISBN 13 : 9400972369
Total Pages : 271 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Palaeoclimatic Research and Models by : Anver Ghazi

Download or read book Palaeoclimatic Research and Models written by Anver Ghazi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Palaeoclimatology is presently experiencing a period of rapid growth of techniques and concepts. Studies of earth's past climates ryrovide excellent opportunities to examine the interactions between the atmosrhere, oceans, cryosphere and the land surfaces. Thus, there is a growing recognition of the need of close collaboration between palaeoclimatologists and the climate mode 11 ers. The workshop "Palaeoclimatic Research and Models (PRaM)" was organized by the Directorate General for Science, Research and Development within the framework of the Climatology Research Programme of the Commission of the European Communities (CEC). The aim of the workshop was to give to the members of the Contact Group "Climate Models" and "Reconstitution of Past Climates" of the CEC Climatology Research Program~e and to some invited scientists the opportunity to discuss problems of mutual interest. About 35 experts fr.om 10 countries took nart in the workshop. In general, palaeoclimatologists were asked to identify and discuss the data corresponding to the three topics as defined by the programme committee: 1) Abrupt Climate Changes 2) Initiation of Glaciation 3) Glaciated polar regions and their impact on global climate. Climate modellers were asked to give their views as to how these specific problems could be modelled, what use could be ~ade of the available palaeoclimatic data and which complementary data are needed for modelling.

Abrupt Climate Change at the End of the Last Great Ice Age and Its Subsequent Impact on Civilizations

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Publisher :
ISBN 13 :
Total Pages : 244 pages
Book Rating : 4.:/5 (55 download)

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Book Synopsis Abrupt Climate Change at the End of the Last Great Ice Age and Its Subsequent Impact on Civilizations by : Jason Touchette

Download or read book Abrupt Climate Change at the End of the Last Great Ice Age and Its Subsequent Impact on Civilizations written by Jason Touchette and published by . This book was released on 2009 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ice Ages and Interglacials

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Publisher : Springer Science & Business Media
ISBN 13 : 3540896805
Total Pages : 275 pages
Book Rating : 4.5/5 (48 download)

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Book Synopsis Ice Ages and Interglacials by : Donald Rapp

Download or read book Ice Ages and Interglacials written by Donald Rapp and published by Springer Science & Business Media. This book was released on 2009-08-22 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book studies the history and gives an analysis of extreme climate change on Earth. In order to provide a long-term perspective, the first chapter briefly reviews some of the wild gyrations that occurred in the Earth’s climate hundreds of millions of years ago: snowball Earth and hothouse Earth. Coming closer to modern times, the effects of continental drift, particularly the closing of the Isthmus of Panama are believed to have contributed to the advent of ice ages in the past three million years. This first chapter sets the stage for a discussion of ice ages in the geological recent past (i.e. within the last three million years, with an emphasis on the last few hundred thousand years). The second chapter discusses geological evidence for ice ages – how geologists surmised their existence prior to actual subsurface data that proved the theory. The following two chapters look at ice cores (primarily from Greenland and Antarctica). Chapter 3 discusses how ice core data is processed and Chapter 4 summarizes data obtained from ice cores. Chapter 5 discusses the processing of data obtained from ocean sediments, and summarizes the results, while the following chapter discusses data from other sources, such as "Devil’s Cave." Chapter 7 summarizes the experimental results from Chapters 4, 5, and 6. It provides the foundation for comparison with theories in later chapters. In a perfect world, this data would be totally separate and disconnected from theory. Unfortunately, as the author shows, dating of much of the data was accomplished by "tuning" to the astronomical theory, which introduces circular reasoning. Chapter 8 provides a brief overview of the various theories that have been devised to "explain" the patterns of alternating ice ages and interglacials that have occurred over the past three million years. This serves as an introduction to the following three chapters which presents the astronomical theory in its various manifestations, compare the astronomical theory with data, and then compare other theories with data. Finally, Chapter 12 summarizes what we think we know about ice ages and, more importantly, what we don’t know.

Abrupt Climatic Change

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Publisher : Springer Science & Business Media
ISBN 13 : 9400939930
Total Pages : 414 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Abrupt Climatic Change by : W.H. Berger

Download or read book Abrupt Climatic Change written by W.H. Berger and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop, St. Hugues de Biviers, France, October 16-22, 1985

The Great Ice Age

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Publisher : Routledge
ISBN 13 : 1134640323
Total Pages : 292 pages
Book Rating : 4.1/5 (346 download)

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Book Synopsis The Great Ice Age by : J.A. Chapman

Download or read book The Great Ice Age written by J.A. Chapman and published by Routledge. This book was released on 2005-06-21 with total page 292 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.

Abrupt Climate Change

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Publisher : DIANE Publishing
ISBN 13 : 1437915698
Total Pages : 258 pages
Book Rating : 4.4/5 (379 download)

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Book Synopsis Abrupt Climate Change by : Peter U. Clark

Download or read book Abrupt Climate Change written by Peter U. Clark and published by DIANE Publishing. This book was released on 2009-09 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is part of a series of 21 Synthesis and Assessments (SAP) aimed at providing current assessments of climate change science to inform public debate, policy, and operational decisions. These reports are also intended to help develop future program research priorities. The guiding vision is to provide the Nation and the global community with the science-based knowledge needed to manage the risks and capture the opportunities associated with climate and related environmental changes. This SAP assesses abrupt climate change events where key aspects of the climate system change faster than the responsible forces would suggest and/or faster than society can respond to those changes. Illustrations.

The Two-mile Time Machine

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Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.3/5 (91 download)

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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

Abrupt Climate Change

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Publisher : National Academies Press
ISBN 13 : 0309133041
Total Pages : 252 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Abrupt Climate Change by : National Research Council

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.

Abrupt Impacts of Climate Change

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Publisher : National Academies Press
ISBN 13 : 0309287766
Total Pages : 281 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Abrupt Impacts of Climate Change by : National Research Council

Download or read book Abrupt Impacts of Climate Change written by National Research Council and published by National Academies Press. This book was released on 2013-12-31 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate is changing, forced out of the range of the past million years by levels of carbon dioxide and other greenhouse gases not seen in the Earth's atmosphere for a very, very long time. Lacking action by the world's nations, it is clear that the planet will be warmer, sea level will rise, and patterns of rainfall will change. But the future is also partly uncertain-there is considerable uncertainty about how we will arrive at that different climate. Will the changes be gradual, allowing natural systems and societal infrastructure to adjust in a timely fashion? Or will some of the changes be more abrupt, crossing some threshold or "tipping point" to change so fast that the time between when a problem is recognized and when action is required shrinks to the point where orderly adaptation is not possible? Abrupt Impacts of Climate Change is an updated look at the issue of abrupt climate change and its potential impacts. This study differs from previous treatments of abrupt changes by focusing on abrupt climate changes and also abrupt climate impacts that have the potential to severely affect the physical climate system, natural systems, or human systems, often affecting multiple interconnected areas of concern. The primary timescale of concern is years to decades. A key characteristic of these changes is that they can come faster than expected, planned, or budgeted for, forcing more reactive, rather than proactive, modes of behavior. Abrupt Impacts of Climate Change summarizes the state of our knowledge about potential abrupt changes and abrupt climate impacts and categorizes changes that are already occurring, have a high probability of occurrence, or are unlikely to occur. Because of the substantial risks to society and nature posed by abrupt changes, this report recommends the development of an Abrupt Change Early Warning System that would allow for the prediction and possible mitigation of such changes before their societal impacts are severe. Identifying key vulnerabilities can help guide efforts to increase resiliency and avoid large damages from abrupt change in the climate system, or in abrupt impacts of gradual changes in the climate system, and facilitate more informed decisions on the proper balance between mitigation and adaptation. Although there is still much to learn about abrupt climate change and abrupt climate impacts, to willfully ignore the threat of abrupt change could lead to more costs, loss of life, suffering, and environmental degradation. Abrupt Impacts of Climate Change makes the case that the time is here to be serious about the threat of tipping points so as to better anticipate and prepare ourselves for the inevitable surprises.

The Ecology of Abrupt Climate Changes During the Last Glacial Period

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Publisher :
ISBN 13 :
Total Pages : 123 pages
Book Rating : 4.:/5 (111 download)

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Book Synopsis The Ecology of Abrupt Climate Changes During the Last Glacial Period by :

Download or read book The Ecology of Abrupt Climate Changes During the Last Glacial Period written by and published by . This book was released on 2019 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modelling the Last Glacial Maximum and Abrupt Climate Changes During the Last Glacial-interglacial Cycle

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Publisher :
ISBN 13 :
Total Pages : 114 pages
Book Rating : 4.:/5 (856 download)

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Book Synopsis Modelling the Last Glacial Maximum and Abrupt Climate Changes During the Last Glacial-interglacial Cycle by : Xun Gong

Download or read book Modelling the Last Glacial Maximum and Abrupt Climate Changes During the Last Glacial-interglacial Cycle written by Xun Gong and published by . This book was released on 2012 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P.

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Publisher : Springer
ISBN 13 : 3319400002
Total Pages : 354 pages
Book Rating : 4.3/5 (194 download)

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Book Synopsis Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P. by : Germán Mariano Gasparini

Download or read book Marine Isotope Stage 3 in Southern South America, 60 KA B.P.-30 KA B.P. written by Germán Mariano Gasparini and published by Springer. This book was released on 2016-07-26 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents isotope data reflecting changes in temperature derived from core samples in South America. Marine Isotope Stage (MIS) is examined in detail with respect to Stage 3. With over 20 chapters, this detailed treatise discusses high climatic variability, paleoclimatic events, Dansgaard-Oeschger cycles, continental vertebrates, sea level changes, vegetation and climate changes based on pollen records, and the non-Amazon landscape and fauna from 65 to 20 ka B.P. The book also looks at the earth’s magnetic field and climate change during MIS 3 and MIS 5 and presents a comparison between both stages with respect to marine deposits in Uruguay. With case studies drawn from Brazil, Argentina and Uruguay this book presents research from the some of the worlds experts in this field.

The Nordic Seas

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Publisher : Springer Science & Business Media
ISBN 13 : 1461580358
Total Pages : 788 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis The Nordic Seas by : Burton G. Hurdle

Download or read book The Nordic Seas written by Burton G. Hurdle and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt: " ... as soon as one has traversed the greater part of the wild sea, one comes upon such a huge quantity of ice that nowhere in the whole world has the like been known." "This ice is of a wonderful nature. It lies at times quite still, as one would expect, with openings or large fjords in it; but sometimes its movement is so strong and rapid as to equal that of a ship running before the wind, and it drifts against the wind as often as with it." Kongespeilet - 1250 A.D. ("The Mirror of Kings") Modern societies require increasing amounts influence on the water mass and on the resulting of scientific information about the environment total environment of the region; therefore, cer tain of its characteristics will necessarily be in whieh they live and work. For the seas this information must describe the air above the sea, included.

The Change in the Climate and Its Cause

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Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis The Change in the Climate and Its Cause by : Reginald Adams Marriott

Download or read book The Change in the Climate and Its Cause written by Reginald Adams Marriott and published by . This book was released on 1914 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: