February 11, 2018

New PDF release: Abrupt Climate Change. Mechanisms, Patterns, and Impacts

By Harunur Rashid, Leonid Polyak, Ellen Mosley-Thompson

ISBN-10: 111867152X

ISBN-13: 9781118671528

Published through the yank Geophysical Union as a part of the Geophysical Monograph Series.Abrupt weather switch: Mechanisms, styles, and Impacts brings jointly a various workforce of paleoproxy documents corresponding to ice cores, marine sediments, terrestrial (lakes and speleothems) documents, and matched ocean-atmosphere weather types to rfile fresh advances in realizing the mechanisms of abrupt weather alterations. because the discovery of the Dansgaard-Oeschger occasions in Greenland ice cores and the following discovery in their modern occasions within the marine sediments of the North Atlantic, the hunt for those abrupt, millennial-scale occasions around the globe has intensified, and for this reason, the variety of paleoclimatic documents chronicling such occasions has elevated. the amount highlights contain discussions of documents of previous weather variability, meridional overturning...

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Additional resources for Abrupt Climate Change. Mechanisms, Patterns, and Impacts

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A. P. 1029/2004PA001074. Kennett, J. , K. G. Cannariato, I. L. Hendy, and R. J. Behl (2003), Methane Hydrates in Quaternary Climate Change: The Clathrate Gun Hypothesis, AGU, Washington, D. C. , M. Werner, and G. Lohmann (2011), Synchronicity of Antarctic temperatures and local solar insolation on orbital timescales, Nature, 471, 91–94. , C. F. M. Lewis, and A. A. L. Miller (2011), The impact of the final Lake Agassiz flood recorded in northeast Newfoundland and northern Scotian shelves based on century-scale palynological data, in Abrupt Climate Change: Mechanisms, Patterns, and Impacts, Geophys.

Surprisingly, a similar relationship was found between methane-synchronized temperature proxies from Greenland and East Antarctic ice core records [Blunier and Brook, 2001]. , 2002]. To summarize up-to-date results on abrupt climate events of the last glacial cycle, Figures 1 and 2 show records representative of the global climate during this period. These records were selected based on the geographic location and temporal resolution adequate to assess millennial- or finerscale climate events. Regardless of the nature of climate archives, the climatic expression of the D-O cycles is evident from the southwest Pacific Ocean to northeastern Siberia.

Hypothesize that if the fresh water discharged through Hudson Strait was admixed with fine-grained detrital carbonates, it would form a hyperpycnal flow transported through the deep Labrador Sea Northwest Atlantic Mid-Ocean Channel to distal sites of the NW Atlantic Ocean such as the Sohm Abyssal Plain. With the release of entrained sediment, fresh water from the hyperpycnal flow would buoyantly rise and lose its signature by mixing with the ambient sea water. This mechanism explains a lack of YD δ18O depletion in sediment cores retrieved from the NW Atlantic.

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Abrupt Climate Change. Mechanisms, Patterns, and Impacts by Harunur Rashid, Leonid Polyak, Ellen Mosley-Thompson


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