Cordilleran Ice Sheet mass loss preceded climate reversals near the Pleistocene Termination

Disappearance of an ice sheet The Cordilleran Ice Sheet is thought to have covered westernmost Canada until about 13,000 years ago, even though the warming and sea level rise of the last deglaciation had begun more than a thousand years earlier. This out-of-phase behavior has puzzled glaciologists b...

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Bibliographic Details
Published in:Science
Main Authors: Menounos, B., Goehring, B. M., Osborn, G., Margold, M., Ward, B., Bond, J., Clarke, G. K. C., Clague, J. J., Lakeman, T., Koch, J., Caffee, M. W., Gosse, J., Stroeven, A. P., Seguinot, J., Heyman, J.
Other Authors: Natural Sciences and Engineering Research Council of Canada, Canada Research Chairs
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2017
Subjects:
Canada
glacier*
Ice Sheet
Online Access:http://dx.doi.org/10.1126/science.aan3001
https://syndication.highwire.org/content/doi/10.1126/science.aan3001
https://www.science.org/doi/pdf/10.1126/science.aan3001
Description
Summary:Disappearance of an ice sheet The Cordilleran Ice Sheet is thought to have covered westernmost Canada until about 13,000 years ago, even though the warming and sea level rise of the last deglaciation had begun more than a thousand years earlier. This out-of-phase behavior has puzzled glaciologists because it is not clear what mechanisms could account for it. Menounos et al. report measurements of the ages of cirque and valley glaciers that show that much of western Canada was ice-free as early as 14,000 years ago—a finding that better agrees with the record of global ice volume (see the Perspective by Marcott and Shakun). Previous reconstructions seem not to have adequately reflected the complexity of ice sheet decay. Science , this issue p. 781 see also p. 721

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