Response of a marine-terminating Greenland outlet glacier to abrupt cooling 8200 and 9300 years ago

Young, N.E., Briner, J.P., Axford, Y., Csatho, B., Babonis, G.S., Rood, D.H. and Finkel, R.C. (2011) Response of a marine-terminating Greenland outlet glacier to abrupt cooling 8200 and 9300 years ago. Geophysical Research Letters, 38(L2407), (doi: 10.1029/2011GL049639)

Abstract

Long-term records of Greenland outlet-glacier change extending beyond the satellite era can inform future predictions of Greenland Ice Sheet behavior. Of particular relevance is elucidating the Greenland Ice Sheet's response to decadal- and centennial-scale climate change. Here, we reconstruct the early Holocene history of Jakobshavn Isbræ, Greenland's largest outlet glacier, using 10Be surface exposure ages and 14C-dated lake sediments. Our chronology of ice-margin change demonstrates that Jakobshavn Isbræ advanced to deposit moraines in response to abrupt cooling recorded in central Greenland ice cores ca. 8,200 and 9,300 years ago. While the rapid, dynamically aided retreat of many Greenland outlet glaciers in response to warming is well documented, these results indicate that marine-terminating outlet glaciers are also able to respond quickly to cooling. We suggest that short lag times of high ice flux margins enable a greater magnitude response of marine-terminating outlets to abrupt climate change compared to their land-terminating counterparts.

• Item Type: Articles
• Additional Information: An edited version of this paper was published by AGU. Copyright (2011) American Geophysical Union. Author(s), (2011), 'Response of a marine-terminating Greenland outlet glacier to abrupt cooling 8200 and 9300 years ago', <i>Geophysical Research Letters</i>, 38, L2407, (10.1029/2011GL049639). To view the published open abstract, go to http://dx.doi.org and enter 10.1029/2011GL049639.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Rood, Dr Dylan
• Authors: Young, N.E., Briner, J.P., Axford, Y., Csatho, B., Babonis, G.S., Rood, D.H., and Finkel, R.C.
• College/School: College of Science and Engineering > Scottish Universities Environmental Research Centre
• Journal Name: Geophysical Research Letters
• ISSN: 0094-8276
• Copyright Holders: Copyright © 2011 American Geophysical Union
• First Published: First published in Geophysical Research Letters 38(L2407)
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher