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Article
Ice Layers as an Indicator of Summer Warmth and Atmospheric Blocking in Alaska
Journal of Glaciology
  • Eric P. Kelsey
  • Cameron P. Wake
  • Karl J. Kreutz, University of Maine - Main
  • Erich Osterberg
Document Type
Article
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Publication Date
1-1-2010
Disciplines
Abstract/ Summary
Samples were collected from a snow pit and shallow urn core near Kahiltna Pass (2970 m a.s.l.), Denali National Park, Alaska, USA, in May 2008. The record spans autumn 2003 to spring 2008 and reveals clusters of ice layers interpreted as summertime intervals of above-freezing temperatures. High correlation coefficients (0.75-1.00) between annual ice-layer thickness and regional summertime station temperatures for 4 years (n=4) indicate ice-layer thickness is a good proxy for mean and extreme summertime temperatures across Alaska, at least over the short period of record. A Rex-block (aka high-over-low) pattern, a downstream trough over Hudson Bay, Canada, and an upstream trough over eastern Siberia occurred during the three melting events that lasted at least 2 weeks. About half of all shorter melting events were associated with a cut-off low traversing the Gulf of Alaska. We hypothesize that a surface-to-bedrock core extracted from this location would provide a high-quality record of summer temperature and atmospheric blocking variability for the last several hundred years.
Citation/Publisher Attribution
Kelsey, EP, Wake, CP, Kreutz, K, and Osterberg, E, 2010, Ice Layers as an Indicator of Summer Warmth and Atmospheric Blocking in Alaska: Journal of Glaciology, v. 56, p. 715-722. Available on publisher's site at: http://www.ingentaconnect.com/content/igsoc/jog/2010/00000056/00000198/art00015
Publisher Statement
© Copyright 2010 by the International Glaciological Society
Version
publisher's version of the published document
Citation Information
Eric P. Kelsey, Cameron P. Wake, Karl J. Kreutz and Erich Osterberg. "Ice Layers as an Indicator of Summer Warmth and Atmospheric Blocking in Alaska" Journal of Glaciology Vol. 56 Iss. 198 (2010) p. 715 - 722
Available at: http://works.bepress.com/karl_kreutz/17/