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A change in seasonality in Greenland during a Dansgaard–Oeschger warming

Thomas, Elizabeth R.; Mulvaney, Robert; Wolff, Eric W.. 2008 A change in seasonality in Greenland during a Dansgaard–Oeschger warming. Annals of Glaciology, 48. 19-24. 10.3189/172756408784700590

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Abstract/Summary

A new sub-seasonal chemical record is presented from the North Greenland Icecore Project (NorthGRIP) ice core during the onset of one of the longest and strongest interstadials of the last glacial period, Dansgaard–Oeschger event 8 (approximately 38 000 years ago). This is the first time that a record of such resolution has been achieved over several metres of deep glacial ice and provides a unique opportunity for using additional parameters to carry out accurate dating using annual-layer counting. The very high-resolution chemical data were used to assess the phasing of various ions and determine changes in the seasonal strength of chemical deposition and the shape of the seasonal cycle. The study shows that a change in seasonality accompanied the dramatic warming transition from stadial to interstadial conditions in Greenland.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.3189/172756408784700590
Programmes: BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Climate and Chemistry - Forcings and Phasings in the Earth System
ISSN: 0260-3055
Additional Keywords: Ice cores
NORA Subject Terms: Meteorology and Climatology
Glaciology
Date made live: 06 Apr 2009 15:31
URI: http://nora.nerc.ac.uk/id/eprint/3268

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