Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent
Early Holocene summer warmth drove dramatic Greenland ice sheet (GIS) retreat. Subsequent insolation-driven cooling caused GIS margin readvance to late Holocene maxima, from which ice margins are now retreating. We use Be-10 surface exposure ages from four locations between 69.4 deg N and 61.2 deg N...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20140017652 2023-05-15T16:23:27+02:00 Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent Sinclair, Gaylen Axford, Yarrow Winsor, Kelsey Rood, Dylan H. Ullman, David J. Brook, Edward J. Anslow, Faron S. LeGrande, Allegra Nicole Carlson, Anders E. Unclassified, Unlimited, Publicly available July 1, 2014 application/pdf http://hdl.handle.net/2060/20140017652 unknown Document ID: 20140017652 http://hdl.handle.net/2060/20140017652 Copyright, Distribution as joint owner in the copyright CASI Geophysics Meteorology and Climatology GSFC-E-DAA-TN17249 Geophysical Research Letters(ISSN 1944-8007); Volume 41; Issue 15; 5514–5521 2014 ftnasantrs 2016-03-12T23:55:10Z Early Holocene summer warmth drove dramatic Greenland ice sheet (GIS) retreat. Subsequent insolation-driven cooling caused GIS margin readvance to late Holocene maxima, from which ice margins are now retreating. We use Be-10 surface exposure ages from four locations between 69.4 deg N and 61.2 deg N to date when in the early Holocene south to west GIS margins retreated to within these late Holocene maximum extents. We find that this occurred at 11.1 +/- 0.2 ka to 10.6 +/- 0.5 ka in south Greenland, significantly earlier than previous estimates, and 6.8 +/- 0.1 ka to 7.9 +/- 0.1 ka in southwest to west Greenland, consistent with existing Be-10 ages. At least in south Greenland, these Be-10 ages likely provide a minimum constraint for when on a multicentury timescale summer temperatures after the last deglaciation warmed above late Holocene temperatures in the early Holocene. Current south Greenland ice margin retreat suggests that south Greenland may have now warmed to or above earliest Holocene summer temperatures. Other/Unknown Material Greenland Ice Sheet NASA Technical Reports Server (NTRS) Greenland |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Geophysics Meteorology and Climatology |
spellingShingle |
Geophysics Meteorology and Climatology Sinclair, Gaylen Axford, Yarrow Winsor, Kelsey Rood, Dylan H. Ullman, David J. Brook, Edward J. Anslow, Faron S. LeGrande, Allegra Nicole Carlson, Anders E. Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent |
topic_facet |
Geophysics Meteorology and Climatology |
description |
Early Holocene summer warmth drove dramatic Greenland ice sheet (GIS) retreat. Subsequent insolation-driven cooling caused GIS margin readvance to late Holocene maxima, from which ice margins are now retreating. We use Be-10 surface exposure ages from four locations between 69.4 deg N and 61.2 deg N to date when in the early Holocene south to west GIS margins retreated to within these late Holocene maximum extents. We find that this occurred at 11.1 +/- 0.2 ka to 10.6 +/- 0.5 ka in south Greenland, significantly earlier than previous estimates, and 6.8 +/- 0.1 ka to 7.9 +/- 0.1 ka in southwest to west Greenland, consistent with existing Be-10 ages. At least in south Greenland, these Be-10 ages likely provide a minimum constraint for when on a multicentury timescale summer temperatures after the last deglaciation warmed above late Holocene temperatures in the early Holocene. Current south Greenland ice margin retreat suggests that south Greenland may have now warmed to or above earliest Holocene summer temperatures. |
format |
Other/Unknown Material |
author |
Sinclair, Gaylen Axford, Yarrow Winsor, Kelsey Rood, Dylan H. Ullman, David J. Brook, Edward J. Anslow, Faron S. LeGrande, Allegra Nicole Carlson, Anders E. |
author_facet |
Sinclair, Gaylen Axford, Yarrow Winsor, Kelsey Rood, Dylan H. Ullman, David J. Brook, Edward J. Anslow, Faron S. LeGrande, Allegra Nicole Carlson, Anders E. |
author_sort |
Sinclair, Gaylen |
title |
Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent |
title_short |
Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent |
title_full |
Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent |
title_fullStr |
Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent |
title_full_unstemmed |
Earliest Holocene South Greenland Ice Sheet Retreat Within its Late Holocene Extent |
title_sort |
earliest holocene south greenland ice sheet retreat within its late holocene extent |
publishDate |
2014 |
url |
http://hdl.handle.net/2060/20140017652 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
CASI |
op_relation |
Document ID: 20140017652 http://hdl.handle.net/2060/20140017652 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766011705850068992 |