Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet
Abstract The now acknowledged thinning of the Greenland Ice Sheet raises concerns about its potential contribution to future sea level rise. In order to appreciate the full extent of its contribution to sea level rise, reconstruction of the ice sheet's most recent last deglaciation could provid...
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crwiley:10.1002/jqs.1226 2024-06-02T08:07:03+00:00 Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet Rinterknecht, Vincent Gorokhovich, Yuri Schaefer, Joerg Caffee, Marc 2008 http://dx.doi.org/10.1002/jqs.1226 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1226 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1226 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 24, issue 3, page 270-278 ISSN 0267-8179 1099-1417 journal-article 2008 crwiley https://doi.org/10.1002/jqs.1226 2024-05-03T11:45:57Z Abstract The now acknowledged thinning of the Greenland Ice Sheet raises concerns about its potential contribution to future sea level rise. In order to appreciate the full extent of its contribution to sea level rise, reconstruction of the ice sheet's most recent last deglaciation could provide key information on the timing and the height of the ice sheet at a time of rapid climate readjustment. We measured 10 Be concentrations in 12 samples collected along longitudinal and altitudinal transects from Sisimiut to within 10 km of the Isunguata Sermia Glacier ice margin on the western coast of Greenland. Along the longitudinal transect, we collected three perched boulders and two bedrocks. In addition, we sampled seven perched boulders along a vertical transect in a valley within 10 km of the Isunguata Sermia Glacier ice margin. Our pilot dataset constrains the height of the ice sheet during the Last Glacial Maximum (LGM) between 500 m and 840 m (including the 120 m relative sea level depression at the time of the LGM, 21 ka BP). From the transect we estimate the thinning of the ice sheet at the end of the deglaciation between 12.3 ± 1.5 10 Be ka ( n = 2) and 8.3 ± 1.2 10 Be ka ( n = 3) to be ∼6 cm a −1 over this time period. Direct dating of the retreat of the western margin of the Greenland Ice Sheet has the potential to better constrain the retreat rate of the ice margin, the thickness of the former ice sheet as well as its response to climate change. Copyright © 2008 John Wiley & Sons, Ltd. Article in Journal/Newspaper glacier Greenland Ice Sheet Sisimiut Wiley Online Library Greenland Sisimiut ENVELOPE(-53.674,-53.674,66.939,66.939) Journal of Quaternary Science 24 3 270 278 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The now acknowledged thinning of the Greenland Ice Sheet raises concerns about its potential contribution to future sea level rise. In order to appreciate the full extent of its contribution to sea level rise, reconstruction of the ice sheet's most recent last deglaciation could provide key information on the timing and the height of the ice sheet at a time of rapid climate readjustment. We measured 10 Be concentrations in 12 samples collected along longitudinal and altitudinal transects from Sisimiut to within 10 km of the Isunguata Sermia Glacier ice margin on the western coast of Greenland. Along the longitudinal transect, we collected three perched boulders and two bedrocks. In addition, we sampled seven perched boulders along a vertical transect in a valley within 10 km of the Isunguata Sermia Glacier ice margin. Our pilot dataset constrains the height of the ice sheet during the Last Glacial Maximum (LGM) between 500 m and 840 m (including the 120 m relative sea level depression at the time of the LGM, 21 ka BP). From the transect we estimate the thinning of the ice sheet at the end of the deglaciation between 12.3 ± 1.5 10 Be ka ( n = 2) and 8.3 ± 1.2 10 Be ka ( n = 3) to be ∼6 cm a −1 over this time period. Direct dating of the retreat of the western margin of the Greenland Ice Sheet has the potential to better constrain the retreat rate of the ice margin, the thickness of the former ice sheet as well as its response to climate change. Copyright © 2008 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Rinterknecht, Vincent Gorokhovich, Yuri Schaefer, Joerg Caffee, Marc |
spellingShingle |
Rinterknecht, Vincent Gorokhovich, Yuri Schaefer, Joerg Caffee, Marc Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet |
author_facet |
Rinterknecht, Vincent Gorokhovich, Yuri Schaefer, Joerg Caffee, Marc |
author_sort |
Rinterknecht, Vincent |
title |
Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet |
title_short |
Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet |
title_full |
Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet |
title_fullStr |
Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet |
title_full_unstemmed |
Preliminary 10 Be chronology for the last deglaciation of the western margin of the Greenland Ice Sheet |
title_sort |
preliminary 10 be chronology for the last deglaciation of the western margin of the greenland ice sheet |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1002/jqs.1226 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1226 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1226 |
long_lat |
ENVELOPE(-53.674,-53.674,66.939,66.939) |
geographic |
Greenland Sisimiut |
geographic_facet |
Greenland Sisimiut |
genre |
glacier Greenland Ice Sheet Sisimiut |
genre_facet |
glacier Greenland Ice Sheet Sisimiut |
op_source |
Journal of Quaternary Science volume 24, issue 3, page 270-278 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1226 |
container_title |
Journal of Quaternary Science |
container_volume |
24 |
container_issue |
3 |
container_start_page |
270 |
op_container_end_page |
278 |
_version_ |
1800752059434139648 |