Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland.
In this study, we present new information on the glacial history of the Greenland Ice Sheet (GrIS) and a local ice cap in Qaanaaq, northwest Greenland. We use geomorphological mapping, 10Be exposure dating of boulders, analysis of lake cores, and 14C dating of reworked marine molluscs and subfossil...
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:28914 2023-05-15T16:26:01+02:00 Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. Søndergaard, A.S. Larsen, N.K. Olsen, J. Strunk, A. Woodroffe, S.A. 2019-10-31 application/pdf http://dro.dur.ac.uk/28914/ http://dro.dur.ac.uk/28914/1/28914.pdf https://doi.org/10.1002/jqs.3139 unknown John Wiley dro:28914 issn:1099-1417 doi:10.1002/jqs.3139 http://dro.dur.ac.uk/28914/ https://doi.org/10.1002/jqs.3139 http://dro.dur.ac.uk/28914/1/28914.pdf This is the accepted version of the following article: Søndergaard, A.S. Larsen, N.K. Olsen, J. Strunk, A. & Woodroffe, S.A. (2019). Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. Journal of Quaternary Science 34(7): 536-547 which has been published in final form at https://doi.org/10.1002/jqs.3139. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for self-archiving. Journal of quaternary science, 2019, Vol.34(7), pp.536-547 [Peer Reviewed Journal] Article PeerReviewed 2019 ftunivdurham https://doi.org/10.1002/jqs.3139 2020-09-03T22:22:55Z In this study, we present new information on the glacial history of the Greenland Ice Sheet (GrIS) and a local ice cap in Qaanaaq, northwest Greenland. We use geomorphological mapping, 10Be exposure dating of boulders, analysis of lake cores, and 14C dating of reworked marine molluscs and subfossil plants to constrain the glacial history. Our 14C ages of reworked marine molluscs reveal that the ice extent in the area was at or behind its present‐day position from 42.2 ± 0.4 to 30.6 ± 0.3k cal a BP after which the GrIS expanded to its maximum position during the Last Glacial Maximum. We find evidence of early ice retreat in the deep fjord (Inglefield Bredning) at 11.9 ± 0.6 ka whereas the Taserssuit Valley was deglaciated ~4 ka later at 7.8 ± 0.1k cal a BP. A proglacial lake record suggests that the local ice cap survived the Holocene Thermal Maximum but moss kill‐dates reveal that it was smaller than present for a period of time before 3.3 ± 0.1k until 0.9 ± 0.1k cal a BP, following which the ice in the area expanded towards its Little Ice Age extent. Article in Journal/Newspaper Greenland Ice cap Ice Sheet Qaanaaq Durham University: Durham Research Online Greenland Inglefield Bredning ENVELOPE(-67.804,-67.804,77.454,77.454) Qaanaaq ENVELOPE(-69.232,-69.232,77.467,77.467) Journal of Quaternary Science 34 7 536 547 |
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Open Polar |
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Durham University: Durham Research Online |
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ftunivdurham |
language |
unknown |
description |
In this study, we present new information on the glacial history of the Greenland Ice Sheet (GrIS) and a local ice cap in Qaanaaq, northwest Greenland. We use geomorphological mapping, 10Be exposure dating of boulders, analysis of lake cores, and 14C dating of reworked marine molluscs and subfossil plants to constrain the glacial history. Our 14C ages of reworked marine molluscs reveal that the ice extent in the area was at or behind its present‐day position from 42.2 ± 0.4 to 30.6 ± 0.3k cal a BP after which the GrIS expanded to its maximum position during the Last Glacial Maximum. We find evidence of early ice retreat in the deep fjord (Inglefield Bredning) at 11.9 ± 0.6 ka whereas the Taserssuit Valley was deglaciated ~4 ka later at 7.8 ± 0.1k cal a BP. A proglacial lake record suggests that the local ice cap survived the Holocene Thermal Maximum but moss kill‐dates reveal that it was smaller than present for a period of time before 3.3 ± 0.1k until 0.9 ± 0.1k cal a BP, following which the ice in the area expanded towards its Little Ice Age extent. |
format |
Article in Journal/Newspaper |
author |
Søndergaard, A.S. Larsen, N.K. Olsen, J. Strunk, A. Woodroffe, S.A. |
spellingShingle |
Søndergaard, A.S. Larsen, N.K. Olsen, J. Strunk, A. Woodroffe, S.A. Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. |
author_facet |
Søndergaard, A.S. Larsen, N.K. Olsen, J. Strunk, A. Woodroffe, S.A. |
author_sort |
Søndergaard, A.S. |
title |
Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. |
title_short |
Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. |
title_full |
Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. |
title_fullStr |
Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. |
title_full_unstemmed |
Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. |
title_sort |
glacial history of the greenland ice sheet and a local ice cap in qaanaaq, northwest greenland. |
publisher |
John Wiley |
publishDate |
2019 |
url |
http://dro.dur.ac.uk/28914/ http://dro.dur.ac.uk/28914/1/28914.pdf https://doi.org/10.1002/jqs.3139 |
long_lat |
ENVELOPE(-67.804,-67.804,77.454,77.454) ENVELOPE(-69.232,-69.232,77.467,77.467) |
geographic |
Greenland Inglefield Bredning Qaanaaq |
geographic_facet |
Greenland Inglefield Bredning Qaanaaq |
genre |
Greenland Ice cap Ice Sheet Qaanaaq |
genre_facet |
Greenland Ice cap Ice Sheet Qaanaaq |
op_source |
Journal of quaternary science, 2019, Vol.34(7), pp.536-547 [Peer Reviewed Journal] |
op_relation |
dro:28914 issn:1099-1417 doi:10.1002/jqs.3139 http://dro.dur.ac.uk/28914/ https://doi.org/10.1002/jqs.3139 http://dro.dur.ac.uk/28914/1/28914.pdf |
op_rights |
This is the accepted version of the following article: Søndergaard, A.S. Larsen, N.K. Olsen, J. Strunk, A. & Woodroffe, S.A. (2019). Glacial history of the Greenland Ice Sheet and a local ice cap in Qaanaaq, northwest Greenland. Journal of Quaternary Science 34(7): 536-547 which has been published in final form at https://doi.org/10.1002/jqs.3139. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for self-archiving. |
op_doi |
https://doi.org/10.1002/jqs.3139 |
container_title |
Journal of Quaternary Science |
container_volume |
34 |
container_issue |
7 |
container_start_page |
536 |
op_container_end_page |
547 |
_version_ |
1766014889360359424 |