Contrasting evidence of Holocene ice margin retreat, south‐western Greenland
ABSTRACT Constraining the Greenland Ice Sheet's (GrIS) response to Holocene climate change provides calibrations for ice sheet models that hindcast past ice margin fluctuations. Ice sheet models predict enhanced ice retreat in south‐western Greenland during the middle Holocene; however, few geo...
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crwiley:10.1002/jqs.2957 2024-06-02T08:07:09+00:00 Contrasting evidence of Holocene ice margin retreat, south‐western Greenland Levy, L. B. Larsen, N. K. Davidson, T. A. Strunk, A. Olsen, J. Jeppesen, E. Villum and Carlsberg Foundations Polar Geospatial Center 2017 http://dx.doi.org/10.1002/jqs.2957 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2957 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2957 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 32, issue 5, page 604-616 ISSN 0267-8179 1099-1417 journal-article 2017 crwiley https://doi.org/10.1002/jqs.2957 2024-05-03T10:43:16Z ABSTRACT Constraining the Greenland Ice Sheet's (GrIS) response to Holocene climate change provides calibrations for ice sheet models that hindcast past ice margin fluctuations. Ice sheet models predict enhanced ice retreat in south‐western Greenland during the middle Holocene; however, few geological observations corroborating the extensive retreat are available. We present new data from lake sediment cores from the Isua region, south‐western Greenland, which provide constraints on Holocene fluctuations of the GrIS margins. Our data indicate that the main GrIS margin was 30 km west of its present‐day extent by ∼5.7k cal a BP and had retreated to within 3 km of its present‐day margin by ∼4.6k cal a BP; with subsequent re‐advances by ∼1.8 and at ∼1.7, ∼1.3 and ∼0.5k cal a BP. Times of ice retreat are coeval with increasing temperatures in western Greenland, suggesting that temperature was a dominant factor in ice retreat. The late retreat at Isua is in contrast to the early retreat observed in the Godthåbsfjord area and is probably related to the lack of fjords extending to the present Isua ice margin. Our data are not consistent with current ice sheet models that overestimate the middle Holocene ice retreat in the Isua region of south‐western Greenland. Article in Journal/Newspaper Godthåbsfjord Greenland Ice Sheet Wiley Online Library Greenland Journal of Quaternary Science 32 5 604 616 |
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Wiley Online Library |
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crwiley |
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English |
description |
ABSTRACT Constraining the Greenland Ice Sheet's (GrIS) response to Holocene climate change provides calibrations for ice sheet models that hindcast past ice margin fluctuations. Ice sheet models predict enhanced ice retreat in south‐western Greenland during the middle Holocene; however, few geological observations corroborating the extensive retreat are available. We present new data from lake sediment cores from the Isua region, south‐western Greenland, which provide constraints on Holocene fluctuations of the GrIS margins. Our data indicate that the main GrIS margin was 30 km west of its present‐day extent by ∼5.7k cal a BP and had retreated to within 3 km of its present‐day margin by ∼4.6k cal a BP; with subsequent re‐advances by ∼1.8 and at ∼1.7, ∼1.3 and ∼0.5k cal a BP. Times of ice retreat are coeval with increasing temperatures in western Greenland, suggesting that temperature was a dominant factor in ice retreat. The late retreat at Isua is in contrast to the early retreat observed in the Godthåbsfjord area and is probably related to the lack of fjords extending to the present Isua ice margin. Our data are not consistent with current ice sheet models that overestimate the middle Holocene ice retreat in the Isua region of south‐western Greenland. |
author2 |
Villum and Carlsberg Foundations Polar Geospatial Center |
format |
Article in Journal/Newspaper |
author |
Levy, L. B. Larsen, N. K. Davidson, T. A. Strunk, A. Olsen, J. Jeppesen, E. |
spellingShingle |
Levy, L. B. Larsen, N. K. Davidson, T. A. Strunk, A. Olsen, J. Jeppesen, E. Contrasting evidence of Holocene ice margin retreat, south‐western Greenland |
author_facet |
Levy, L. B. Larsen, N. K. Davidson, T. A. Strunk, A. Olsen, J. Jeppesen, E. |
author_sort |
Levy, L. B. |
title |
Contrasting evidence of Holocene ice margin retreat, south‐western Greenland |
title_short |
Contrasting evidence of Holocene ice margin retreat, south‐western Greenland |
title_full |
Contrasting evidence of Holocene ice margin retreat, south‐western Greenland |
title_fullStr |
Contrasting evidence of Holocene ice margin retreat, south‐western Greenland |
title_full_unstemmed |
Contrasting evidence of Holocene ice margin retreat, south‐western Greenland |
title_sort |
contrasting evidence of holocene ice margin retreat, south‐western greenland |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/jqs.2957 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.2957 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.2957 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Godthåbsfjord Greenland Ice Sheet |
genre_facet |
Godthåbsfjord Greenland Ice Sheet |
op_source |
Journal of Quaternary Science volume 32, issue 5, page 604-616 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.2957 |
container_title |
Journal of Quaternary Science |
container_volume |
32 |
container_issue |
5 |
container_start_page |
604 |
op_container_end_page |
616 |
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1800752162272182272 |