Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland
There is a lack of detailed information on the Holocene evolution of the west Greenland ice margin, not least because it was farther inland than at present and thus at present is covered by ice. Suggestions have been put forward, both of relatively quick ice-margin retreat and of relatively stable i...
Published in: | Arctic, Antarctic, and Alpine Research |
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Language: | English |
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2018
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Online Access: | https://pure.au.dk/portal/da/publications/icedammed-lake-and-icemargin-evolution-during-the-holocene-in-the-kangerlussuaq-area-of-west-greenland(d25baaba-a506-430d-ab3e-607fbb8b815c).html https://doi.org/10.1080/15230430.2017.1420854 https://pure.au.dk/ws/files/135683380/Ice_dammed_lake_and_ice_margin_evolution_during_the_Holocene_in_the_Kangerlussuaq_area_of_west_Greenland.pdf |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/d25baaba-a506-430d-ab3e-607fbb8b815c 2023-05-15T14:14:36+02:00 Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland Carrivick, Jonathan L. Yde, Jacob C. Knudsen, Niels Tvis Kronborg, Christian 2018 application/pdf https://pure.au.dk/portal/da/publications/icedammed-lake-and-icemargin-evolution-during-the-holocene-in-the-kangerlussuaq-area-of-west-greenland(d25baaba-a506-430d-ab3e-607fbb8b815c).html https://doi.org/10.1080/15230430.2017.1420854 https://pure.au.dk/ws/files/135683380/Ice_dammed_lake_and_ice_margin_evolution_during_the_Holocene_in_the_Kangerlussuaq_area_of_west_Greenland.pdf eng eng info:eu-repo/semantics/openAccess Carrivick , J L , Yde , J C , Knudsen , N T & Kronborg , C 2018 , ' Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland ' , Arctic, Antarctic, and Alpine Research , vol. 50 , no. 1 , e1420854 . https://doi.org/10.1080/15230430.2017.1420854 Arctic glacier ice sheet meltwater proglacial article 2018 ftuniaarhuspubl https://doi.org/10.1080/15230430.2017.1420854 2023-01-04T23:55:26Z There is a lack of detailed information on the Holocene evolution of the west Greenland ice margin, not least because it was farther inland than at present and thus at present is covered by ice. Suggestions have been put forward, both of relatively quick ice-margin retreat and of relatively stable ice-margin positions. This study presents the first exploitation of sediments from an ice-dammed basin. Sediment that is rich in organic material records a period of time sufficient for vegetation to thrive; thus, without a lake and with a distal and diminished ice mass relative to the present. In contrast, sediment composed of suspension-settling deposits and with drop stones records an ice-dammed lake and a proximal calving ice-margin. Overall, we evidence relatively coarse-grained glacifluvial sedimentation predominantly from an ice-marginal delta and/or a proglacial, braided river soon after the early Holocene deglaciation of this area. Subsequent mid-Holocene aeolian activity deposited leaves, some vegetation (roots) developed in the basin, and ponding of water formed organic-rich “gyttja” sediments and thin layers of peat. The lake then became ice marginal, and ice advances are interpreted to have occurred at approximately 4000 cal. yr BP, and between 2776 ± 26 cal. yr BP and 2440 ± 45 cal. yr BP. The Little Ice Age ice-margin advance at Russell Glacier apparently reached its maximum extent after 147 ± 39 cal. yr BP, whereas at Isunnguata Sermia the maximum could have been as early as 245 ± 26 cal. yr BP. Given that ice-marginal lakes are becoming globally ubiquitous, improved resolution and new geological data on lake and ice-margin dynamics and interactions, such as ice-dammed lake-basin sediments, will be important for numerical models for assessing past and future ice-mass evolution. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Arctic glacier Greenland Ice Sheet Kangerlussuaq Aarhus University: Research Arctic Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Greenland Isunnguata Sermia ENVELOPE(-50.167,-50.167,67.183,67.183) Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Arctic, Antarctic, and Alpine Research 50 1 S100005 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Arctic glacier ice sheet meltwater proglacial |
spellingShingle |
Arctic glacier ice sheet meltwater proglacial Carrivick, Jonathan L. Yde, Jacob C. Knudsen, Niels Tvis Kronborg, Christian Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland |
topic_facet |
Arctic glacier ice sheet meltwater proglacial |
description |
There is a lack of detailed information on the Holocene evolution of the west Greenland ice margin, not least because it was farther inland than at present and thus at present is covered by ice. Suggestions have been put forward, both of relatively quick ice-margin retreat and of relatively stable ice-margin positions. This study presents the first exploitation of sediments from an ice-dammed basin. Sediment that is rich in organic material records a period of time sufficient for vegetation to thrive; thus, without a lake and with a distal and diminished ice mass relative to the present. In contrast, sediment composed of suspension-settling deposits and with drop stones records an ice-dammed lake and a proximal calving ice-margin. Overall, we evidence relatively coarse-grained glacifluvial sedimentation predominantly from an ice-marginal delta and/or a proglacial, braided river soon after the early Holocene deglaciation of this area. Subsequent mid-Holocene aeolian activity deposited leaves, some vegetation (roots) developed in the basin, and ponding of water formed organic-rich “gyttja” sediments and thin layers of peat. The lake then became ice marginal, and ice advances are interpreted to have occurred at approximately 4000 cal. yr BP, and between 2776 ± 26 cal. yr BP and 2440 ± 45 cal. yr BP. The Little Ice Age ice-margin advance at Russell Glacier apparently reached its maximum extent after 147 ± 39 cal. yr BP, whereas at Isunnguata Sermia the maximum could have been as early as 245 ± 26 cal. yr BP. Given that ice-marginal lakes are becoming globally ubiquitous, improved resolution and new geological data on lake and ice-margin dynamics and interactions, such as ice-dammed lake-basin sediments, will be important for numerical models for assessing past and future ice-mass evolution. |
format |
Article in Journal/Newspaper |
author |
Carrivick, Jonathan L. Yde, Jacob C. Knudsen, Niels Tvis Kronborg, Christian |
author_facet |
Carrivick, Jonathan L. Yde, Jacob C. Knudsen, Niels Tvis Kronborg, Christian |
author_sort |
Carrivick, Jonathan L. |
title |
Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland |
title_short |
Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland |
title_full |
Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland |
title_fullStr |
Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland |
title_full_unstemmed |
Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland |
title_sort |
ice-dammed lake and ice-margin evolution during the holocene in the kangerlussuaq area of west greenland |
publishDate |
2018 |
url |
https://pure.au.dk/portal/da/publications/icedammed-lake-and-icemargin-evolution-during-the-holocene-in-the-kangerlussuaq-area-of-west-greenland(d25baaba-a506-430d-ab3e-607fbb8b815c).html https://doi.org/10.1080/15230430.2017.1420854 https://pure.au.dk/ws/files/135683380/Ice_dammed_lake_and_ice_margin_evolution_during_the_Holocene_in_the_Kangerlussuaq_area_of_west_Greenland.pdf |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(-50.167,-50.167,67.183,67.183) ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Arctic Dammed Lake Greenland Isunnguata Sermia Kangerlussuaq |
geographic_facet |
Arctic Dammed Lake Greenland Isunnguata Sermia Kangerlussuaq |
genre |
Antarctic and Alpine Research Arctic Arctic glacier Greenland Ice Sheet Kangerlussuaq |
genre_facet |
Antarctic and Alpine Research Arctic Arctic glacier Greenland Ice Sheet Kangerlussuaq |
op_source |
Carrivick , J L , Yde , J C , Knudsen , N T & Kronborg , C 2018 , ' Ice-dammed lake and ice-margin evolution during the Holocene in the Kangerlussuaq area of west Greenland ' , Arctic, Antarctic, and Alpine Research , vol. 50 , no. 1 , e1420854 . https://doi.org/10.1080/15230430.2017.1420854 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1080/15230430.2017.1420854 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
50 |
container_issue |
1 |
container_start_page |
S100005 |
_version_ |
1766286979419340800 |