Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records
The response of the Greenland Ice Sheet to future climate change is relatively unconstrained. Determining the extents and rates of ice-margin fluctuations during the Holocene provides a longer-term perspective on ice-sheet changes and offers an analogue of how the ice-sheet may respond to future cha...
Published in: | Arctic, Antarctic, and Alpine Research |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2018
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Online Access: | https://pure.au.dk/portal/da/publications/middle-to-late-holocene-chronology-of-the-western-margin-of-the-greenland-ice-sheet(2f3b211b-608d-408d-bca8-451122150648).html https://doi.org/10.1080/15230430.2017.1414477 https://pure.au.dk/ws/files/135683746/Middle_to_late_Holocene_chronology_of_the_western_margin_of_the_Greenland_Ice_Sheet_A_comparison_with_Holocene_temperature_and_precipitation_records.pdf |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/2f3b211b-608d-408d-bca8-451122150648 2023-05-15T14:14:39+02:00 Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records Levy, Laura B. Kelly, Meredith A. Applegate, Patrick A. Howley, Jennifer A. Virginia, Ross A. 2018 application/pdf https://pure.au.dk/portal/da/publications/middle-to-late-holocene-chronology-of-the-western-margin-of-the-greenland-ice-sheet(2f3b211b-608d-408d-bca8-451122150648).html https://doi.org/10.1080/15230430.2017.1414477 https://pure.au.dk/ws/files/135683746/Middle_to_late_Holocene_chronology_of_the_western_margin_of_the_Greenland_Ice_Sheet_A_comparison_with_Holocene_temperature_and_precipitation_records.pdf eng eng info:eu-repo/semantics/openAccess Levy , L B , Kelly , M A , Applegate , P A , Howley , J A & Virginia , R A 2018 , ' Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet : A comparison with Holocene temperature and precipitation records ' , Arctic, Antarctic, and Alpine Research , vol. 50 , no. 1 , e1414477 . https://doi.org/10.1080/15230430.2017.1414477 Be dating Greenland Holocene moraines article 2018 ftuniaarhuspubl https://doi.org/10.1080/15230430.2017.1414477 2022-03-30T22:51:06Z The response of the Greenland Ice Sheet to future climate change is relatively unconstrained. Determining the extents and rates of ice-margin fluctuations during the Holocene provides a longer-term perspective on ice-sheet changes and offers an analogue of how the ice-sheet may respond to future changes. Here, we present sixteen new 10 Be ages of boulders on moraines, boulders perched on bedrock, and bedrock surfaces that mark the timing of ice-margin fluctuations during the Holocene in the Kangerlussuaq region of southern west Greenland. We show that the Keglen moraines date to 8.0 ± 0.3 ka (n = 6) and that the average ice-margin retreat rate slowed from about 49 to 13 m yr −1 after about 8.0 ka, likely in response to the ice margin retreating onto land at the head of the fjord Kangerlussuaq at this time. The average retreat rate further slowed to less than 1 m yr −1 between 6.8 ka and 4.2 cal kyr BP, a time when nearby paleoclimate records document warm summers and increased precipitation. Finally, we show that the historical advances of the ice margin occurred during the past 200 years, likely in response to cooler summer temperatures. Article in Journal/Newspaper Antarctic and Alpine Research Arctic Greenland Ice Sheet Kangerlussuaq Aarhus University: Research Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) Keglen ENVELOPE(-32.067,-32.067,67.867,67.867) Arctic, Antarctic, and Alpine Research 50 1 S100004 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Be dating Greenland Holocene moraines |
spellingShingle |
Be dating Greenland Holocene moraines Levy, Laura B. Kelly, Meredith A. Applegate, Patrick A. Howley, Jennifer A. Virginia, Ross A. Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records |
topic_facet |
Be dating Greenland Holocene moraines |
description |
The response of the Greenland Ice Sheet to future climate change is relatively unconstrained. Determining the extents and rates of ice-margin fluctuations during the Holocene provides a longer-term perspective on ice-sheet changes and offers an analogue of how the ice-sheet may respond to future changes. Here, we present sixteen new 10 Be ages of boulders on moraines, boulders perched on bedrock, and bedrock surfaces that mark the timing of ice-margin fluctuations during the Holocene in the Kangerlussuaq region of southern west Greenland. We show that the Keglen moraines date to 8.0 ± 0.3 ka (n = 6) and that the average ice-margin retreat rate slowed from about 49 to 13 m yr −1 after about 8.0 ka, likely in response to the ice margin retreating onto land at the head of the fjord Kangerlussuaq at this time. The average retreat rate further slowed to less than 1 m yr −1 between 6.8 ka and 4.2 cal kyr BP, a time when nearby paleoclimate records document warm summers and increased precipitation. Finally, we show that the historical advances of the ice margin occurred during the past 200 years, likely in response to cooler summer temperatures. |
format |
Article in Journal/Newspaper |
author |
Levy, Laura B. Kelly, Meredith A. Applegate, Patrick A. Howley, Jennifer A. Virginia, Ross A. |
author_facet |
Levy, Laura B. Kelly, Meredith A. Applegate, Patrick A. Howley, Jennifer A. Virginia, Ross A. |
author_sort |
Levy, Laura B. |
title |
Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records |
title_short |
Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records |
title_full |
Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records |
title_fullStr |
Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records |
title_full_unstemmed |
Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet:A comparison with Holocene temperature and precipitation records |
title_sort |
middle to late holocene chronology of the western margin of the greenland ice sheet:a comparison with holocene temperature and precipitation records |
publishDate |
2018 |
url |
https://pure.au.dk/portal/da/publications/middle-to-late-holocene-chronology-of-the-western-margin-of-the-greenland-ice-sheet(2f3b211b-608d-408d-bca8-451122150648).html https://doi.org/10.1080/15230430.2017.1414477 https://pure.au.dk/ws/files/135683746/Middle_to_late_Holocene_chronology_of_the_western_margin_of_the_Greenland_Ice_Sheet_A_comparison_with_Holocene_temperature_and_precipitation_records.pdf |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) ENVELOPE(-32.067,-32.067,67.867,67.867) |
geographic |
Greenland Kangerlussuaq Keglen |
geographic_facet |
Greenland Kangerlussuaq Keglen |
genre |
Antarctic and Alpine Research Arctic Greenland Ice Sheet Kangerlussuaq |
genre_facet |
Antarctic and Alpine Research Arctic Greenland Ice Sheet Kangerlussuaq |
op_source |
Levy , L B , Kelly , M A , Applegate , P A , Howley , J A & Virginia , R A 2018 , ' Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet : A comparison with Holocene temperature and precipitation records ' , Arctic, Antarctic, and Alpine Research , vol. 50 , no. 1 , e1414477 . https://doi.org/10.1080/15230430.2017.1414477 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1080/15230430.2017.1414477 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
50 |
container_issue |
1 |
container_start_page |
S100004 |
_version_ |
1766286999664197632 |