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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2018
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Online Access: | https://doi.org/10.1080/15230430.2017.1414477 https://doaj.org/article/991d029e4e404876b2b229652770f6b9 |
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ftdoajarticles:oai:doaj.org/article:991d029e4e404876b2b229652770f6b9 2023-05-15T14:14:30+02:00 Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet: A comparison with Holocene temperature and precipitation records Laura B. Levy Meredith A. Kelly Patrick A. Applegate Jennifer A. Howley Ross A. Virginia 2018-01-01T00:00:00Z https://doi.org/10.1080/15230430.2017.1414477 https://doaj.org/article/991d029e4e404876b2b229652770f6b9 EN eng Taylor & Francis Group http://dx.doi.org/10.1080/15230430.2017.1414477 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2017.1414477 https://doaj.org/article/991d029e4e404876b2b229652770f6b9 Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) greenland holocene moraines 10be dating Environmental sciences GE1-350 Ecology QH540-549.5 article 2018 ftdoajarticles https://doi.org/10.1080/15230430.2017.1414477 2022-12-31T10:49:39Z 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 10Be 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 Directory of Open Access Journals: DOAJ Articles 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 |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
greenland holocene moraines 10be dating Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
greenland holocene moraines 10be dating Environmental sciences GE1-350 Ecology QH540-549.5 Laura B. Levy Meredith A. Kelly Patrick A. Applegate Jennifer A. Howley Ross A. Virginia Middle to late Holocene chronology of the western margin of the Greenland Ice Sheet: A comparison with Holocene temperature and precipitation records |
topic_facet |
greenland holocene moraines 10be dating Environmental sciences GE1-350 Ecology QH540-549.5 |
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 10Be 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 |
Laura B. Levy Meredith A. Kelly Patrick A. Applegate Jennifer A. Howley Ross A. Virginia |
author_facet |
Laura B. Levy Meredith A. Kelly Patrick A. Applegate Jennifer A. Howley Ross A. Virginia |
author_sort |
Laura B. Levy |
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 |
publisher |
Taylor & Francis Group |
publishDate |
2018 |
url |
https://doi.org/10.1080/15230430.2017.1414477 https://doaj.org/article/991d029e4e404876b2b229652770f6b9 |
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 |
Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) |
op_relation |
http://dx.doi.org/10.1080/15230430.2017.1414477 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2017.1414477 https://doaj.org/article/991d029e4e404876b2b229652770f6b9 |
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_ |
1766286928967106560 |