The last deglaciation of Alaska
We review available chronologies that constrain the timing of glacier fluctuations during the last deglaciation in Alaska. We address three questions relating to the last glacial termination: (i) How did the timing of glacier recession relate to buildup of global CO2, such as during the onset of CO2...
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Universidad de La Rioja
2017
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Online Access: | https://doi.org/10.18172/cig.3229 https://doaj.org/article/7d9f157e0e8b4fa2bd91de1c7edf354a |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:7d9f157e0e8b4fa2bd91de1c7edf354a 2023-05-15T15:44:15+02:00 The last deglaciation of Alaska J.P. Briner J.P. Tulenko D.S. kaufman N.E. Young J.F. Baichtal A. Lesnek 2017-09-01 https://doi.org/10.18172/cig.3229 https://doaj.org/article/7d9f157e0e8b4fa2bd91de1c7edf354a en es eng spa Universidad de La Rioja 0211-6820 1697-9540 doi:10.18172/cig.3229 https://doaj.org/article/7d9f157e0e8b4fa2bd91de1c7edf354a undefined Cuadernos de Investigación Geográfica, Vol 43, Iss 2, Pp 429-448 (2017) alaska deglaciation glacier geochronology paleoclimate geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.18172/cig.3229 2023-01-22T19:12:06Z We review available chronologies that constrain the timing of glacier fluctuations during the last deglaciation in Alaska. We address three questions relating to the last glacial termination: (i) How did the timing of glacier recession relate to buildup of global CO2, such as during the onset of CO2 rise at ~18 ka? (ii) Did glaciers fluctuate in synchrony with Heinrich Stadial 1 (18-14.6 ka)? And, (iii) what is the spatio-temporal pattern of glacier change during the climatically turbulent late glacial interval (14.6-11.7 ka)? The existing record is incomplete, yet reveals that most Alaskan glaciers experienced significant retreat (~40% of their Last Glacial Maximum lengths) prior to the onset of CO2 rise ~18 ka. This points to stronger insolation forcing of Alaskan glaciers compared to mid-latitude glaciers. Despite some glacier re-advances and standstills during Heinrich Stadial 1, most glaciers continued to recede. This suggests that glaciers in Alaska were relatively immune to the far-field effects of Atlantic meridional overturning circulation. Finally, the majority of glaciers (9 out of 14 available records) were up-valley of their late Holocene glacier extents during the Younger Dryas. Most of the sites with evidence for relatively extensive glaciers during the Younger Dryas are in southern Alaska, which may relate to moisture changes associated with the flooding of Bering Strait as much as it does to changes in North Atlantic Ocean circulation. Article in Journal/Newspaper Bering Strait glacier glaciers North Atlantic Alaska Unknown Bering Strait Cuadernos de Investigación Geográfica 43 2 429 448 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English Spanish |
topic |
alaska deglaciation glacier geochronology paleoclimate geo envir |
spellingShingle |
alaska deglaciation glacier geochronology paleoclimate geo envir J.P. Briner J.P. Tulenko D.S. kaufman N.E. Young J.F. Baichtal A. Lesnek The last deglaciation of Alaska |
topic_facet |
alaska deglaciation glacier geochronology paleoclimate geo envir |
description |
We review available chronologies that constrain the timing of glacier fluctuations during the last deglaciation in Alaska. We address three questions relating to the last glacial termination: (i) How did the timing of glacier recession relate to buildup of global CO2, such as during the onset of CO2 rise at ~18 ka? (ii) Did glaciers fluctuate in synchrony with Heinrich Stadial 1 (18-14.6 ka)? And, (iii) what is the spatio-temporal pattern of glacier change during the climatically turbulent late glacial interval (14.6-11.7 ka)? The existing record is incomplete, yet reveals that most Alaskan glaciers experienced significant retreat (~40% of their Last Glacial Maximum lengths) prior to the onset of CO2 rise ~18 ka. This points to stronger insolation forcing of Alaskan glaciers compared to mid-latitude glaciers. Despite some glacier re-advances and standstills during Heinrich Stadial 1, most glaciers continued to recede. This suggests that glaciers in Alaska were relatively immune to the far-field effects of Atlantic meridional overturning circulation. Finally, the majority of glaciers (9 out of 14 available records) were up-valley of their late Holocene glacier extents during the Younger Dryas. Most of the sites with evidence for relatively extensive glaciers during the Younger Dryas are in southern Alaska, which may relate to moisture changes associated with the flooding of Bering Strait as much as it does to changes in North Atlantic Ocean circulation. |
format |
Article in Journal/Newspaper |
author |
J.P. Briner J.P. Tulenko D.S. kaufman N.E. Young J.F. Baichtal A. Lesnek |
author_facet |
J.P. Briner J.P. Tulenko D.S. kaufman N.E. Young J.F. Baichtal A. Lesnek |
author_sort |
J.P. Briner |
title |
The last deglaciation of Alaska |
title_short |
The last deglaciation of Alaska |
title_full |
The last deglaciation of Alaska |
title_fullStr |
The last deglaciation of Alaska |
title_full_unstemmed |
The last deglaciation of Alaska |
title_sort |
last deglaciation of alaska |
publisher |
Universidad de La Rioja |
publishDate |
2017 |
url |
https://doi.org/10.18172/cig.3229 https://doaj.org/article/7d9f157e0e8b4fa2bd91de1c7edf354a |
geographic |
Bering Strait |
geographic_facet |
Bering Strait |
genre |
Bering Strait glacier glaciers North Atlantic Alaska |
genre_facet |
Bering Strait glacier glaciers North Atlantic Alaska |
op_source |
Cuadernos de Investigación Geográfica, Vol 43, Iss 2, Pp 429-448 (2017) |
op_relation |
0211-6820 1697-9540 doi:10.18172/cig.3229 https://doaj.org/article/7d9f157e0e8b4fa2bd91de1c7edf354a |
op_rights |
undefined |
op_doi |
https://doi.org/10.18172/cig.3229 |
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Cuadernos de Investigación Geográfica |
container_volume |
43 |
container_issue |
2 |
container_start_page |
429 |
op_container_end_page |
448 |
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1766378549346828288 |