Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial
Ongoing climate change focuses attention on the Arctic cryosphere’s responses to past and future climate states. Although it is now recognized the Arctic Ocean Basin was covered by ice sheets and their associated floating ice shelves several times during the Late Pleistocene, the timing and extent o...
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ftutahsudc:oai:digitalcommons.usu.edu:geology_facpub-1517 2023-05-15T14:34:18+02:00 Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial Farquharson, Louise Mann, Daniel Rittenour, Tammy M. Groves, Pamela Grosse, Guido Jones, Benjamin Geological Society of America 2018-08-02T07:00:00Z application/pdf https://digitalcommons.usu.edu/geology_facpub/518 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1517&context=geology_facpub unknown Hosted by Utah State University Libraries https://digitalcommons.usu.edu/geology_facpub/518 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1517&context=geology_facpub Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. http://creativecommons.org/licenses/by/4.0/ PDM CC-BY Geosciences Faculty Publications Alaska Arctic Coastal Plain Arctic Ocean Arctic Region Beaufort Sea Earth Sciences Geology Physical Sciences and Mathematics text 2018 ftutahsudc 2022-03-07T21:51:45Z Ongoing climate change focuses attention on the Arctic cryosphere’s responses to past and future climate states. Although it is now recognized the Arctic Ocean Basin was covered by ice sheets and their associated floating ice shelves several times during the Late Pleistocene, the timing and extent of these polar ice sheets remain uncertain. Here we relate a relict barrier-island system on the Beaufort Sea coast of northern Alaska to the isostatic effects of a previously unrecognized ice shelf grounded on the adjacent continental shelf. A new suite of optically stimulated luminescence dates show that this barrier system formed during one or more marine transgressions occurring late in Marine Isotope Stage 5 (MIS 5) between 113 ka and 71 ka. Because these transgressions occurred after the warmest part of the last interglacial (ca. 123 ka) and did not coincide with the global eustatic sea-level maximum during MIS 5e, this indicates Arctic ice sheets developed out-of-phase with lower-latitude sectors of the Laurentide and Fennoscandian ice sheets. We speculate that Arctic ice sheets began development during full interglacial conditions when abundant moisture penetrated to high latitudes, and low summer insolation favored glacier growth. These ice sheets reached their full extents at interglacial-glacial transitions, then wasted away at the heights of mid-latitude glaciations because of moisture limitations. Text Arctic Arctic Ocean Beaufort Sea Climate change Fennoscandian glacier Ice Shelf Ice Shelves Alaska Utah State University: DigitalCommons@USU Arctic Arctic Ocean Barrier Island ENVELOPE(78.396,78.396,-68.431,-68.431) |
institution |
Open Polar |
collection |
Utah State University: DigitalCommons@USU |
op_collection_id |
ftutahsudc |
language |
unknown |
topic |
Alaska Arctic Coastal Plain Arctic Ocean Arctic Region Beaufort Sea Earth Sciences Geology Physical Sciences and Mathematics |
spellingShingle |
Alaska Arctic Coastal Plain Arctic Ocean Arctic Region Beaufort Sea Earth Sciences Geology Physical Sciences and Mathematics Farquharson, Louise Mann, Daniel Rittenour, Tammy M. Groves, Pamela Grosse, Guido Jones, Benjamin Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial |
topic_facet |
Alaska Arctic Coastal Plain Arctic Ocean Arctic Region Beaufort Sea Earth Sciences Geology Physical Sciences and Mathematics |
description |
Ongoing climate change focuses attention on the Arctic cryosphere’s responses to past and future climate states. Although it is now recognized the Arctic Ocean Basin was covered by ice sheets and their associated floating ice shelves several times during the Late Pleistocene, the timing and extent of these polar ice sheets remain uncertain. Here we relate a relict barrier-island system on the Beaufort Sea coast of northern Alaska to the isostatic effects of a previously unrecognized ice shelf grounded on the adjacent continental shelf. A new suite of optically stimulated luminescence dates show that this barrier system formed during one or more marine transgressions occurring late in Marine Isotope Stage 5 (MIS 5) between 113 ka and 71 ka. Because these transgressions occurred after the warmest part of the last interglacial (ca. 123 ka) and did not coincide with the global eustatic sea-level maximum during MIS 5e, this indicates Arctic ice sheets developed out-of-phase with lower-latitude sectors of the Laurentide and Fennoscandian ice sheets. We speculate that Arctic ice sheets began development during full interglacial conditions when abundant moisture penetrated to high latitudes, and low summer insolation favored glacier growth. These ice sheets reached their full extents at interglacial-glacial transitions, then wasted away at the heights of mid-latitude glaciations because of moisture limitations. |
author2 |
Geological Society of America |
format |
Text |
author |
Farquharson, Louise Mann, Daniel Rittenour, Tammy M. Groves, Pamela Grosse, Guido Jones, Benjamin |
author_facet |
Farquharson, Louise Mann, Daniel Rittenour, Tammy M. Groves, Pamela Grosse, Guido Jones, Benjamin |
author_sort |
Farquharson, Louise |
title |
Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial |
title_short |
Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial |
title_full |
Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial |
title_fullStr |
Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial |
title_full_unstemmed |
Alaskan Marine Transgressions Record Out-of-Phase Arctic Ocean Glaciation During the Last Interglacial |
title_sort |
alaskan marine transgressions record out-of-phase arctic ocean glaciation during the last interglacial |
publisher |
Hosted by Utah State University Libraries |
publishDate |
2018 |
url |
https://digitalcommons.usu.edu/geology_facpub/518 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1517&context=geology_facpub |
long_lat |
ENVELOPE(78.396,78.396,-68.431,-68.431) |
geographic |
Arctic Arctic Ocean Barrier Island |
geographic_facet |
Arctic Arctic Ocean Barrier Island |
genre |
Arctic Arctic Ocean Beaufort Sea Climate change Fennoscandian glacier Ice Shelf Ice Shelves Alaska |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Climate change Fennoscandian glacier Ice Shelf Ice Shelves Alaska |
op_source |
Geosciences Faculty Publications |
op_relation |
https://digitalcommons.usu.edu/geology_facpub/518 https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1517&context=geology_facpub |
op_rights |
Copyright for this work is held by the author. Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user. For more information contact the Institutional Repository Librarian at digitalcommons@usu.edu. http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
PDM CC-BY |
_version_ |
1766307377005461504 |