Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events
We present the first high-resolution record of iceberg calving on the continental slope of Vancouver Island, British Columbia (MD02-2496, 48 degrees 58N, 127 degrees 02W, 1243 m water depth), through the last glacial from the Cordilleran Ice Sheet (CIS). These previously unknown ice-rafted debris (I...
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Amer Geophysical Union
2008
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Online Access: | https://doi.org/10.1029/2008PA001606 https://archimer.ifremer.fr/doc/00237/34841/33269.pdf https://archimer.ifremer.fr/doc/00237/34841/ |
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fttriple:oai:gotriple.eu:10670/1.9n04jd 2023-05-15T16:40:25+02:00 Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events Hendy, I. L. Cosma, T. 2008-01-01 https://doi.org/10.1029/2008PA001606 https://archimer.ifremer.fr/doc/00237/34841/33269.pdf https://archimer.ifremer.fr/doc/00237/34841/ en eng Amer Geophysical Union doi:10.1029/2008PA001606 10670/1.9n04jd https://archimer.ifremer.fr/doc/00237/34841/33269.pdf https://archimer.ifremer.fr/doc/00237/34841/ other Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2008-05 , Vol. 23 , N. 2 / PA2101 , P. 1-8 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ 2008 fttriple https://doi.org/10.1029/2008PA001606 2023-01-22T18:37:40Z We present the first high-resolution record of iceberg calving on the continental slope of Vancouver Island, British Columbia (MD02-2496, 48 degrees 58N, 127 degrees 02W, 1243 m water depth), through the last glacial from the Cordilleran Ice Sheet (CIS). These previously unknown ice-rafted debris (IRD) events representing significant retreat of the western margin of the CIS out of marine waters show little correspondence with local climate change. High-resolution radiocarbon dating indicates that the younger IRD events coincide with global radiocarbon age plateaus that allow direct correlation with distal climate records where the same plateaus have been identified. The coincidence of episodic shedding of IRD from the CIS with North Atlantic climate events (i. e., North Atlantic Deep Water shutdown, and Heinrich events) begs the question: What drove CIS destabilization? Forcing appears to be external to CIS dynamics perhaps resulting from either eustatic sea level rise or episodes of atmospheric warming over the North American continent. Text Ice Sheet North Atlantic Deep Water North Atlantic Unknown Paleoceanography 23 2 n/a n/a |
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geo envir Hendy, I. L. Cosma, T. Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events |
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geo envir |
description |
We present the first high-resolution record of iceberg calving on the continental slope of Vancouver Island, British Columbia (MD02-2496, 48 degrees 58N, 127 degrees 02W, 1243 m water depth), through the last glacial from the Cordilleran Ice Sheet (CIS). These previously unknown ice-rafted debris (IRD) events representing significant retreat of the western margin of the CIS out of marine waters show little correspondence with local climate change. High-resolution radiocarbon dating indicates that the younger IRD events coincide with global radiocarbon age plateaus that allow direct correlation with distal climate records where the same plateaus have been identified. The coincidence of episodic shedding of IRD from the CIS with North Atlantic climate events (i. e., North Atlantic Deep Water shutdown, and Heinrich events) begs the question: What drove CIS destabilization? Forcing appears to be external to CIS dynamics perhaps resulting from either eustatic sea level rise or episodes of atmospheric warming over the North American continent. |
format |
Text |
author |
Hendy, I. L. Cosma, T. |
author_facet |
Hendy, I. L. Cosma, T. |
author_sort |
Hendy, I. L. |
title |
Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events |
title_short |
Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events |
title_full |
Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events |
title_fullStr |
Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events |
title_full_unstemmed |
Vulnerability of the Cordilleran Ice Sheet to iceberg calving during late quaternary rapid climate change events |
title_sort |
vulnerability of the cordilleran ice sheet to iceberg calving during late quaternary rapid climate change events |
publisher |
Amer Geophysical Union |
publishDate |
2008 |
url |
https://doi.org/10.1029/2008PA001606 https://archimer.ifremer.fr/doc/00237/34841/33269.pdf https://archimer.ifremer.fr/doc/00237/34841/ |
genre |
Ice Sheet North Atlantic Deep Water North Atlantic |
genre_facet |
Ice Sheet North Atlantic Deep Water North Atlantic |
op_source |
Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2008-05 , Vol. 23 , N. 2 / PA2101 , P. 1-8 |
op_relation |
doi:10.1029/2008PA001606 10670/1.9n04jd https://archimer.ifremer.fr/doc/00237/34841/33269.pdf https://archimer.ifremer.fr/doc/00237/34841/ |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2008PA001606 |
container_title |
Paleoceanography |
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23 |
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2 |
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1766030810545127424 |