Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments
To compare north and south polar marine paleoenvironments over the last 30,000 years, comparable chronological (radiocarbon) records must be developed and refined. Many areas in the polar regions do not preserve marine carbonates (foraminifera, mollusks), and thus age determinations, of necessity, a...
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Norwegian Polar Institute
1998
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Online Access: | https://polarresearch.net/index.php/polar/article/view/2275 https://doi.org/10.3402/polar.v17i2.6619 |
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ftjpolarres:oai:journals.openacademia.net:article/2275 2023-05-15T14:01:21+02:00 Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments Licht, Kathy J. Cunningham, Wendy L. Andrews, John T. Domack, Eugene W. Jennings, Anne E. 1998-01-12 application/pdf https://polarresearch.net/index.php/polar/article/view/2275 https://doi.org/10.3402/polar.v17i2.6619 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2275/5526 https://polarresearch.net/index.php/polar/article/view/2275 doi:10.3402/polar.v17i2.6619 Copyright (c) 2018 Polar Research Polar Research; Vol. 17 No. 2 (1998); 203-216 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1998 ftjpolarres https://doi.org/10.3402/polar.v17i2.6619 2021-11-11T19:12:21Z To compare north and south polar marine paleoenvironments over the last 30,000 years, comparable chronological (radiocarbon) records must be developed and refined. Many areas in the polar regions do not preserve marine carbonates (foraminifera, mollusks), and thus age determinations, of necessity, are based on the acid-insoluble organic (AIO) fraction of the sediment. Although AIO ages are problematic and rarely used in the Arctic, they provide reasonable and consistent chronologies for the Ross Sea, Antarctica. AIO dates are meaningful in the Ross Sea because there are relatively high levels of productivity, good preservation of marine biogenic material in the sediment, and little input of terrigenous sediment and old/dead carbon. Event stratigraphy based upon proxy records of biogenic silica and ?13C can be used to assess the reliability of the AIO dates and surface age corrections. Reconstructed time-series of changes in the biogenic silica content of cores from the western Ross Sea show apparent similarities with the ‘classic’deglacial climate sequence of the northern North Atlantic. Once the absolute ages of the antarctic AIO dates are constrained by independently dated records to validate surface age corrections, it will be possible to directly compare the timing of events such as ice-rafting events in the sedimentary record. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Foraminifera* North Atlantic Polar Research Ross Sea Polar Research (E-Journal) Arctic Antarctic The Antarctic Ross Sea Polar Research 17 2 203 216 |
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Open Polar |
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Polar Research (E-Journal) |
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ftjpolarres |
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English |
description |
To compare north and south polar marine paleoenvironments over the last 30,000 years, comparable chronological (radiocarbon) records must be developed and refined. Many areas in the polar regions do not preserve marine carbonates (foraminifera, mollusks), and thus age determinations, of necessity, are based on the acid-insoluble organic (AIO) fraction of the sediment. Although AIO ages are problematic and rarely used in the Arctic, they provide reasonable and consistent chronologies for the Ross Sea, Antarctica. AIO dates are meaningful in the Ross Sea because there are relatively high levels of productivity, good preservation of marine biogenic material in the sediment, and little input of terrigenous sediment and old/dead carbon. Event stratigraphy based upon proxy records of biogenic silica and ?13C can be used to assess the reliability of the AIO dates and surface age corrections. Reconstructed time-series of changes in the biogenic silica content of cores from the western Ross Sea show apparent similarities with the ‘classic’deglacial climate sequence of the northern North Atlantic. Once the absolute ages of the antarctic AIO dates are constrained by independently dated records to validate surface age corrections, it will be possible to directly compare the timing of events such as ice-rafting events in the sedimentary record. |
format |
Article in Journal/Newspaper |
author |
Licht, Kathy J. Cunningham, Wendy L. Andrews, John T. Domack, Eugene W. Jennings, Anne E. |
spellingShingle |
Licht, Kathy J. Cunningham, Wendy L. Andrews, John T. Domack, Eugene W. Jennings, Anne E. Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments |
author_facet |
Licht, Kathy J. Cunningham, Wendy L. Andrews, John T. Domack, Eugene W. Jennings, Anne E. |
author_sort |
Licht, Kathy J. |
title |
Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments |
title_short |
Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments |
title_full |
Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments |
title_fullStr |
Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments |
title_full_unstemmed |
Establishing chronologies from acid-insoluble organic 14C dates on Antarctic (Ross Sea) and Arctic (North Atlantic) marine sediments |
title_sort |
establishing chronologies from acid-insoluble organic 14c dates on antarctic (ross sea) and arctic (north atlantic) marine sediments |
publisher |
Norwegian Polar Institute |
publishDate |
1998 |
url |
https://polarresearch.net/index.php/polar/article/view/2275 https://doi.org/10.3402/polar.v17i2.6619 |
geographic |
Arctic Antarctic The Antarctic Ross Sea |
geographic_facet |
Arctic Antarctic The Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctica Arctic Foraminifera* North Atlantic Polar Research Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Arctic Foraminifera* North Atlantic Polar Research Ross Sea |
op_source |
Polar Research; Vol. 17 No. 2 (1998); 203-216 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2275/5526 https://polarresearch.net/index.php/polar/article/view/2275 doi:10.3402/polar.v17i2.6619 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v17i2.6619 |
container_title |
Polar Research |
container_volume |
17 |
container_issue |
2 |
container_start_page |
203 |
op_container_end_page |
216 |
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1766271081720578048 |