Arctic ice export events and their potential impact on global climate during the late Pleistocene
Ice sheets in the North American Arctic and, to a lesser extent, those in northern Eurasia calved large quantities of icebergs that drifted through Fram Strait into the Greenland Sea several times during the late Pleistocene. These icebergs deposited Fe oxide grains (45–250 mm) and coarse lithic cla...
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Language: | English |
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AGU (American Geophysical Union)
2002
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Online Access: | https://oceanrep.geomar.de/id/eprint/1317/ https://oceanrep.geomar.de/id/eprint/1317/1/palo931.pdf https://doi.org/10.1029/2001PA000639 |
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ftoceanrep:oai:oceanrep.geomar.de:1317 2024-09-30T14:28:01+00:00 Arctic ice export events and their potential impact on global climate during the late Pleistocene Darby, D. A. Bischof, J. F. Spielhagen, Robert Marshall, S. A. Herman, S. W. 2002 text https://oceanrep.geomar.de/id/eprint/1317/ https://oceanrep.geomar.de/id/eprint/1317/1/palo931.pdf https://doi.org/10.1029/2001PA000639 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/1317/1/palo931.pdf Darby, D. A., Bischof, J. F., Spielhagen, R., Marshall, S. A. and Herman, S. W. (2002) Arctic ice export events and their potential impact on global climate during the late Pleistocene. Open Access Paleoceanography, 17 (2). p. 1025. DOI 10.1029/2001PA000639 <https://doi.org/10.1029/2001PA000639>. doi:10.1029/2001PA000639 info:eu-repo/semantics/openAccess Article PeerReviewed 2002 ftoceanrep https://doi.org/10.1029/2001PA000639 2024-09-04T05:04:40Z Ice sheets in the North American Arctic and, to a lesser extent, those in northern Eurasia calved large quantities of icebergs that drifted through Fram Strait into the Greenland Sea several times during the late Pleistocene. These icebergs deposited Fe oxide grains (45–250 mm) and coarse lithic clasts >250 mm matched to specific circum-Arctic sources. Four massive Arctic iceberg export events are identified from the Laurentide and the Innuitian ice sheets, between 14 and 34 ka (calendar years) in a sediment core from Fram Strait. These relatively short duration (<1–4 kyr) events contain 3–5 times the background levels of Fe oxide grains. They began suddenly, as indicated by a steep rise in the number of grains matched to an ice sheet source, suggesting rapid purges of ice through Fram Strait, due perhaps to collapse of ice sheets. The larger events from the northwestern Laurentide ice sheet are preceded by events from the Innuitian ice sheet. Despite the chronological uncertainties, the Arctic export events appear to occur prior to Heinrich events. Article in Journal/Newspaper Arctic Arctic Fram Strait Greenland Greenland Sea Ice Sheet Iceberg* OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Greenland Paleoceanography 17 2 15-1 15-17 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Ice sheets in the North American Arctic and, to a lesser extent, those in northern Eurasia calved large quantities of icebergs that drifted through Fram Strait into the Greenland Sea several times during the late Pleistocene. These icebergs deposited Fe oxide grains (45–250 mm) and coarse lithic clasts >250 mm matched to specific circum-Arctic sources. Four massive Arctic iceberg export events are identified from the Laurentide and the Innuitian ice sheets, between 14 and 34 ka (calendar years) in a sediment core from Fram Strait. These relatively short duration (<1–4 kyr) events contain 3–5 times the background levels of Fe oxide grains. They began suddenly, as indicated by a steep rise in the number of grains matched to an ice sheet source, suggesting rapid purges of ice through Fram Strait, due perhaps to collapse of ice sheets. The larger events from the northwestern Laurentide ice sheet are preceded by events from the Innuitian ice sheet. Despite the chronological uncertainties, the Arctic export events appear to occur prior to Heinrich events. |
format |
Article in Journal/Newspaper |
author |
Darby, D. A. Bischof, J. F. Spielhagen, Robert Marshall, S. A. Herman, S. W. |
spellingShingle |
Darby, D. A. Bischof, J. F. Spielhagen, Robert Marshall, S. A. Herman, S. W. Arctic ice export events and their potential impact on global climate during the late Pleistocene |
author_facet |
Darby, D. A. Bischof, J. F. Spielhagen, Robert Marshall, S. A. Herman, S. W. |
author_sort |
Darby, D. A. |
title |
Arctic ice export events and their potential impact on global climate during the late Pleistocene |
title_short |
Arctic ice export events and their potential impact on global climate during the late Pleistocene |
title_full |
Arctic ice export events and their potential impact on global climate during the late Pleistocene |
title_fullStr |
Arctic ice export events and their potential impact on global climate during the late Pleistocene |
title_full_unstemmed |
Arctic ice export events and their potential impact on global climate during the late Pleistocene |
title_sort |
arctic ice export events and their potential impact on global climate during the late pleistocene |
publisher |
AGU (American Geophysical Union) |
publishDate |
2002 |
url |
https://oceanrep.geomar.de/id/eprint/1317/ https://oceanrep.geomar.de/id/eprint/1317/1/palo931.pdf https://doi.org/10.1029/2001PA000639 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic Fram Strait Greenland Greenland Sea Ice Sheet Iceberg* |
genre_facet |
Arctic Arctic Fram Strait Greenland Greenland Sea Ice Sheet Iceberg* |
op_relation |
https://oceanrep.geomar.de/id/eprint/1317/1/palo931.pdf Darby, D. A., Bischof, J. F., Spielhagen, R., Marshall, S. A. and Herman, S. W. (2002) Arctic ice export events and their potential impact on global climate during the late Pleistocene. Open Access Paleoceanography, 17 (2). p. 1025. DOI 10.1029/2001PA000639 <https://doi.org/10.1029/2001PA000639>. doi:10.1029/2001PA000639 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2001PA000639 |
container_title |
Paleoceanography |
container_volume |
17 |
container_issue |
2 |
container_start_page |
15-1 |
op_container_end_page |
15-17 |
_version_ |
1811633900311543808 |