Arctic Perennial Ice Cover Over the Last 14 Million Years
Knowledge of the long-term history of the perennial ice is an important issue that has eluded study because the Cenozoic core material needed has been unavailable until the recent Arctic Coring Expedition (ACEX). Detrital Fe oxide mineral grains analyzed by microprobe from the last 14 Ma (164 m) of...
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ODU Digital Commons
2008
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1289 2023-12-03T10:16:36+01:00 Arctic Perennial Ice Cover Over the Last 14 Million Years Darby, Dennis A. 2008-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/278 https://doi.org/10.1029/2007pa001479 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1289/viewcontent/Darby_2008_Arctic_perennial_ice_cover_over_the.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/278 doi:10.1029/2007pa001479 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1289/viewcontent/Darby_2008_Arctic_perennial_ice_cover_over_the.pdf Web of Science: "Free full text from publisher -- gold open access." OES Faculty Publications Summer sea ice Sediment transport Circulation Dynamics Late Pleistocene Geochemistry Oceanography Paleontology article 2008 ftolddominionuni https://doi.org/10.1029/2007pa001479 2023-11-06T19:09:42Z Knowledge of the long-term history of the perennial ice is an important issue that has eluded study because the Cenozoic core material needed has been unavailable until the recent Arctic Coring Expedition (ACEX). Detrital Fe oxide mineral grains analyzed by microprobe from the last 14 Ma (164 m) of the ACEX composite core on the Lomonosov Ridge were matched to circum-Arctic sources with the same mineral and 12-element composition. These precise source determinations and estimates of drift rates were used to determine that these sand grains could not be rafted to the ACEX core site in less than a year. Thus the perennial ice cover has existed since 14 Ma except for the unlikely rapid return to seasonal ice between the average sampling interval of about 0.17 Ma. Both North America and Russia contributed significant Fe grains to the ACEX core during the last 14 Ma. Article in Journal/Newspaper Arctic Lomonosov Ridge Sea ice Old Dominion University: ODU Digital Commons Arctic Paleoceanography 23 1 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Summer sea ice Sediment transport Circulation Dynamics Late Pleistocene Geochemistry Oceanography Paleontology |
spellingShingle |
Summer sea ice Sediment transport Circulation Dynamics Late Pleistocene Geochemistry Oceanography Paleontology Darby, Dennis A. Arctic Perennial Ice Cover Over the Last 14 Million Years |
topic_facet |
Summer sea ice Sediment transport Circulation Dynamics Late Pleistocene Geochemistry Oceanography Paleontology |
description |
Knowledge of the long-term history of the perennial ice is an important issue that has eluded study because the Cenozoic core material needed has been unavailable until the recent Arctic Coring Expedition (ACEX). Detrital Fe oxide mineral grains analyzed by microprobe from the last 14 Ma (164 m) of the ACEX composite core on the Lomonosov Ridge were matched to circum-Arctic sources with the same mineral and 12-element composition. These precise source determinations and estimates of drift rates were used to determine that these sand grains could not be rafted to the ACEX core site in less than a year. Thus the perennial ice cover has existed since 14 Ma except for the unlikely rapid return to seasonal ice between the average sampling interval of about 0.17 Ma. Both North America and Russia contributed significant Fe grains to the ACEX core during the last 14 Ma. |
format |
Article in Journal/Newspaper |
author |
Darby, Dennis A. |
author_facet |
Darby, Dennis A. |
author_sort |
Darby, Dennis A. |
title |
Arctic Perennial Ice Cover Over the Last 14 Million Years |
title_short |
Arctic Perennial Ice Cover Over the Last 14 Million Years |
title_full |
Arctic Perennial Ice Cover Over the Last 14 Million Years |
title_fullStr |
Arctic Perennial Ice Cover Over the Last 14 Million Years |
title_full_unstemmed |
Arctic Perennial Ice Cover Over the Last 14 Million Years |
title_sort |
arctic perennial ice cover over the last 14 million years |
publisher |
ODU Digital Commons |
publishDate |
2008 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/278 https://doi.org/10.1029/2007pa001479 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1289/viewcontent/Darby_2008_Arctic_perennial_ice_cover_over_the.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Lomonosov Ridge Sea ice |
genre_facet |
Arctic Lomonosov Ridge Sea ice |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/278 doi:10.1029/2007pa001479 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1289/viewcontent/Darby_2008_Arctic_perennial_ice_cover_over_the.pdf |
op_rights |
Web of Science: "Free full text from publisher -- gold open access." |
op_doi |
https://doi.org/10.1029/2007pa001479 |
container_title |
Paleoceanography |
container_volume |
23 |
container_issue |
1 |
_version_ |
1784263540087980032 |