A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate
An important indicator of Holocene climate change is provided by evidence for variations in the extent of drift ice. A proxy for drift ice in Iceland waters is provided by the presence of quartz. Quantitative x-ray diffraction analysis of the < 2 mm sediment fraction was undertaken on 16 cores fr...
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crsagepubl:10.1177/0959683608098953 2024-05-19T07:35:46+00:00 A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate Andrews, John T. Darby, Dennis Eberle, Dennis Jennings, Anne E. Moros, Matthias Ogilvie, Astrid 2009 http://dx.doi.org/10.1177/0959683608098953 http://journals.sagepub.com/doi/pdf/10.1177/0959683608098953 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 19, issue 1, page 71-77 ISSN 0959-6836 1477-0911 journal-article 2009 crsagepubl https://doi.org/10.1177/0959683608098953 2024-04-25T08:13:27Z An important indicator of Holocene climate change is provided by evidence for variations in the extent of drift ice. A proxy for drift ice in Iceland waters is provided by the presence of quartz. Quantitative x-ray diffraction analysis of the < 2 mm sediment fraction was undertaken on 16 cores from around Iceland. The quartz weight (wt.)% estimates from each core were integrated into 250-yr intervals between −0.05 and 11.7 cal. ka BP. Median quartz wt.% varied between 0.2 and 3.4 and maximum values ranged between 2.8 and 11.8 wt.%. High values were attained in the early Holocene and minimum values were reached 6—7 cal. ka BP. Quartz wt.% then rose steadily during the late Holocene. Our data exhibit no correlation with counts on haematite-stained quartz (HSQ) grains from VM129-191 west of Ireland casting doubt on the ice-transport origin. A pilot study on the provenance of Fe oxide grains in two cores that cover the last 1.3 and 6.1 cal. ka BP indicated a large fraction of the grains between 1 and 6 cal. ka BP were from either Icelandic or presently unsampled sources. However, there was a dramatic increase in Canadian and Russian sources from the Arctic Ocean ~1 cal. ka BP. These data may indicate the beginning of an Arctic Oscillation-like climate mode. Article in Journal/Newspaper Arctic Arctic Ocean Climate change Iceland North Atlantic SAGE Publications The Holocene 19 1 71 77 |
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English |
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An important indicator of Holocene climate change is provided by evidence for variations in the extent of drift ice. A proxy for drift ice in Iceland waters is provided by the presence of quartz. Quantitative x-ray diffraction analysis of the < 2 mm sediment fraction was undertaken on 16 cores from around Iceland. The quartz weight (wt.)% estimates from each core were integrated into 250-yr intervals between −0.05 and 11.7 cal. ka BP. Median quartz wt.% varied between 0.2 and 3.4 and maximum values ranged between 2.8 and 11.8 wt.%. High values were attained in the early Holocene and minimum values were reached 6—7 cal. ka BP. Quartz wt.% then rose steadily during the late Holocene. Our data exhibit no correlation with counts on haematite-stained quartz (HSQ) grains from VM129-191 west of Ireland casting doubt on the ice-transport origin. A pilot study on the provenance of Fe oxide grains in two cores that cover the last 1.3 and 6.1 cal. ka BP indicated a large fraction of the grains between 1 and 6 cal. ka BP were from either Icelandic or presently unsampled sources. However, there was a dramatic increase in Canadian and Russian sources from the Arctic Ocean ~1 cal. ka BP. These data may indicate the beginning of an Arctic Oscillation-like climate mode. |
format |
Article in Journal/Newspaper |
author |
Andrews, John T. Darby, Dennis Eberle, Dennis Jennings, Anne E. Moros, Matthias Ogilvie, Astrid |
spellingShingle |
Andrews, John T. Darby, Dennis Eberle, Dennis Jennings, Anne E. Moros, Matthias Ogilvie, Astrid A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate |
author_facet |
Andrews, John T. Darby, Dennis Eberle, Dennis Jennings, Anne E. Moros, Matthias Ogilvie, Astrid |
author_sort |
Andrews, John T. |
title |
A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate |
title_short |
A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate |
title_full |
A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate |
title_fullStr |
A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate |
title_full_unstemmed |
A robust, multisite Holocene history of drift ice off northern Iceland: implications for North Atlantic climate |
title_sort |
robust, multisite holocene history of drift ice off northern iceland: implications for north atlantic climate |
publisher |
SAGE Publications |
publishDate |
2009 |
url |
http://dx.doi.org/10.1177/0959683608098953 http://journals.sagepub.com/doi/pdf/10.1177/0959683608098953 |
genre |
Arctic Arctic Ocean Climate change Iceland North Atlantic |
genre_facet |
Arctic Arctic Ocean Climate change Iceland North Atlantic |
op_source |
The Holocene volume 19, issue 1, page 71-77 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1177/0959683608098953 |
container_title |
The Holocene |
container_volume |
19 |
container_issue |
1 |
container_start_page |
71 |
op_container_end_page |
77 |
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1799474789964840960 |