Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland
A Holocene sediment record is presented from the Djupall trough, situated on the inner shelf northwest of Iceland. The paleoclimatic development has been interpreted on the basis of mass accumulation rate, carbonate content, mean grain size, sediment petrology and 29 radiocarbon dates. The results d...
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Language: | English |
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Online Access: | https://lup.lub.lu.se/record/253503 https://doi.org/10.1016/j.margeo.2004.11.010 |
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ftulundlup:oai:lup.lub.lu.se:79e65737-8a59-419b-bbf2-989782c85727 2023-05-15T15:45:00+02:00 Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland Andresen, Camilla Snowman Bond, G Kuijpers, A Knutz, PC Björck, Svante 2005 https://lup.lub.lu.se/record/253503 https://doi.org/10.1016/j.margeo.2004.11.010 eng eng Elsevier https://lup.lub.lu.se/record/253503 http://dx.doi.org/10.1016/j.margeo.2004.11.010 wos:000227030000003 scopus:12544253265 Marine Geology; 214(4), pp 323-338 (2005) ISSN: 0025-3227 Geology Iceland Holocene storm activity basalt/plagioclase ratios carbonate production contributiontojournal/article info:eu-repo/semantics/article text 2005 ftulundlup https://doi.org/10.1016/j.margeo.2004.11.010 2023-02-01T23:27:24Z A Holocene sediment record is presented from the Djupall trough, situated on the inner shelf northwest of Iceland. The paleoclimatic development has been interpreted on the basis of mass accumulation rate, carbonate content, mean grain size, sediment petrology and 29 radiocarbon dates. The results demonstrate in the early Holocene (10,000-8000 cal year BP) high sediment accumulation rates attributable to the effect of enhanced sediment mobilisation under influence of a relatively low sea level and remobilisation of glacial sediments on the sparsely vegetated Vestfirdir peninsula. The data suggest that a general southward displacement of the Polar Front commenced around 5000-4000 cal year BP. A new proxy for Holocene climatic variability is presented by the basalt/plagioclase ratio in the 63-100 mum fraction. High basalt/plagioclase values are primarily related to periods of increased storminess and bottom current energy, which enhanced the transport of basaltic sediment from the coastal zone towards the outer shelf. Advection of polar waters containing basalt-rich IRD from the eastern Greenland Blosseville Kyst basalt province may also have contributed to increased basalt/plagioclase ratios. The correlation between basalt/plagioclase ratios and proxies of solar activity (C-14 production and Be-10 flux) was explored and suggests that some of the centennial-scale peaks in colder climate could be related to increased nuclide production in the upper atmosphere. In addition, it was found that the Medieval Warm Period (c. 1100-700 cal year BP) was characterised by strong cyclone activity over the Iceland region. Intense atmospheric circulation during this period has been confirmed also by other studies in the northern North Atlantic region. Article in Journal/Newspaper Blosseville kyst Greenland Iceland North Atlantic Lund University Publications (LUP) Greenland Blosseville Kyst ENVELOPE(-26.417,-26.417,68.750,68.750) Marine Geology 214 4 323 338 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology Iceland Holocene storm activity basalt/plagioclase ratios carbonate production |
spellingShingle |
Geology Iceland Holocene storm activity basalt/plagioclase ratios carbonate production Andresen, Camilla Snowman Bond, G Kuijpers, A Knutz, PC Björck, Svante Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland |
topic_facet |
Geology Iceland Holocene storm activity basalt/plagioclase ratios carbonate production |
description |
A Holocene sediment record is presented from the Djupall trough, situated on the inner shelf northwest of Iceland. The paleoclimatic development has been interpreted on the basis of mass accumulation rate, carbonate content, mean grain size, sediment petrology and 29 radiocarbon dates. The results demonstrate in the early Holocene (10,000-8000 cal year BP) high sediment accumulation rates attributable to the effect of enhanced sediment mobilisation under influence of a relatively low sea level and remobilisation of glacial sediments on the sparsely vegetated Vestfirdir peninsula. The data suggest that a general southward displacement of the Polar Front commenced around 5000-4000 cal year BP. A new proxy for Holocene climatic variability is presented by the basalt/plagioclase ratio in the 63-100 mum fraction. High basalt/plagioclase values are primarily related to periods of increased storminess and bottom current energy, which enhanced the transport of basaltic sediment from the coastal zone towards the outer shelf. Advection of polar waters containing basalt-rich IRD from the eastern Greenland Blosseville Kyst basalt province may also have contributed to increased basalt/plagioclase ratios. The correlation between basalt/plagioclase ratios and proxies of solar activity (C-14 production and Be-10 flux) was explored and suggests that some of the centennial-scale peaks in colder climate could be related to increased nuclide production in the upper atmosphere. In addition, it was found that the Medieval Warm Period (c. 1100-700 cal year BP) was characterised by strong cyclone activity over the Iceland region. Intense atmospheric circulation during this period has been confirmed also by other studies in the northern North Atlantic region. |
format |
Article in Journal/Newspaper |
author |
Andresen, Camilla Snowman Bond, G Kuijpers, A Knutz, PC Björck, Svante |
author_facet |
Andresen, Camilla Snowman Bond, G Kuijpers, A Knutz, PC Björck, Svante |
author_sort |
Andresen, Camilla Snowman |
title |
Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland |
title_short |
Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland |
title_full |
Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland |
title_fullStr |
Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland |
title_full_unstemmed |
Holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core NW off Iceland |
title_sort |
holocene climate variability at multidecadal time scales detected by sedimentological indicators in a shelf core nw off iceland |
publisher |
Elsevier |
publishDate |
2005 |
url |
https://lup.lub.lu.se/record/253503 https://doi.org/10.1016/j.margeo.2004.11.010 |
long_lat |
ENVELOPE(-26.417,-26.417,68.750,68.750) |
geographic |
Greenland Blosseville Kyst |
geographic_facet |
Greenland Blosseville Kyst |
genre |
Blosseville kyst Greenland Iceland North Atlantic |
genre_facet |
Blosseville kyst Greenland Iceland North Atlantic |
op_source |
Marine Geology; 214(4), pp 323-338 (2005) ISSN: 0025-3227 |
op_relation |
https://lup.lub.lu.se/record/253503 http://dx.doi.org/10.1016/j.margeo.2004.11.010 wos:000227030000003 scopus:12544253265 |
op_doi |
https://doi.org/10.1016/j.margeo.2004.11.010 |
container_title |
Marine Geology |
container_volume |
214 |
container_issue |
4 |
container_start_page |
323 |
op_container_end_page |
338 |
_version_ |
1766379370390224896 |