Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence
Abstract Holocene changes in the benthic and planktic foraminiferal fauna (>63 µm) from a marine sediment core (ARC‐3 Canadian Arctic Archipelago, 74° 16.050′ N, 91° 06.380′ W, water depth 347 m) show that significant environmental and palaeoceanographic variations occurred during the last 10 ka....
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crwiley:10.1002/jqs.1367 2024-06-02T07:59:57+00:00 Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence Gregory, Thomas R. Smart, Christopher W. Hart, Malcolm B. Massé, Guillaume Vare, Lindsay L. Belt, Simon T. Natural Environment Research Council (NERC), UK 2010 http://dx.doi.org/10.1002/jqs.1367 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1367 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1367 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 25, issue 6, page 903-910 ISSN 0267-8179 1099-1417 journal-article 2010 crwiley https://doi.org/10.1002/jqs.1367 2024-05-03T11:23:02Z Abstract Holocene changes in the benthic and planktic foraminiferal fauna (>63 µm) from a marine sediment core (ARC‐3 Canadian Arctic Archipelago, 74° 16.050′ N, 91° 06.380′ W, water depth 347 m) show that significant environmental and palaeoceanographic variations occurred during the last 10 ka. Foraminiferal assemblages are restricted to the ca. 4.5–10 ka interval as younger samples are mostly barren of foraminifera due to intense carbonate dissolution after ca. 4.5 ka. Foraminiferal assemblages in the ca. 4.5–10 ka interval are dominated by the benthic species Islandiella helenae and Cassidulina reniforme (57% of total), with Elphidium clavatum , Cibicides lobatulus and Buccella frigida also being common in this interval. The dominance of these species indicates a seasonal sea ice regime which is consistent with the occurrence of the sea ice diatom‐derived organic geochemical biomarker IP 25 throughout the core. The abundances of C. reniforme and E. clavatum decline upcore; consistent with more frequent mixing of the Barrow Strait water column during the early Holocene. It is likely that the influence of CO 2 ‐rich Arctic surface water masses have caused an increase in bottom water corrosivity after ca. 8.5 ka, and dissolution has been further enhanced by sea ice‐related processes after ca. 6 ka, concomitant with increased IP 25 fluxes. Dissolution is strongest when IP 25 fluxes are highest, suggesting a link between the sea ice and benthic systems. Copyright © 2010 John Wiley & Sons, Ltd. Article in Journal/Newspaper Arctic Archipelago Arctic Canadian Arctic Archipelago Foraminifera* Sea ice Wiley Online Library Arctic Canadian Arctic Archipelago Barrow Strait ENVELOPE(-94.168,-94.168,74.402,74.402) Journal of Quaternary Science 25 6 903 910 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Holocene changes in the benthic and planktic foraminiferal fauna (>63 µm) from a marine sediment core (ARC‐3 Canadian Arctic Archipelago, 74° 16.050′ N, 91° 06.380′ W, water depth 347 m) show that significant environmental and palaeoceanographic variations occurred during the last 10 ka. Foraminiferal assemblages are restricted to the ca. 4.5–10 ka interval as younger samples are mostly barren of foraminifera due to intense carbonate dissolution after ca. 4.5 ka. Foraminiferal assemblages in the ca. 4.5–10 ka interval are dominated by the benthic species Islandiella helenae and Cassidulina reniforme (57% of total), with Elphidium clavatum , Cibicides lobatulus and Buccella frigida also being common in this interval. The dominance of these species indicates a seasonal sea ice regime which is consistent with the occurrence of the sea ice diatom‐derived organic geochemical biomarker IP 25 throughout the core. The abundances of C. reniforme and E. clavatum decline upcore; consistent with more frequent mixing of the Barrow Strait water column during the early Holocene. It is likely that the influence of CO 2 ‐rich Arctic surface water masses have caused an increase in bottom water corrosivity after ca. 8.5 ka, and dissolution has been further enhanced by sea ice‐related processes after ca. 6 ka, concomitant with increased IP 25 fluxes. Dissolution is strongest when IP 25 fluxes are highest, suggesting a link between the sea ice and benthic systems. Copyright © 2010 John Wiley & Sons, Ltd. |
author2 |
Natural Environment Research Council (NERC), UK |
format |
Article in Journal/Newspaper |
author |
Gregory, Thomas R. Smart, Christopher W. Hart, Malcolm B. Massé, Guillaume Vare, Lindsay L. Belt, Simon T. |
spellingShingle |
Gregory, Thomas R. Smart, Christopher W. Hart, Malcolm B. Massé, Guillaume Vare, Lindsay L. Belt, Simon T. Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence |
author_facet |
Gregory, Thomas R. Smart, Christopher W. Hart, Malcolm B. Massé, Guillaume Vare, Lindsay L. Belt, Simon T. |
author_sort |
Gregory, Thomas R. |
title |
Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence |
title_short |
Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence |
title_full |
Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence |
title_fullStr |
Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence |
title_full_unstemmed |
Holocene palaeoceanographic changes in Barrow Strait, Canadian Arctic: foraminiferal evidence |
title_sort |
holocene palaeoceanographic changes in barrow strait, canadian arctic: foraminiferal evidence |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1002/jqs.1367 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1367 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1367 |
long_lat |
ENVELOPE(-94.168,-94.168,74.402,74.402) |
geographic |
Arctic Canadian Arctic Archipelago Barrow Strait |
geographic_facet |
Arctic Canadian Arctic Archipelago Barrow Strait |
genre |
Arctic Archipelago Arctic Canadian Arctic Archipelago Foraminifera* Sea ice |
genre_facet |
Arctic Archipelago Arctic Canadian Arctic Archipelago Foraminifera* Sea ice |
op_source |
Journal of Quaternary Science volume 25, issue 6, page 903-910 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1367 |
container_title |
Journal of Quaternary Science |
container_volume |
25 |
container_issue |
6 |
container_start_page |
903 |
op_container_end_page |
910 |
_version_ |
1800743997838196736 |