Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay
A multiproxy study of palaeoceanographic and climatic changes in northernmost Baffin Bay shows that major environmental changes have occurred since the deglaciation of the area at about 12 500 cal. yr BP. The interpretation is based on sedimentology, benthic and planktonic foraminifera and their iso...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.785726 2023-05-15T15:03:39+02:00 Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay Knudsen, Karen Luise Stabell, Bjorg Seidenkrantz, Marit-Solveig Eiriksson, Jón Blake, Weston Jr MEDIAN LATITUDE: 76.897340 * MEDIAN LONGITUDE: -72.352980 * SOUTH-BOUND LATITUDE: 76.805000 * WEST-BOUND LONGITUDE: -74.331700 * NORTH-BOUND LATITUDE: 77.266700 * EAST-BOUND LONGITUDE: -71.858300 2008-07-09 application/zip, 10 datasets https://doi.pangaea.de/10.1594/PANGAEA.785726 https://doi.org/10.1594/PANGAEA.785726 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.785726 https://doi.org/10.1594/PANGAEA.785726 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Knudsen, Karen Luise; Stabell, Bjorg; Seidenkrantz, Marit-Solveig; Eiriksson, Jón; Blake, Weston Jr (2008): Deglacial and Holocene conditions in northernmost Baffin Bay: sediments, foraminifera, diatoms and stable isotopes. Boreas, 37(3), 346-376, https://doi.org/10.1111/j.1502-3885.2008.00035.x Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.785726 https://doi.org/10.1111/j.1502-3885.2008.00035.x 2023-01-20T07:32:36Z A multiproxy study of palaeoceanographic and climatic changes in northernmost Baffin Bay shows that major environmental changes have occurred since the deglaciation of the area at about 12 500 cal. yr BP. The interpretation is based on sedimentology, benthic and planktonic foraminifera and their isotopic composition, as well as diatom assemblages in the sedimentary records at two core sites, one located in the deeper central part of northernmost Baffin Bay and one in a separate trough closer to the Greenland coast. A revised chronology for the two records is established on the basis of 15 previously published AMS 14C age determinations. A basal diamicton is overlain by laminated, fossil-free sediments. Our data from the early part of the fossiliferous record (12 300 - 11 300 cal. yr BP), which is also initially laminated, indicate extensive seasonal sea-ice cover and brine release. There is indication of a cooling event between 11 300 and 10 900 cal. yr BP, and maximum Atlantic Water influence occurred between 10 900 and 8200 cal. yr BP (no sediment recovery between 8200 and 7300 cal. yr BP). A gradual, but fluctuating, increase in sea-ice cover is seen after 7300 cal. yr BP. Sea-ice diatoms were particularly abundant in the central part of northernmost Baffin Bay, presumably due to the inflow of Polar waters from the Arctic Ocean, and less sea ice occurred at the near-coastal site, which was under continuous influence of the West Greenland Current. Our data from the deep, central part show a fluctuating degree of upwelling after c. 7300 cal. yr BP, culminating between 4000 and 3050 cal. yr BP. There was a gradual increase in the influence of cold bottom waters from the Arctic Ocean after about 3050 cal. yr BP, when agglutinated foraminifera became abundant. A superimposed short-term change in the sea-surface proxies is correlated with the Little Ice Age cooling. Dataset Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Foraminifera* Greenland Planktonic foraminifera Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Baffin Bay Greenland ENVELOPE(-74.331700,-71.858300,77.266700,76.805000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
A multiproxy study of palaeoceanographic and climatic changes in northernmost Baffin Bay shows that major environmental changes have occurred since the deglaciation of the area at about 12 500 cal. yr BP. The interpretation is based on sedimentology, benthic and planktonic foraminifera and their isotopic composition, as well as diatom assemblages in the sedimentary records at two core sites, one located in the deeper central part of northernmost Baffin Bay and one in a separate trough closer to the Greenland coast. A revised chronology for the two records is established on the basis of 15 previously published AMS 14C age determinations. A basal diamicton is overlain by laminated, fossil-free sediments. Our data from the early part of the fossiliferous record (12 300 - 11 300 cal. yr BP), which is also initially laminated, indicate extensive seasonal sea-ice cover and brine release. There is indication of a cooling event between 11 300 and 10 900 cal. yr BP, and maximum Atlantic Water influence occurred between 10 900 and 8200 cal. yr BP (no sediment recovery between 8200 and 7300 cal. yr BP). A gradual, but fluctuating, increase in sea-ice cover is seen after 7300 cal. yr BP. Sea-ice diatoms were particularly abundant in the central part of northernmost Baffin Bay, presumably due to the inflow of Polar waters from the Arctic Ocean, and less sea ice occurred at the near-coastal site, which was under continuous influence of the West Greenland Current. Our data from the deep, central part show a fluctuating degree of upwelling after c. 7300 cal. yr BP, culminating between 4000 and 3050 cal. yr BP. There was a gradual increase in the influence of cold bottom waters from the Arctic Ocean after about 3050 cal. yr BP, when agglutinated foraminifera became abundant. A superimposed short-term change in the sea-surface proxies is correlated with the Little Ice Age cooling. |
format |
Dataset |
author |
Knudsen, Karen Luise Stabell, Bjorg Seidenkrantz, Marit-Solveig Eiriksson, Jón Blake, Weston Jr |
spellingShingle |
Knudsen, Karen Luise Stabell, Bjorg Seidenkrantz, Marit-Solveig Eiriksson, Jón Blake, Weston Jr Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay |
author_facet |
Knudsen, Karen Luise Stabell, Bjorg Seidenkrantz, Marit-Solveig Eiriksson, Jón Blake, Weston Jr |
author_sort |
Knudsen, Karen Luise |
title |
Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay |
title_short |
Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay |
title_full |
Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay |
title_fullStr |
Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay |
title_full_unstemmed |
Planktonic and benthic stables Isotopes, age model and carbon analysis of HUD91/039 from the northernmost Baffin Bay |
title_sort |
planktonic and benthic stables isotopes, age model and carbon analysis of hud91/039 from the northernmost baffin bay |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.785726 https://doi.org/10.1594/PANGAEA.785726 |
op_coverage |
MEDIAN LATITUDE: 76.897340 * MEDIAN LONGITUDE: -72.352980 * SOUTH-BOUND LATITUDE: 76.805000 * WEST-BOUND LONGITUDE: -74.331700 * NORTH-BOUND LATITUDE: 77.266700 * EAST-BOUND LONGITUDE: -71.858300 |
long_lat |
ENVELOPE(-74.331700,-71.858300,77.266700,76.805000) |
geographic |
Arctic Arctic Ocean Baffin Bay Greenland |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Greenland |
genre |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Foraminifera* Greenland Planktonic foraminifera Sea ice |
genre_facet |
Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Foraminifera* Greenland Planktonic foraminifera Sea ice |
op_source |
Supplement to: Knudsen, Karen Luise; Stabell, Bjorg; Seidenkrantz, Marit-Solveig; Eiriksson, Jón; Blake, Weston Jr (2008): Deglacial and Holocene conditions in northernmost Baffin Bay: sediments, foraminifera, diatoms and stable isotopes. Boreas, 37(3), 346-376, https://doi.org/10.1111/j.1502-3885.2008.00035.x |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.785726 https://doi.org/10.1594/PANGAEA.785726 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.785726 https://doi.org/10.1111/j.1502-3885.2008.00035.x |
_version_ |
1766335508165689344 |