Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17
Down-core samples of the planktonic foraminifer Neogloboquadrina pachyderma sinistral from the Mendeleyev Ridge in the western Arctic Ocean have been analyzed for Ba/Ca and d18O. The apparent distribution coefficient for N. pachyderma sin. is estimated at DBa = 0.22 ± 0.02. A meltwater event is iden...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.840848 2023-05-15T14:25:02+02:00 Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17 Hall, Jenney M Chan, Lui-Heung LATITUDE: 81.265170 * LONGITUDE: 178.967500 2004-12-18 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.840848 https://doi.org/10.1594/PANGAEA.840848 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.840848 https://doi.org/10.1594/PANGAEA.840848 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hall, Jenney M; Chan, Lui-Heung (2004): Ba/Ca in Neogloboquadrina pachyderma as an indicator of deglacial meltwater discharge into the western Arctic Ocean. Paleoceanography, 19(1), PA1017, https://doi.org/10.1029/2003PA000910 94B17 Arctic Ocean BC Box corer Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.840848 https://doi.org/10.1029/2003PA000910 2023-01-20T07:33:24Z Down-core samples of the planktonic foraminifer Neogloboquadrina pachyderma sinistral from the Mendeleyev Ridge in the western Arctic Ocean have been analyzed for Ba/Ca and d18O. The apparent distribution coefficient for N. pachyderma sin. is estimated at DBa = 0.22 ± 0.02. A meltwater event is identified at around 11.8 14C kyr BP and is coincident with elevated Ba/Ca ratios. The barium enrichment is believed to be the result of enhanced weathering and erosion following glaciation. Additionally, barium may have desorbed from shelf sediments as sea level rose. Changes in Ba/Ca correlate with the retreat of the Laurentide Ice Sheet and the evolution of the Mackenzie River drainage basin. Therefore maximum Ba/Ca in Arctic surface waters at 11.8 ka may be indicative of an increase in the export of freshwater from the Arctic to the North Atlantic, potentially contributing to the onset of the Younger Dryas. This work suggests that Ba/Ca in planktonic foraminifera may be a useful indicator of the timing and processes associated with deglaciation. Dataset Arctic Arctic Arctic Ocean Foraminifera* Ice Sheet Mackenzie river Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Mackenzie River Mendeleyev ENVELOPE(14.517,14.517,-71.900,-71.900) Mendeleyev Ridge ENVELOPE(-178.000,-178.000,80.000,80.000) ENVELOPE(178.967500,178.967500,81.265170,81.265170) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
94B17 Arctic Ocean BC Box corer |
spellingShingle |
94B17 Arctic Ocean BC Box corer Hall, Jenney M Chan, Lui-Heung Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17 |
topic_facet |
94B17 Arctic Ocean BC Box corer |
description |
Down-core samples of the planktonic foraminifer Neogloboquadrina pachyderma sinistral from the Mendeleyev Ridge in the western Arctic Ocean have been analyzed for Ba/Ca and d18O. The apparent distribution coefficient for N. pachyderma sin. is estimated at DBa = 0.22 ± 0.02. A meltwater event is identified at around 11.8 14C kyr BP and is coincident with elevated Ba/Ca ratios. The barium enrichment is believed to be the result of enhanced weathering and erosion following glaciation. Additionally, barium may have desorbed from shelf sediments as sea level rose. Changes in Ba/Ca correlate with the retreat of the Laurentide Ice Sheet and the evolution of the Mackenzie River drainage basin. Therefore maximum Ba/Ca in Arctic surface waters at 11.8 ka may be indicative of an increase in the export of freshwater from the Arctic to the North Atlantic, potentially contributing to the onset of the Younger Dryas. This work suggests that Ba/Ca in planktonic foraminifera may be a useful indicator of the timing and processes associated with deglaciation. |
format |
Dataset |
author |
Hall, Jenney M Chan, Lui-Heung |
author_facet |
Hall, Jenney M Chan, Lui-Heung |
author_sort |
Hall, Jenney M |
title |
Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17 |
title_short |
Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17 |
title_full |
Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17 |
title_fullStr |
Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17 |
title_full_unstemmed |
Ba/Ca ratios in Neogloboquadrina pachyderma of sedimet core 94B17 |
title_sort |
ba/ca ratios in neogloboquadrina pachyderma of sedimet core 94b17 |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.840848 https://doi.org/10.1594/PANGAEA.840848 |
op_coverage |
LATITUDE: 81.265170 * LONGITUDE: 178.967500 |
long_lat |
ENVELOPE(14.517,14.517,-71.900,-71.900) ENVELOPE(-178.000,-178.000,80.000,80.000) ENVELOPE(178.967500,178.967500,81.265170,81.265170) |
geographic |
Arctic Arctic Ocean Mackenzie River Mendeleyev Mendeleyev Ridge |
geographic_facet |
Arctic Arctic Ocean Mackenzie River Mendeleyev Mendeleyev Ridge |
genre |
Arctic Arctic Arctic Ocean Foraminifera* Ice Sheet Mackenzie river Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera |
genre_facet |
Arctic Arctic Arctic Ocean Foraminifera* Ice Sheet Mackenzie river Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera |
op_source |
Supplement to: Hall, Jenney M; Chan, Lui-Heung (2004): Ba/Ca in Neogloboquadrina pachyderma as an indicator of deglacial meltwater discharge into the western Arctic Ocean. Paleoceanography, 19(1), PA1017, https://doi.org/10.1029/2003PA000910 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.840848 https://doi.org/10.1594/PANGAEA.840848 |
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.840848 https://doi.org/10.1029/2003PA000910 |
_version_ |
1766297471320850432 |