Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas.
[1] In core top samples in the Nordic Seas, Mg/Ca ratios of N. pachyderma (sin.) are generally consistent with previous high-latitude calibration data but do not reflect the modern calcification temperature gradient from 2C in the northwest to 8C in the southeast. This is because Mg/Ca ratios in for...
Published in: | Geochemistry, Geophysics, Geosystems |
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Online Access: | http://eprints.esc.cam.ac.uk/533/ http://eprints.esc.cam.ac.uk/533/1/Elderfieldmg.pdf https://doi.org/10.1029/2005GC001078 |
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:533 2023-05-15T17:14:57+02:00 Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. Meland, M. Y. Jansen, E. Elderfield, H. Dokken, T. Olsen, A. Bellerby, R. G. J. 2006 application/pdf http://eprints.esc.cam.ac.uk/533/ http://eprints.esc.cam.ac.uk/533/1/Elderfieldmg.pdf https://doi.org/10.1029/2005GC001078 en eng http://eprints.esc.cam.ac.uk/533/1/Elderfieldmg.pdf Meland, M. Y. and Jansen, E. and Elderfield, H. and Dokken, T. and Olsen, A. and Bellerby, R. G. J. (2006) Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. G3 Geochemistry Geophysics Geosystems, 7. Q06P14. DOI https://doi.org/10.1029/2005GC001078 <https://doi.org/10.1029/2005GC001078> Article PeerReviewed 2006 ftucambridgeesc https://doi.org/10.1029/2005GC001078 2020-08-27T18:08:35Z [1] In core top samples in the Nordic Seas, Mg/Ca ratios of N. pachyderma (sin.) are generally consistent with previous high-latitude calibration data but do not reflect the modern calcification temperature gradient from 2C in the northwest to 8C in the southeast. This is because Mg/Ca ratios in foraminiferal shells from the central Nordic Seas are 0.4 mmol/mol higher than expected from calibrations of Nu¨rnberg (1995) and Elderfield and Ganssen (2000). The enhanced Mg/Ca ratios are observed in an area with low sedimentation rates (<5 cm/kyr). Possible factors that may cause this include bioturbation, Holocene variability in old core tops, dissolution, pore water chemistry, occurrence of volcanic ash, and other natural variability. The enhanced foraminiferal Mg/Ca ratios in areas of the Nordic Seas and the northern North Atlantic may also be linked with secondary factors related to the presence of fresher and colder water masses, possibly combined with pore water chemistry in low-sedimentation areas differing from highsedimentation areas. Article in Journal/Newspaper Neogloboquadrina pachyderma Nordic Seas North Atlantic University of Cambridge, Department of Earth Sciences: ESC Publications Geochemistry, Geophysics, Geosystems 7 6 n/a n/a |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
description |
[1] In core top samples in the Nordic Seas, Mg/Ca ratios of N. pachyderma (sin.) are generally consistent with previous high-latitude calibration data but do not reflect the modern calcification temperature gradient from 2C in the northwest to 8C in the southeast. This is because Mg/Ca ratios in foraminiferal shells from the central Nordic Seas are 0.4 mmol/mol higher than expected from calibrations of Nu¨rnberg (1995) and Elderfield and Ganssen (2000). The enhanced Mg/Ca ratios are observed in an area with low sedimentation rates (<5 cm/kyr). Possible factors that may cause this include bioturbation, Holocene variability in old core tops, dissolution, pore water chemistry, occurrence of volcanic ash, and other natural variability. The enhanced foraminiferal Mg/Ca ratios in areas of the Nordic Seas and the northern North Atlantic may also be linked with secondary factors related to the presence of fresher and colder water masses, possibly combined with pore water chemistry in low-sedimentation areas differing from highsedimentation areas. |
format |
Article in Journal/Newspaper |
author |
Meland, M. Y. Jansen, E. Elderfield, H. Dokken, T. Olsen, A. Bellerby, R. G. J. |
spellingShingle |
Meland, M. Y. Jansen, E. Elderfield, H. Dokken, T. Olsen, A. Bellerby, R. G. J. Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. |
author_facet |
Meland, M. Y. Jansen, E. Elderfield, H. Dokken, T. Olsen, A. Bellerby, R. G. J. |
author_sort |
Meland, M. Y. |
title |
Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. |
title_short |
Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. |
title_full |
Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. |
title_fullStr |
Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. |
title_full_unstemmed |
Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. |
title_sort |
mg/ca ratios in the planktonic foraminifer neogloboquadrina pachyderma (sinistral) in the northern north atlantic/nordic seas. |
publishDate |
2006 |
url |
http://eprints.esc.cam.ac.uk/533/ http://eprints.esc.cam.ac.uk/533/1/Elderfieldmg.pdf https://doi.org/10.1029/2005GC001078 |
genre |
Neogloboquadrina pachyderma Nordic Seas North Atlantic |
genre_facet |
Neogloboquadrina pachyderma Nordic Seas North Atlantic |
op_relation |
http://eprints.esc.cam.ac.uk/533/1/Elderfieldmg.pdf Meland, M. Y. and Jansen, E. and Elderfield, H. and Dokken, T. and Olsen, A. and Bellerby, R. G. J. (2006) Mg/Ca ratios in the planktonic foraminifer Neogloboquadrina pachyderma (sinistral) in the northern North Atlantic/Nordic Seas. G3 Geochemistry Geophysics Geosystems, 7. Q06P14. DOI https://doi.org/10.1029/2005GC001078 <https://doi.org/10.1029/2005GC001078> |
op_doi |
https://doi.org/10.1029/2005GC001078 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
7 |
container_issue |
6 |
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n/a |
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1766073066482302976 |