Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity.
By correlating the climate records and radiocarbon ages of the planktonic foraminifera N. pachyderma(s) of deep-sea core PS2644 from the Iceland Sea with the annual-layer chronology of the GISP2 ice core, we obtained 80 marine (super 14) C calibration points for the interval 11.4-53.3 ka cal BP. Bet...
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Radiocarbon
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/3834 2023-05-15T15:16:39+02:00 Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity. Voelker, Antje L Grootes, Pieter M Nadeau, Marie Josee Sarnthein, Michael 2000-01-01 application/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3834 eng eng Radiocarbon https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3834/3259 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3834 Radiocarbon; Vol 42, No 3 (2000); 437-452 0033-8222 Neogloboquadrina pachyderma;Iceland Sea;Heinrich events;Summit Greenland;GRIP;meltwater;magnetic intensity;planktonic taxa;paleomagnetism;Globigerinacea;Rotaliina;Arctic region;Greenland;GISP2;ice cores;magnetic field;Atlantic Ocean;North Atlantic;calibration;Foraminifera;Protista;atmosphere;microfossils;correlation;Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;Invertebrata;absolute age info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2000 ftunivarizonaojs 2020-11-14T16:10:02Z By correlating the climate records and radiocarbon ages of the planktonic foraminifera N. pachyderma(s) of deep-sea core PS2644 from the Iceland Sea with the annual-layer chronology of the GISP2 ice core, we obtained 80 marine (super 14) C calibration points for the interval 11.4-53.3 ka cal BP. Between 27 and 54 ka cal BP the continuous record of (super 14) C/cal age differences reveals three intervals of highly increased (super 14) C concentrations coincident with low values of paleomagnetic field intensity, two of which are attributed to the geomagnetic Mono Lake and Laschamp excursions (33.5-34.5 ka cal BP with maximum 550 per mil marine Delta (super 14) C, and 40.3-41.7 ka cal BP with maximum 1215 per mil marine Delta (super 14) C, respectively). A third maximum (marine Delta (super 14) C: 755 per mil) is observed around 38 ka cal BP and attributed to the geomagnetic intensity minimum following the Laschamp excursion. During all three events the Delta (super 14) C values increase rapidly with maximum values occurring at the end of the respective geomagnetic intensity minimum. During the Mono Lake Event, however, our Delta (super 14) C values seem to underestimate the atmospheric level, if compared to the (super 36) Cl flux measured in the GRIP ice core (Wagner et al. 2000) and other records. As this excursion coincides with a meltwater event in core PS2644, the underestimation is probably caused by an increased planktonic reservoir age. The same effect also occurs from 38.5 to 40 ka cal BP when the meltwater lid of Heinrich Event 4 affected the planktonic record. Article in Journal/Newspaper Arctic Foraminifera* Greenland GRIP ice core Iceland Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera Journals at the University of Arizona Arctic Greenland |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
topic |
Neogloboquadrina pachyderma;Iceland Sea;Heinrich events;Summit Greenland;GRIP;meltwater;magnetic intensity;planktonic taxa;paleomagnetism;Globigerinacea;Rotaliina;Arctic region;Greenland;GISP2;ice cores;magnetic field;Atlantic Ocean;North Atlantic;calibration;Foraminifera;Protista;atmosphere;microfossils;correlation;Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;Invertebrata;absolute age |
spellingShingle |
Neogloboquadrina pachyderma;Iceland Sea;Heinrich events;Summit Greenland;GRIP;meltwater;magnetic intensity;planktonic taxa;paleomagnetism;Globigerinacea;Rotaliina;Arctic region;Greenland;GISP2;ice cores;magnetic field;Atlantic Ocean;North Atlantic;calibration;Foraminifera;Protista;atmosphere;microfossils;correlation;Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;Invertebrata;absolute age Voelker, Antje L Grootes, Pieter M Nadeau, Marie Josee Sarnthein, Michael Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity. |
topic_facet |
Neogloboquadrina pachyderma;Iceland Sea;Heinrich events;Summit Greenland;GRIP;meltwater;magnetic intensity;planktonic taxa;paleomagnetism;Globigerinacea;Rotaliina;Arctic region;Greenland;GISP2;ice cores;magnetic field;Atlantic Ocean;North Atlantic;calibration;Foraminifera;Protista;atmosphere;microfossils;correlation;Pleistocene;Cenozoic;Quaternary;C 14;carbon;dates;isotopes;radioactive isotopes;Invertebrata;absolute age |
description |
By correlating the climate records and radiocarbon ages of the planktonic foraminifera N. pachyderma(s) of deep-sea core PS2644 from the Iceland Sea with the annual-layer chronology of the GISP2 ice core, we obtained 80 marine (super 14) C calibration points for the interval 11.4-53.3 ka cal BP. Between 27 and 54 ka cal BP the continuous record of (super 14) C/cal age differences reveals three intervals of highly increased (super 14) C concentrations coincident with low values of paleomagnetic field intensity, two of which are attributed to the geomagnetic Mono Lake and Laschamp excursions (33.5-34.5 ka cal BP with maximum 550 per mil marine Delta (super 14) C, and 40.3-41.7 ka cal BP with maximum 1215 per mil marine Delta (super 14) C, respectively). A third maximum (marine Delta (super 14) C: 755 per mil) is observed around 38 ka cal BP and attributed to the geomagnetic intensity minimum following the Laschamp excursion. During all three events the Delta (super 14) C values increase rapidly with maximum values occurring at the end of the respective geomagnetic intensity minimum. During the Mono Lake Event, however, our Delta (super 14) C values seem to underestimate the atmospheric level, if compared to the (super 36) Cl flux measured in the GRIP ice core (Wagner et al. 2000) and other records. As this excursion coincides with a meltwater event in core PS2644, the underestimation is probably caused by an increased planktonic reservoir age. The same effect also occurs from 38.5 to 40 ka cal BP when the meltwater lid of Heinrich Event 4 affected the planktonic record. |
format |
Article in Journal/Newspaper |
author |
Voelker, Antje L Grootes, Pieter M Nadeau, Marie Josee Sarnthein, Michael |
author_facet |
Voelker, Antje L Grootes, Pieter M Nadeau, Marie Josee Sarnthein, Michael |
author_sort |
Voelker, Antje L |
title |
Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity. |
title_short |
Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity. |
title_full |
Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity. |
title_fullStr |
Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity. |
title_full_unstemmed |
Radiocarbon levels in the Iceland Sea from 25-53 kyr and their link to the Earth's magnetic field intensity. |
title_sort |
radiocarbon levels in the iceland sea from 25-53 kyr and their link to the earth's magnetic field intensity. |
publisher |
Radiocarbon |
publishDate |
2000 |
url |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3834 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Foraminifera* Greenland GRIP ice core Iceland Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera |
genre_facet |
Arctic Foraminifera* Greenland GRIP ice core Iceland Neogloboquadrina pachyderma North Atlantic Planktonic foraminifera |
op_source |
Radiocarbon; Vol 42, No 3 (2000); 437-452 0033-8222 |
op_relation |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3834/3259 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/3834 |
_version_ |
1766346948818763776 |