8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry
The abrupt 8.2 ka cold event has been widely described from Greenland and North Atlantic records. However, its expression in shelf seas is poorly documented, and the temporal resolution of most marine records is inadequate to precisely determine the chronology of major events. A robust hydrographica...
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ftuglasgow:oai:eprints.gla.ac.uk:186073 2023-05-15T14:57:07+02:00 8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry Estrella-Martínez, Juan Ascough, Philippa L. Schöne, Bernd R. Scourse, James D. Butler, Paul G. 2019-05-01 text http://eprints.gla.ac.uk/186073/ http://eprints.gla.ac.uk/186073/1/186073.pdf en eng Nature Research http://eprints.gla.ac.uk/186073/1/186073.pdf Estrella-Martínez, J., Ascough, P. L. <http://eprints.gla.ac.uk/view/author/11034.html> , Schöne, B. R., Scourse, J. D. and Butler, P. G. (2019) 8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry. Scientific Reports <http://eprints.gla.ac.uk/view/journal_volume/Scientific_Reports.html>, 9(1), 6753. (doi:10.1038/s41598-019-43219-1 <http://dx.doi.org/10.1038/s41598-019-43219-1>) (PMID:31043648) (PMCID:PMC6494846) cc_by_4 CC-BY Articles PeerReviewed 2019 ftuglasgow https://doi.org/10.1038/s41598-019-43219-1 2020-09-03T22:09:26Z The abrupt 8.2 ka cold event has been widely described from Greenland and North Atlantic records. However, its expression in shelf seas is poorly documented, and the temporal resolution of most marine records is inadequate to precisely determine the chronology of major events. A robust hydrographical reconstruction can provide an insight on climatic reaction times to perturbations to the Atlantic Meridional Overturning Circulation. Here we present an annually-resolved temperature and water column stratification reconstruction based on stable isotope geochemistry of Arctica islandica shells from the Fladen Ground (northern North Sea) temporally coherent with Greenland ice core records. Our age model is based on a growth increment chronology obtained from four radiometrically-dated shells covering the 8290–8100 cal BP interval. Our results indicate that a sudden sea level rise (SSLR) event-driven column stratification occurred between ages 8320–8220 cal BP. Thirty years later, cold conditions inhibited water column stratification but an eventual incursion of sub-Arctic waters into the North Sea re-established density-driven stratification. The water temperatures reached their minimum of ~3.7 °C 55 years after the SSLR. Intermittently-mixed conditions were later established when the sub-Arctic waters receded. Article in Journal/Newspaper Arctic Arctica islandica Greenland Greenland ice core ice core North Atlantic University of Glasgow: Enlighten - Publications Arctic Greenland Scientific Reports 9 1 |
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Open Polar |
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University of Glasgow: Enlighten - Publications |
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ftuglasgow |
language |
English |
description |
The abrupt 8.2 ka cold event has been widely described from Greenland and North Atlantic records. However, its expression in shelf seas is poorly documented, and the temporal resolution of most marine records is inadequate to precisely determine the chronology of major events. A robust hydrographical reconstruction can provide an insight on climatic reaction times to perturbations to the Atlantic Meridional Overturning Circulation. Here we present an annually-resolved temperature and water column stratification reconstruction based on stable isotope geochemistry of Arctica islandica shells from the Fladen Ground (northern North Sea) temporally coherent with Greenland ice core records. Our age model is based on a growth increment chronology obtained from four radiometrically-dated shells covering the 8290–8100 cal BP interval. Our results indicate that a sudden sea level rise (SSLR) event-driven column stratification occurred between ages 8320–8220 cal BP. Thirty years later, cold conditions inhibited water column stratification but an eventual incursion of sub-Arctic waters into the North Sea re-established density-driven stratification. The water temperatures reached their minimum of ~3.7 °C 55 years after the SSLR. Intermittently-mixed conditions were later established when the sub-Arctic waters receded. |
format |
Article in Journal/Newspaper |
author |
Estrella-Martínez, Juan Ascough, Philippa L. Schöne, Bernd R. Scourse, James D. Butler, Paul G. |
spellingShingle |
Estrella-Martínez, Juan Ascough, Philippa L. Schöne, Bernd R. Scourse, James D. Butler, Paul G. 8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry |
author_facet |
Estrella-Martínez, Juan Ascough, Philippa L. Schöne, Bernd R. Scourse, James D. Butler, Paul G. |
author_sort |
Estrella-Martínez, Juan |
title |
8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry |
title_short |
8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry |
title_full |
8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry |
title_fullStr |
8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry |
title_full_unstemmed |
8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry |
title_sort |
8.2 ka event north sea hydrography determined by bivalve shell stable isotope geochemistry |
publisher |
Nature Research |
publishDate |
2019 |
url |
http://eprints.gla.ac.uk/186073/ http://eprints.gla.ac.uk/186073/1/186073.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctica islandica Greenland Greenland ice core ice core North Atlantic |
genre_facet |
Arctic Arctica islandica Greenland Greenland ice core ice core North Atlantic |
op_relation |
http://eprints.gla.ac.uk/186073/1/186073.pdf Estrella-Martínez, J., Ascough, P. L. <http://eprints.gla.ac.uk/view/author/11034.html> , Schöne, B. R., Scourse, J. D. and Butler, P. G. (2019) 8.2 ka event North Sea hydrography determined by bivalve shell stable isotope geochemistry. Scientific Reports <http://eprints.gla.ac.uk/view/journal_volume/Scientific_Reports.html>, 9(1), 6753. (doi:10.1038/s41598-019-43219-1 <http://dx.doi.org/10.1038/s41598-019-43219-1>) (PMID:31043648) (PMCID:PMC6494846) |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-019-43219-1 |
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Scientific Reports |
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1766329206030991360 |