A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic
New records of planktonic foraminiferal δ18O and lithic and foraminiferal counts from Eirik Drift are combined with published data from the Nordic Seas and the “Ice Rafted Debris (IRD) belt”, to portray a sequence of events through Heinrich event 1 (H1). These events progressed from an onset of melt...
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ftnerc:oai:nora.nerc.ac.uk:288311 2023-05-15T15:10:54+02:00 A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic Stanford, J.D. Rohling, E.J. Bacon, S. Roberts, A.P. Grousset, F.E. Bolshaw, M. 2011-05 application/pdf http://nora.nerc.ac.uk/id/eprint/288311/ https://nora.nerc.ac.uk/id/eprint/288311/1/Stanford_H1_2011.pdf en eng https://nora.nerc.ac.uk/id/eprint/288311/1/Stanford_H1_2011.pdf Stanford, J.D.; Rohling, E.J.; Bacon, S. orcid:0000-0002-2471-9373 Roberts, A.P.; Grousset, F.E.; Bolshaw, M. 2011 A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic. Quaternary Science Reviews, 30 (9-10). 1047-1066. https://doi.org/10.1016/j.quascirev.2011.02.003 <https://doi.org/10.1016/j.quascirev.2011.02.003> Publication - Article PeerReviewed 2011 ftnerc https://doi.org/10.1016/j.quascirev.2011.02.003 2023-02-04T19:35:49Z New records of planktonic foraminiferal δ18O and lithic and foraminiferal counts from Eirik Drift are combined with published data from the Nordic Seas and the “Ice Rafted Debris (IRD) belt”, to portray a sequence of events through Heinrich event 1 (H1). These events progressed from an onset of meltwater release at not, vert, similar19 ka BP, through the ‘conventional’ H1 IRD deposition phase in the IRD belt starting from not, vert, similar17.5 ka BP, to a final phase between 16.5 and not, vert, similar15 ka BP that was characterised by a pooling of freshwater in the Nordic Seas, which we suggest was hyperpycnally injected into that basin. After not, vert, similar15 ka BP, this freshwater was purged from the Nordic Seas into the North Atlantic, which preconditioned the Nordic Seas for convective deep-water formation. This allowed an abrupt re-start of North Atlantic Deep Water (NADW) formation in the Nordic Seas at the Bølling warming (14.6 ka BP). In contrast to previous estimates for the duration of H1 (i.e., 1000 years to only a century or two), the total, combined composite H1 signal presented here had a duration of over 4000 yrs (not, vert, similar19–14.6 ka BP), which spanned the entire period of NADW collapse. It appears that deep-water formation and climate are not simply controlled by the magnitude or rate of meltwater addition. Instead the location of meltwater injections may be more important, with NADW formation being particularly sensitive to surface freshening in the Arctic/Nordic Seas. Article in Journal/Newspaper Arctic Foraminifera* NADW Nordic Seas North Atlantic Deep Water North Atlantic Natural Environment Research Council: NERC Open Research Archive Arctic Tellus A: Dynamic Meteorology and Oceanography 65 1 20822 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
New records of planktonic foraminiferal δ18O and lithic and foraminiferal counts from Eirik Drift are combined with published data from the Nordic Seas and the “Ice Rafted Debris (IRD) belt”, to portray a sequence of events through Heinrich event 1 (H1). These events progressed from an onset of meltwater release at not, vert, similar19 ka BP, through the ‘conventional’ H1 IRD deposition phase in the IRD belt starting from not, vert, similar17.5 ka BP, to a final phase between 16.5 and not, vert, similar15 ka BP that was characterised by a pooling of freshwater in the Nordic Seas, which we suggest was hyperpycnally injected into that basin. After not, vert, similar15 ka BP, this freshwater was purged from the Nordic Seas into the North Atlantic, which preconditioned the Nordic Seas for convective deep-water formation. This allowed an abrupt re-start of North Atlantic Deep Water (NADW) formation in the Nordic Seas at the Bølling warming (14.6 ka BP). In contrast to previous estimates for the duration of H1 (i.e., 1000 years to only a century or two), the total, combined composite H1 signal presented here had a duration of over 4000 yrs (not, vert, similar19–14.6 ka BP), which spanned the entire period of NADW collapse. It appears that deep-water formation and climate are not simply controlled by the magnitude or rate of meltwater addition. Instead the location of meltwater injections may be more important, with NADW formation being particularly sensitive to surface freshening in the Arctic/Nordic Seas. |
format |
Article in Journal/Newspaper |
author |
Stanford, J.D. Rohling, E.J. Bacon, S. Roberts, A.P. Grousset, F.E. Bolshaw, M. |
spellingShingle |
Stanford, J.D. Rohling, E.J. Bacon, S. Roberts, A.P. Grousset, F.E. Bolshaw, M. A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic |
author_facet |
Stanford, J.D. Rohling, E.J. Bacon, S. Roberts, A.P. Grousset, F.E. Bolshaw, M. |
author_sort |
Stanford, J.D. |
title |
A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic |
title_short |
A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic |
title_full |
A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic |
title_fullStr |
A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic |
title_full_unstemmed |
A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic |
title_sort |
new concept for the paleoceanographic evolution of heinrich event 1 in the north atlantic |
publishDate |
2011 |
url |
http://nora.nerc.ac.uk/id/eprint/288311/ https://nora.nerc.ac.uk/id/eprint/288311/1/Stanford_H1_2011.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Foraminifera* NADW Nordic Seas North Atlantic Deep Water North Atlantic |
genre_facet |
Arctic Foraminifera* NADW Nordic Seas North Atlantic Deep Water North Atlantic |
op_relation |
https://nora.nerc.ac.uk/id/eprint/288311/1/Stanford_H1_2011.pdf Stanford, J.D.; Rohling, E.J.; Bacon, S. orcid:0000-0002-2471-9373 Roberts, A.P.; Grousset, F.E.; Bolshaw, M. 2011 A new concept for the paleoceanographic evolution of Heinrich event 1 in the North Atlantic. Quaternary Science Reviews, 30 (9-10). 1047-1066. https://doi.org/10.1016/j.quascirev.2011.02.003 <https://doi.org/10.1016/j.quascirev.2011.02.003> |
op_doi |
https://doi.org/10.1016/j.quascirev.2011.02.003 |
container_title |
Tellus A: Dynamic Meteorology and Oceanography |
container_volume |
65 |
container_issue |
1 |
container_start_page |
20822 |
_version_ |
1766341840828628992 |