Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events
[ 1] The timing of meltwater release in the southern Norwegian Sea in relation to millennial-scale climate variability is studied from core MD99-2283 based on down-core analysis of stable oxygen and carbon isotopes, calcium carbonate and ice-rafted debris (IRD). Between 20 and 40 calendar (cal) kyr...
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ftarchimer:oai:archimer.ifremer.fr:34525 2023-05-15T16:13:04+02:00 Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events Lekens, W. A. H. Sejrup, H. P. Haflidason, H. Knies, J. Richter, T. 2006-09 application/pdf https://archimer.ifremer.fr/doc/00234/34525/33431.pdf https://doi.org/10.1029/2005PA001228 https://archimer.ifremer.fr/doc/00234/34525/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00234/34525/33431.pdf doi:10.1029/2005PA001228 https://archimer.ifremer.fr/doc/00234/34525/ 2006 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Paleoceanography (0883-8305) (Amer Geophysical Union), 2006-09 , Vol. 21 , N. 3 / PA3013 , P. 1-17 meltwater Nordic Seas Heinrich events text Publication info:eu-repo/semantics/article 2006 ftarchimer https://doi.org/10.1029/2005PA001228 2021-09-23T20:25:21Z [ 1] The timing of meltwater release in the southern Norwegian Sea in relation to millennial-scale climate variability is studied from core MD99-2283 based on down-core analysis of stable oxygen and carbon isotopes, calcium carbonate and ice-rafted debris (IRD). Between 20 and 40 calendar (cal) kyr B. P., strong Dansgaard-Oeschger cyclicity is expressed in increased carbonate content and reduced total organic carbon during warm interstadials and IRD marking the end of cold stadials. The planktonic delta(18)O record of core MD99-2283 compared to available isotopic records in the region confirms the existence of multisourced, synchronized meltwater anomalies during Heinrich ( H) events 2 to 4. It was found that the sudden release of meltwater occurs near major ice streams and that no significant increase in IRD was associated with the peaks of the meltwater events in the southern Norwegian Sea, suggesting meltwater discharges from ice-dammed lakes. Significant meltwater events not related to the H events were also observed between 33 and 35 cal kyr B. P., indicating that the release of meltwater is not necessarily connected with major cooling and enhanced IRD delivery. The simultaneous release of fresh water during H events in the Nordic Seas, through icebergs and ice-dammed lakes, is thought to be the result of sea level increase. The meltwater input to the Nordic Seas provides a significant additional contribution to global sea level rise associated with H3 and H4. Article in Journal/Newspaper Fennoscandian Nordic Seas Norwegian Sea Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Norwegian Sea Paleoceanography 21 3 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
meltwater Nordic Seas Heinrich events |
spellingShingle |
meltwater Nordic Seas Heinrich events Lekens, W. A. H. Sejrup, H. P. Haflidason, H. Knies, J. Richter, T. Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events |
topic_facet |
meltwater Nordic Seas Heinrich events |
description |
[ 1] The timing of meltwater release in the southern Norwegian Sea in relation to millennial-scale climate variability is studied from core MD99-2283 based on down-core analysis of stable oxygen and carbon isotopes, calcium carbonate and ice-rafted debris (IRD). Between 20 and 40 calendar (cal) kyr B. P., strong Dansgaard-Oeschger cyclicity is expressed in increased carbonate content and reduced total organic carbon during warm interstadials and IRD marking the end of cold stadials. The planktonic delta(18)O record of core MD99-2283 compared to available isotopic records in the region confirms the existence of multisourced, synchronized meltwater anomalies during Heinrich ( H) events 2 to 4. It was found that the sudden release of meltwater occurs near major ice streams and that no significant increase in IRD was associated with the peaks of the meltwater events in the southern Norwegian Sea, suggesting meltwater discharges from ice-dammed lakes. Significant meltwater events not related to the H events were also observed between 33 and 35 cal kyr B. P., indicating that the release of meltwater is not necessarily connected with major cooling and enhanced IRD delivery. The simultaneous release of fresh water during H events in the Nordic Seas, through icebergs and ice-dammed lakes, is thought to be the result of sea level increase. The meltwater input to the Nordic Seas provides a significant additional contribution to global sea level rise associated with H3 and H4. |
format |
Article in Journal/Newspaper |
author |
Lekens, W. A. H. Sejrup, H. P. Haflidason, H. Knies, J. Richter, T. |
author_facet |
Lekens, W. A. H. Sejrup, H. P. Haflidason, H. Knies, J. Richter, T. |
author_sort |
Lekens, W. A. H. |
title |
Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events |
title_short |
Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events |
title_full |
Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events |
title_fullStr |
Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events |
title_full_unstemmed |
Meltwater and ice rafting in the southern Norwegian Sea between 20 and 40 calendar kyr BP: Implications for Fennoscandian Heinrich events |
title_sort |
meltwater and ice rafting in the southern norwegian sea between 20 and 40 calendar kyr bp: implications for fennoscandian heinrich events |
publisher |
Amer Geophysical Union |
publishDate |
2006 |
url |
https://archimer.ifremer.fr/doc/00234/34525/33431.pdf https://doi.org/10.1029/2005PA001228 https://archimer.ifremer.fr/doc/00234/34525/ |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
Fennoscandian Nordic Seas Norwegian Sea |
genre_facet |
Fennoscandian Nordic Seas Norwegian Sea |
op_source |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2006-09 , Vol. 21 , N. 3 / PA3013 , P. 1-17 |
op_relation |
https://archimer.ifremer.fr/doc/00234/34525/33431.pdf doi:10.1029/2005PA001228 https://archimer.ifremer.fr/doc/00234/34525/ |
op_rights |
2006 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2005PA001228 |
container_title |
Paleoceanography |
container_volume |
21 |
container_issue |
3 |
_version_ |
1765998675785416704 |