Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts
Abstract High‐resolution marine palynological data have been obtained from two very long sediment cores (MD952009 and MD952010) retrieved from the southern Norwegian Sea. The dinoflagellate cyst assemblages show pronounced fluctuations in composition, which correlate strongly with magnetic susceptib...
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crwiley:10.1002/jqs.676 2024-06-02T08:07:17+00:00 Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts Eynaud, F. Turon, J. L. Matthiessen, J. Kissel, C. Peypouquet, J. P. de Vernal, A. Henry, M. 2002 http://dx.doi.org/10.1002/jqs.676 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.676 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.676 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 17, issue 4, page 349-359 ISSN 0267-8179 1099-1417 journal-article 2002 crwiley https://doi.org/10.1002/jqs.676 2024-05-03T10:47:21Z Abstract High‐resolution marine palynological data have been obtained from two very long sediment cores (MD952009 and MD952010) retrieved from the southern Norwegian Sea. The dinoflagellate cyst assemblages show pronounced fluctuations in composition, which correlate strongly with magnetic susceptibility records and also mimic the δ 18 O signal of the GISP2 Greenland ice‐core. If focusing on the period from 48 to 30 cal. kyr BP, this correlation suggests a paradoxical response of the sea‐surface environments to the atmospheric conditions over Greenland: when the Greenland δ 18 O signal reflects warm interstadial conditions, the Norwegian Sea depicts cold sea‐surface temperatures with quasi‐perennial sea‐ice cover (based on dinoflagellate cysts). In contrast, when the Greenland δ 18 O records cold stadial periods, the Norwegian Sea‐surface temperatures are warm (based on dinoflagellate cysts), probably linked to inflow of the North Atlantic Drift. These results, similar in both cores, are contrary to those of previous studies and shed light on a possible decoupling of Norwegian sea surface‐water conditions and atmospheric conditions over Greenland. This decoupling could be linked to an atmosphere–ocean system behaving similar to that which the Northern Hemisphere is experiencing at present, i.e. strongly variable owing to the North Atlantic Oscillation. Copyright © 2002 John Wiley & Sons, Ltd. Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic North Atlantic oscillation Norwegian Sea Sea ice Wiley Online Library Greenland Norwegian Sea Journal of Quaternary Science 17 4 349 359 |
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English |
description |
Abstract High‐resolution marine palynological data have been obtained from two very long sediment cores (MD952009 and MD952010) retrieved from the southern Norwegian Sea. The dinoflagellate cyst assemblages show pronounced fluctuations in composition, which correlate strongly with magnetic susceptibility records and also mimic the δ 18 O signal of the GISP2 Greenland ice‐core. If focusing on the period from 48 to 30 cal. kyr BP, this correlation suggests a paradoxical response of the sea‐surface environments to the atmospheric conditions over Greenland: when the Greenland δ 18 O signal reflects warm interstadial conditions, the Norwegian Sea depicts cold sea‐surface temperatures with quasi‐perennial sea‐ice cover (based on dinoflagellate cysts). In contrast, when the Greenland δ 18 O records cold stadial periods, the Norwegian Sea‐surface temperatures are warm (based on dinoflagellate cysts), probably linked to inflow of the North Atlantic Drift. These results, similar in both cores, are contrary to those of previous studies and shed light on a possible decoupling of Norwegian sea surface‐water conditions and atmospheric conditions over Greenland. This decoupling could be linked to an atmosphere–ocean system behaving similar to that which the Northern Hemisphere is experiencing at present, i.e. strongly variable owing to the North Atlantic Oscillation. Copyright © 2002 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Eynaud, F. Turon, J. L. Matthiessen, J. Kissel, C. Peypouquet, J. P. de Vernal, A. Henry, M. |
spellingShingle |
Eynaud, F. Turon, J. L. Matthiessen, J. Kissel, C. Peypouquet, J. P. de Vernal, A. Henry, M. Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts |
author_facet |
Eynaud, F. Turon, J. L. Matthiessen, J. Kissel, C. Peypouquet, J. P. de Vernal, A. Henry, M. |
author_sort |
Eynaud, F. |
title |
Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts |
title_short |
Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts |
title_full |
Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts |
title_fullStr |
Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts |
title_full_unstemmed |
Norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts |
title_sort |
norwegian sea‐surface palaeoenvironments of marine oxygen‐isotope stage 3: the paradoxical response of dinoflagellate cysts |
publisher |
Wiley |
publishDate |
2002 |
url |
http://dx.doi.org/10.1002/jqs.676 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.676 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.676 |
geographic |
Greenland Norwegian Sea |
geographic_facet |
Greenland Norwegian Sea |
genre |
Greenland Greenland ice core ice core North Atlantic North Atlantic oscillation Norwegian Sea Sea ice |
genre_facet |
Greenland Greenland ice core ice core North Atlantic North Atlantic oscillation Norwegian Sea Sea ice |
op_source |
Journal of Quaternary Science volume 17, issue 4, page 349-359 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.676 |
container_title |
Journal of Quaternary Science |
container_volume |
17 |
container_issue |
4 |
container_start_page |
349 |
op_container_end_page |
359 |
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1800752340118011904 |