Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts
The last glacial period, showing the progressive development of large boreal ice sheets, was punctuated by large climatic excursions. These excursions were triggered mainly by atmosphere–ocean–ice coupled dynamics and are thus exemplary case studies of natural climate variability. To characterize th...
Published in: | Journal of Quaternary Science |
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Language: | English |
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Online Access: | http://okina.univ-angers.fr/publications/ua3829 https://doi.org/10.1002/jqs.2601 |
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ftunivangokina:oai:okina.univ-angers.fr:3829 2023-05-15T16:41:11+02:00 Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts C. Caulle A. Penaud F. Eynaud S. Zaragosi D.M. Roche E. Michel S. Boulay T. Richter 2013 http://okina.univ-angers.fr/publications/ua3829 https://doi.org/10.1002/jqs.2601 eng eng Wiley Journal of Quaternary Science dinoflagellate cysts European ice sheets Faeroe Margin Last Glacial Maximum sea-surface parameters Article scientifique dans une revue à comité de lecture 2013 ftunivangokina https://doi.org/10.1002/jqs.2601 2017-04-13T17:48:58Z The last glacial period, showing the progressive development of large boreal ice sheets, was punctuated by large climatic excursions. These excursions were triggered mainly by atmosphere–ocean–ice coupled dynamics and are thus exemplary case studies of natural climate variability. To characterize the sea-surface palaeohydrographical changes accompanying these oscillations along the European margin, we have integrated new palynological data (dinocysts) acquired on core MD99-2281 (60°N, Faeroe Margin) during Marine Isotope Stage 2 in a latitudinal transect including published cores MD95-2002 (47°N, Celtic Margin) and MD95-2010 (66°N, Vöring Plateau). This transect is superimposed on the modern North Atlantic Drift pathway, but also at the outskirts of glacial European ice sheets, thus ideally located to track sea-ice extent and ice-sheet instabilities through time. The results show a coherent and sensitive response of sea-surface environments to the complex chain of abrupt events that punctuated the end of the last glacial period. The Last Glacial Maximum was marked by large seasonal contrasts of temperatures, whereas Heinrich events (HE) were characterized by a sharp cooling and sea-ice development. A tripartite structure is identified within HE1, with indices of melting at 19k cal a BP, followed by a temperate phase synchronous of a relative stability of ice sheets, and a terminal phase (17.5–15k cal a BP) characteristic of the ‘conventional Laurentian’ HE1. Copyright Article in Journal/Newspaper Ice Sheet North Atlantic Sea ice Université Angers: Okina (Open Knowledge, INformation, Access) Vöring Plateau ENVELOPE(3.250,3.250,67.333,67.333) Journal of Quaternary Science 28 3 217 228 |
institution |
Open Polar |
collection |
Université Angers: Okina (Open Knowledge, INformation, Access) |
op_collection_id |
ftunivangokina |
language |
English |
topic |
dinoflagellate cysts European ice sheets Faeroe Margin Last Glacial Maximum sea-surface parameters |
spellingShingle |
dinoflagellate cysts European ice sheets Faeroe Margin Last Glacial Maximum sea-surface parameters C. Caulle A. Penaud F. Eynaud S. Zaragosi D.M. Roche E. Michel S. Boulay T. Richter Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts |
topic_facet |
dinoflagellate cysts European ice sheets Faeroe Margin Last Glacial Maximum sea-surface parameters |
description |
The last glacial period, showing the progressive development of large boreal ice sheets, was punctuated by large climatic excursions. These excursions were triggered mainly by atmosphere–ocean–ice coupled dynamics and are thus exemplary case studies of natural climate variability. To characterize the sea-surface palaeohydrographical changes accompanying these oscillations along the European margin, we have integrated new palynological data (dinocysts) acquired on core MD99-2281 (60°N, Faeroe Margin) during Marine Isotope Stage 2 in a latitudinal transect including published cores MD95-2002 (47°N, Celtic Margin) and MD95-2010 (66°N, Vöring Plateau). This transect is superimposed on the modern North Atlantic Drift pathway, but also at the outskirts of glacial European ice sheets, thus ideally located to track sea-ice extent and ice-sheet instabilities through time. The results show a coherent and sensitive response of sea-surface environments to the complex chain of abrupt events that punctuated the end of the last glacial period. The Last Glacial Maximum was marked by large seasonal contrasts of temperatures, whereas Heinrich events (HE) were characterized by a sharp cooling and sea-ice development. A tripartite structure is identified within HE1, with indices of melting at 19k cal a BP, followed by a temperate phase synchronous of a relative stability of ice sheets, and a terminal phase (17.5–15k cal a BP) characteristic of the ‘conventional Laurentian’ HE1. Copyright |
format |
Article in Journal/Newspaper |
author |
C. Caulle A. Penaud F. Eynaud S. Zaragosi D.M. Roche E. Michel S. Boulay T. Richter |
author_facet |
C. Caulle A. Penaud F. Eynaud S. Zaragosi D.M. Roche E. Michel S. Boulay T. Richter |
author_sort |
C. Caulle |
title |
Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts |
title_short |
Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts |
title_full |
Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts |
title_fullStr |
Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts |
title_full_unstemmed |
Sea-surface hydrographical conditions off South Faeroes and within the North-Eastern North Atlantic through MIS 2: the response of dinocysts |
title_sort |
sea-surface hydrographical conditions off south faeroes and within the north-eastern north atlantic through mis 2: the response of dinocysts |
publisher |
Wiley |
publishDate |
2013 |
url |
http://okina.univ-angers.fr/publications/ua3829 https://doi.org/10.1002/jqs.2601 |
long_lat |
ENVELOPE(3.250,3.250,67.333,67.333) |
geographic |
Vöring Plateau |
geographic_facet |
Vöring Plateau |
genre |
Ice Sheet North Atlantic Sea ice |
genre_facet |
Ice Sheet North Atlantic Sea ice |
op_source |
Journal of Quaternary Science |
op_doi |
https://doi.org/10.1002/jqs.2601 |
container_title |
Journal of Quaternary Science |
container_volume |
28 |
container_issue |
3 |
container_start_page |
217 |
op_container_end_page |
228 |
_version_ |
1766031613204889600 |