Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe
Paleoclimate reconstructions suggest that the complex variability within the Greenland stadial 1 (GS-1) over western Europe was governed by coupled ocean and atmospheric changes. However, few works from the North Atlantic mid-latitudes document both the GS-1 onset and its termination, which are ofte...
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Online Access: | https://oskar-bordeaux.fr/handle/20.500.12278/200299 https://hdl.handle.net/20.500.12278/200299 https://doi.org/10.1016/j.quascirev.2019.03.033 |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/200299 2024-06-23T07:53:19+00:00 Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe Quat. sci. rev. NAUGHTON, F. COSTAS, S. GOMES, S. D. DESPRAT, Stephanie RODRIGUES, T. SANCHEZ GONI, Maria RENSSEN, H. TRIGO, R. BRONK-RAMSEY, C. OLIVEIRA, D. SALGUEIRO, E. VOELKER, A. H. L. ABRANTES, F. 2019-05-01 https://oskar-bordeaux.fr/handle/20.500.12278/200299 https://hdl.handle.net/20.500.12278/200299 https://doi.org/10.1016/j.quascirev.2019.03.033 EN eng 0277-3791 oai:crossref.org:10.1016/j.quascirev.2019.03.033 https://oskar-bordeaux.fr/handle/20.500.12278/200299 doi:10.1016/j.quascirev.2019.03.033 open Pas de Licence CC crossref Sciences de l'environnement Article de revue 2019 ftoskarbordeaux https://doi.org/20.500.12278/20029910.1016/j.quascirev.2019.03.033 2024-06-10T14:02:26Z Paleoclimate reconstructions suggest that the complex variability within the Greenland stadial 1 (GS-1) over western Europe was governed by coupled ocean and atmospheric changes. However, few works from the North Atlantic mid-latitudes document both the GS-1 onset and its termination, which are often considered as single abrupt transition events. Here, we present a direct comparison between marine (alkenone-based sea surface temperatures) and terrestrial (pollen) data, at very high resolution (28 years mean), from the southwestern Iberian shelf record D13882. Our results reveal a rather complex climatic period with internally changing conditions. The GS-1 onset (GS-1a: 12890-12720 yr BP) is marked by a progressive cooling and drying; GS-1b (12720-12390 yr BP) is the coldest and driest phase; GS-1c (12390-12030 yr BP) is marked by a progressive warming and increase in moisture conditions; GS-1 termination (GS-1d: 12030-11770 yr BP) is marked by rapid switches between cool wet, cold dry and cool wet conditions. Although hydroclimate response was very unsteady throughout the GS-1 and in particular during its termination phase, the persistence of an open temperate and Mediterranean forest in southwestern Iberia during the entire episode suggests that at least some moisture was delivered via the Westerlies. We propose coupled ocean and atmospheric mechanisms to reproduce these scenaria. Changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) as well as variations in the North Atlantic sea-ice growth have favoured the displacement of the polar jet stream's latitudinal position and contributed to a complex spatial pattern and strength of the Westerlies across western Europe. Article in Journal/Newspaper Greenland North Atlantic Sea ice OSKAR Bordeaux (Open Science Knowledge ARchive) Greenland Quaternary Science Reviews 212 108 120 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Sciences de l'environnement |
spellingShingle |
Sciences de l'environnement NAUGHTON, F. COSTAS, S. GOMES, S. D. DESPRAT, Stephanie RODRIGUES, T. SANCHEZ GONI, Maria RENSSEN, H. TRIGO, R. BRONK-RAMSEY, C. OLIVEIRA, D. SALGUEIRO, E. VOELKER, A. H. L. ABRANTES, F. Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe |
topic_facet |
Sciences de l'environnement |
description |
Paleoclimate reconstructions suggest that the complex variability within the Greenland stadial 1 (GS-1) over western Europe was governed by coupled ocean and atmospheric changes. However, few works from the North Atlantic mid-latitudes document both the GS-1 onset and its termination, which are often considered as single abrupt transition events. Here, we present a direct comparison between marine (alkenone-based sea surface temperatures) and terrestrial (pollen) data, at very high resolution (28 years mean), from the southwestern Iberian shelf record D13882. Our results reveal a rather complex climatic period with internally changing conditions. The GS-1 onset (GS-1a: 12890-12720 yr BP) is marked by a progressive cooling and drying; GS-1b (12720-12390 yr BP) is the coldest and driest phase; GS-1c (12390-12030 yr BP) is marked by a progressive warming and increase in moisture conditions; GS-1 termination (GS-1d: 12030-11770 yr BP) is marked by rapid switches between cool wet, cold dry and cool wet conditions. Although hydroclimate response was very unsteady throughout the GS-1 and in particular during its termination phase, the persistence of an open temperate and Mediterranean forest in southwestern Iberia during the entire episode suggests that at least some moisture was delivered via the Westerlies. We propose coupled ocean and atmospheric mechanisms to reproduce these scenaria. Changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) as well as variations in the North Atlantic sea-ice growth have favoured the displacement of the polar jet stream's latitudinal position and contributed to a complex spatial pattern and strength of the Westerlies across western Europe. |
format |
Article in Journal/Newspaper |
author |
NAUGHTON, F. COSTAS, S. GOMES, S. D. DESPRAT, Stephanie RODRIGUES, T. SANCHEZ GONI, Maria RENSSEN, H. TRIGO, R. BRONK-RAMSEY, C. OLIVEIRA, D. SALGUEIRO, E. VOELKER, A. H. L. ABRANTES, F. |
author_facet |
NAUGHTON, F. COSTAS, S. GOMES, S. D. DESPRAT, Stephanie RODRIGUES, T. SANCHEZ GONI, Maria RENSSEN, H. TRIGO, R. BRONK-RAMSEY, C. OLIVEIRA, D. SALGUEIRO, E. VOELKER, A. H. L. ABRANTES, F. |
author_sort |
NAUGHTON, F. |
title |
Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe |
title_short |
Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe |
title_full |
Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe |
title_fullStr |
Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe |
title_full_unstemmed |
Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe |
title_sort |
coupled ocean and atmospheric changes during greenland stadial 1 in southwestern europe |
publishDate |
2019 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/200299 https://hdl.handle.net/20.500.12278/200299 https://doi.org/10.1016/j.quascirev.2019.03.033 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic Sea ice |
genre_facet |
Greenland North Atlantic Sea ice |
op_source |
crossref |
op_relation |
0277-3791 oai:crossref.org:10.1016/j.quascirev.2019.03.033 https://oskar-bordeaux.fr/handle/20.500.12278/200299 doi:10.1016/j.quascirev.2019.03.033 |
op_rights |
open Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/20029910.1016/j.quascirev.2019.03.033 |
container_title |
Quaternary Science Reviews |
container_volume |
212 |
container_start_page |
108 |
op_container_end_page |
120 |
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1802644902810484736 |