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...
Published in: | Quaternary Science Reviews |
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Language: | English |
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2019
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Online Access: | http://hdl.handle.net/10400.1/14344 https://doi.org/10.1016/j.quascirev.2019.03.033 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/14344 2023-05-15T16:29:00+02:00 Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe Naughton, F. Costas, S. Comes, S. D. Desprat, S. Rodrigues, Teresa Goni, M. F. Sanchez Renssen, H. Trigo, R. Bronk-Ramsey, C. Oliveira, Dulce Salgueiro, Emilia Voelker, Antje H L Abrantes, Fatima 2019-05 http://hdl.handle.net/10400.1/14344 https://doi.org/10.1016/j.quascirev.2019.03.033 eng eng Pergamon-Elsevier Science Ltd info:eu-repo/grantAgreement/FCT/5876-PPCDTI/100157/PT 0277-3791 1096-0813 http://hdl.handle.net/10400.1/14344 doi:10.1016/j.quascirev.2019.03.033 restrictedAccess Abrupt climate-change Last glacial maximum Atlantic meridional circulation Younger dryas climate Surface-temperature Heinrich events Weather types Lake Agassiz Sw Europe Variability article 2019 ftunivalgarve https://doi.org/10.1016/j.quascirev.2019.03.033 2022-05-30T08:49:14Z 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 scenario. 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. (C) 2019 Elsevier Ltd. All rights reserved. FCT - Foundation for Science and TechnologyPortuguese Foundation for Science and Technology [PTDC/AAC-CLI/100157/2008, IF/01489/2015, UID/multi/04326/2016, SAICT-45-2017-02, WARM WORLDS: 29897, HOLMODRIVE: 29029] CCMAR BCC grant [Incentivo/MAR/LA00015/2014] IF grant ... Article in Journal/Newspaper Greenland North Atlantic Sea ice Universidade do Algarve: Sapienta Greenland Quaternary Science Reviews 212 108 120 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Abrupt climate-change Last glacial maximum Atlantic meridional circulation Younger dryas climate Surface-temperature Heinrich events Weather types Lake Agassiz Sw Europe Variability |
spellingShingle |
Abrupt climate-change Last glacial maximum Atlantic meridional circulation Younger dryas climate Surface-temperature Heinrich events Weather types Lake Agassiz Sw Europe Variability Naughton, F. Costas, S. Comes, S. D. Desprat, S. Rodrigues, Teresa Goni, M. F. Sanchez Renssen, H. Trigo, R. Bronk-Ramsey, C. Oliveira, Dulce Salgueiro, Emilia Voelker, Antje H L Abrantes, Fatima Coupled ocean and atmospheric changes during Greenland stadial 1 in southwestern Europe |
topic_facet |
Abrupt climate-change Last glacial maximum Atlantic meridional circulation Younger dryas climate Surface-temperature Heinrich events Weather types Lake Agassiz Sw Europe Variability |
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 scenario. 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. (C) 2019 Elsevier Ltd. All rights reserved. FCT - Foundation for Science and TechnologyPortuguese Foundation for Science and Technology [PTDC/AAC-CLI/100157/2008, IF/01489/2015, UID/multi/04326/2016, SAICT-45-2017-02, WARM WORLDS: 29897, HOLMODRIVE: 29029] CCMAR BCC grant [Incentivo/MAR/LA00015/2014] IF grant ... |
format |
Article in Journal/Newspaper |
author |
Naughton, F. Costas, S. Comes, S. D. Desprat, S. Rodrigues, Teresa Goni, M. F. Sanchez Renssen, H. Trigo, R. Bronk-Ramsey, C. Oliveira, Dulce Salgueiro, Emilia Voelker, Antje H L Abrantes, Fatima |
author_facet |
Naughton, F. Costas, S. Comes, S. D. Desprat, S. Rodrigues, Teresa Goni, M. F. Sanchez Renssen, H. Trigo, R. Bronk-Ramsey, C. Oliveira, Dulce Salgueiro, Emilia Voelker, Antje H L Abrantes, Fatima |
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 |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2019 |
url |
http://hdl.handle.net/10400.1/14344 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_relation |
info:eu-repo/grantAgreement/FCT/5876-PPCDTI/100157/PT 0277-3791 1096-0813 http://hdl.handle.net/10400.1/14344 doi:10.1016/j.quascirev.2019.03.033 |
op_rights |
restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2019.03.033 |
container_title |
Quaternary Science Reviews |
container_volume |
212 |
container_start_page |
108 |
op_container_end_page |
120 |
_version_ |
1766018684841623552 |