Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka
This paper documents the migration of the Polar Front (PF) over the Iberian margin during some of the cold climatic extremes of the last 45 ka. It is based on a compilation of robust and coherent paleohydrological proxies obtained from eleven cores distributed between 36 and 42°N. Planktonic δ18O (G...
Published in: | Geochemistry, Geophysics, Geosystems |
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Language: | English |
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AGU (American Geophysical Union)
2009
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Online Access: | https://oceanrep.geomar.de/id/eprint/3176/ https://oceanrep.geomar.de/id/eprint/3176/1/643_Eynaud_2009_PositionOfThePolarFront_Artzeit_pubid11992.pdf https://doi.org/10.1029/2009GC002398 |
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ftoceanrep:oai:oceanrep.geomar.de:3176 2024-09-30T14:38:41+00:00 Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka Eynaud, Frédérique De Abreu, Lúcia Voelker, Antje Schönfeld, Joachim Salgueiro, Emilia Turon, Jean-Louis Penaud, Aurélie Toucanne, Samuel Naughton, Filipa Sánchez Goni, Maria Fernanda Malaizé, Bruno Cacho, Isabel 2009 text https://oceanrep.geomar.de/id/eprint/3176/ https://oceanrep.geomar.de/id/eprint/3176/1/643_Eynaud_2009_PositionOfThePolarFront_Artzeit_pubid11992.pdf https://doi.org/10.1029/2009GC002398 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/3176/1/643_Eynaud_2009_PositionOfThePolarFront_Artzeit_pubid11992.pdf Eynaud, F., De Abreu, L., Voelker, A., Schönfeld, J., Salgueiro, E., Turon, J. L., Penaud, A., Toucanne, S., Naughton, F., Sánchez Goni, M. F., Malaizé, B. and Cacho, I. (2009) Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka. Open Access Geochemistry, Geophysics, Geosystems, 10 (Q07U05). DOI 10.1029/2009GC002398 <https://doi.org/10.1029/2009GC002398>. doi:10.1029/2009GC002398 info:eu-repo/semantics/openAccess Article PeerReviewed 2009 ftoceanrep https://doi.org/10.1029/2009GC002398 2024-09-04T05:04:40Z This paper documents the migration of the Polar Front (PF) over the Iberian margin during some of the cold climatic extremes of the last 45 ka. It is based on a compilation of robust and coherent paleohydrological proxies obtained from eleven cores distributed between 36 and 42°N. Planktonic δ18O (Globigerina bulloides), ice-rafted detritus concentrations, and the relative abundance of the polar foraminifera Neogloboquadrina pachyderma sinistral were used to track the PF position. These three data sets, compared from core to core, show a consistent evolution of the sea surface paleohydrology along the Iberian margin over the last 45 ka. We focused on five time slices representative of cold periods under distinct paleoenvironmental forcings: the 8.2 ka event and the Younger Dryas (two recent cold events occurring within high values of summer insolation), Heinrich events 1 and 4 (reflecting major episodes of massive iceberg discharges into the North Atlantic), and the Last Glacial Maximum (typifying the highest ice volume accumulated in the Northern Hemisphere). For each event, we generated schematic maps mirroring past sea surface hydrological conditions. The maps revealed that the Polar Front presence along the Iberian margin was restricted to Heinrich events. The sea surface conditions during the Last Glacial Maximum were close to those at present day, except for the northern sites which briefly experienced subarctic conditions. Article in Journal/Newspaper Neogloboquadrina pachyderma North Atlantic Subarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geochemistry, Geophysics, Geosystems 10 7 n/a n/a |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
This paper documents the migration of the Polar Front (PF) over the Iberian margin during some of the cold climatic extremes of the last 45 ka. It is based on a compilation of robust and coherent paleohydrological proxies obtained from eleven cores distributed between 36 and 42°N. Planktonic δ18O (Globigerina bulloides), ice-rafted detritus concentrations, and the relative abundance of the polar foraminifera Neogloboquadrina pachyderma sinistral were used to track the PF position. These three data sets, compared from core to core, show a consistent evolution of the sea surface paleohydrology along the Iberian margin over the last 45 ka. We focused on five time slices representative of cold periods under distinct paleoenvironmental forcings: the 8.2 ka event and the Younger Dryas (two recent cold events occurring within high values of summer insolation), Heinrich events 1 and 4 (reflecting major episodes of massive iceberg discharges into the North Atlantic), and the Last Glacial Maximum (typifying the highest ice volume accumulated in the Northern Hemisphere). For each event, we generated schematic maps mirroring past sea surface hydrological conditions. The maps revealed that the Polar Front presence along the Iberian margin was restricted to Heinrich events. The sea surface conditions during the Last Glacial Maximum were close to those at present day, except for the northern sites which briefly experienced subarctic conditions. |
format |
Article in Journal/Newspaper |
author |
Eynaud, Frédérique De Abreu, Lúcia Voelker, Antje Schönfeld, Joachim Salgueiro, Emilia Turon, Jean-Louis Penaud, Aurélie Toucanne, Samuel Naughton, Filipa Sánchez Goni, Maria Fernanda Malaizé, Bruno Cacho, Isabel |
spellingShingle |
Eynaud, Frédérique De Abreu, Lúcia Voelker, Antje Schönfeld, Joachim Salgueiro, Emilia Turon, Jean-Louis Penaud, Aurélie Toucanne, Samuel Naughton, Filipa Sánchez Goni, Maria Fernanda Malaizé, Bruno Cacho, Isabel Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka |
author_facet |
Eynaud, Frédérique De Abreu, Lúcia Voelker, Antje Schönfeld, Joachim Salgueiro, Emilia Turon, Jean-Louis Penaud, Aurélie Toucanne, Samuel Naughton, Filipa Sánchez Goni, Maria Fernanda Malaizé, Bruno Cacho, Isabel |
author_sort |
Eynaud, Frédérique |
title |
Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka |
title_short |
Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka |
title_full |
Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka |
title_fullStr |
Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka |
title_full_unstemmed |
Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka |
title_sort |
position of the polar front along the western iberian margin during key cold episodes of the last 45 ka |
publisher |
AGU (American Geophysical Union) |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/3176/ https://oceanrep.geomar.de/id/eprint/3176/1/643_Eynaud_2009_PositionOfThePolarFront_Artzeit_pubid11992.pdf https://doi.org/10.1029/2009GC002398 |
genre |
Neogloboquadrina pachyderma North Atlantic Subarctic |
genre_facet |
Neogloboquadrina pachyderma North Atlantic Subarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/3176/1/643_Eynaud_2009_PositionOfThePolarFront_Artzeit_pubid11992.pdf Eynaud, F., De Abreu, L., Voelker, A., Schönfeld, J., Salgueiro, E., Turon, J. L., Penaud, A., Toucanne, S., Naughton, F., Sánchez Goni, M. F., Malaizé, B. and Cacho, I. (2009) Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka. Open Access Geochemistry, Geophysics, Geosystems, 10 (Q07U05). DOI 10.1029/2009GC002398 <https://doi.org/10.1029/2009GC002398>. doi:10.1029/2009GC002398 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2009GC002398 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
10 |
container_issue |
7 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1811641335276371968 |