A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record
A high-resolution study of the MIS 12/MIS 11 transition and the MIS 11 (430-376 kyr) coccolithophore assemblages at Ocean Drilling Program Site 977 was conducted to reconstruct the palaeoceanographic and climatic changes in the Alboran Sea from the variability in surface water conditions. The nannof...
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2020
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Online Access: | http://hdl.handle.net/10400.1/14830 https://doi.org/10.1016/j.quascirev.2020.106520 |
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/14830 2023-05-15T17:32:39+02:00 A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record González-Lanchas, Alba Flores, José-Abel Sierro, Francisco J. Bárcena, María Ángeles Rigual-Hernández, Andrés S. Oliveira, Dulce Azibeiro, Lucía A. Marino, Maria Maiorano, Patrizia Cortina, Aleix Cacho, Isabel Grimalt, Joan O. 2020 http://hdl.handle.net/10400.1/14830 https://doi.org/10.1016/j.quascirev.2020.106520 eng eng Elsevier 0277-3791 http://hdl.handle.net/10400.1/14830 doi:10.1016/j.quascirev.2020.106520 openAccess Palaeoceanography Interglacial Marine isotope stage 11 Alboran sea Western europe Micropaleontology Coccolithophore article 2020 ftunivalgarve https://doi.org/10.1016/j.quascirev.2020.106520 2022-10-05T00:01:32Z A high-resolution study of the MIS 12/MIS 11 transition and the MIS 11 (430-376 kyr) coccolithophore assemblages at Ocean Drilling Program Site 977 was conducted to reconstruct the palaeoceanographic and climatic changes in the Alboran Sea from the variability in surface water conditions. The nannofossil record was integrated with the planktonic oxygen and carbon stable isotopes, as well as the U-37(k') Sea Surface Temperature (SST) at the studied site during the investigated interval. The coccolithophore primary productivity, reconstructed from the PPP (primary productivity proxy = absolute values of Gephyrocapsa caribbeanica + small Gephyrocapsa group) revealed pronounced fluctuations, that were strongly associated with variations in the intensity of the regional Alboran Upwelling System. The comparison of the nannoplankton record with opal phytolith content for the studied site and the already available pollen record at the nearby Integrated Ocean Drilling Program Site U1385, suggests an association of the upwelling dynamics with the variability of the North Atlantic Oscillation-like (NAO-like) phase. High PPP during positive (+) NAO-like phases is the result of intensified upwelling, owing to the complete development of the surface hydrological structures at the Alboran Sea. This scenario was identified during the MIS 12/MIS 11 transition (428-422 kyr), the late MIS 11c (405-397 kyr), and MIS11 b to MIS 11a (397-376 kyr). Two short-term minima in the PPP and SST were observed during MIS 11 b and were coeval with the North Atlantic Heinrich-type (Ht) events Ht3 (similar to 390 kyr) and Ht2 (similar to 384 kyr). Increased abundance of the subpolar Coccolithus pelagicus subsp. pelagicus and Gephyrocapsa muellerae was consistent with the inflow of cold surface waters into the Mediterranean Sea during the Ht events. Lowered PPP during negative (-) NAO-like phases is the result of moderate upwelling by the incomplete development of surface hydrological structures at the Alboran Sea. This scenario is expressed ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Universidade do Algarve: Sapienta Quaternary Science Reviews 245 106520 |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Palaeoceanography Interglacial Marine isotope stage 11 Alboran sea Western europe Micropaleontology Coccolithophore |
spellingShingle |
Palaeoceanography Interglacial Marine isotope stage 11 Alboran sea Western europe Micropaleontology Coccolithophore González-Lanchas, Alba Flores, José-Abel Sierro, Francisco J. Bárcena, María Ángeles Rigual-Hernández, Andrés S. Oliveira, Dulce Azibeiro, Lucía A. Marino, Maria Maiorano, Patrizia Cortina, Aleix Cacho, Isabel Grimalt, Joan O. A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record |
topic_facet |
Palaeoceanography Interglacial Marine isotope stage 11 Alboran sea Western europe Micropaleontology Coccolithophore |
description |
A high-resolution study of the MIS 12/MIS 11 transition and the MIS 11 (430-376 kyr) coccolithophore assemblages at Ocean Drilling Program Site 977 was conducted to reconstruct the palaeoceanographic and climatic changes in the Alboran Sea from the variability in surface water conditions. The nannofossil record was integrated with the planktonic oxygen and carbon stable isotopes, as well as the U-37(k') Sea Surface Temperature (SST) at the studied site during the investigated interval. The coccolithophore primary productivity, reconstructed from the PPP (primary productivity proxy = absolute values of Gephyrocapsa caribbeanica + small Gephyrocapsa group) revealed pronounced fluctuations, that were strongly associated with variations in the intensity of the regional Alboran Upwelling System. The comparison of the nannoplankton record with opal phytolith content for the studied site and the already available pollen record at the nearby Integrated Ocean Drilling Program Site U1385, suggests an association of the upwelling dynamics with the variability of the North Atlantic Oscillation-like (NAO-like) phase. High PPP during positive (+) NAO-like phases is the result of intensified upwelling, owing to the complete development of the surface hydrological structures at the Alboran Sea. This scenario was identified during the MIS 12/MIS 11 transition (428-422 kyr), the late MIS 11c (405-397 kyr), and MIS11 b to MIS 11a (397-376 kyr). Two short-term minima in the PPP and SST were observed during MIS 11 b and were coeval with the North Atlantic Heinrich-type (Ht) events Ht3 (similar to 390 kyr) and Ht2 (similar to 384 kyr). Increased abundance of the subpolar Coccolithus pelagicus subsp. pelagicus and Gephyrocapsa muellerae was consistent with the inflow of cold surface waters into the Mediterranean Sea during the Ht events. Lowered PPP during negative (-) NAO-like phases is the result of moderate upwelling by the incomplete development of surface hydrological structures at the Alboran Sea. This scenario is expressed ... |
format |
Article in Journal/Newspaper |
author |
González-Lanchas, Alba Flores, José-Abel Sierro, Francisco J. Bárcena, María Ángeles Rigual-Hernández, Andrés S. Oliveira, Dulce Azibeiro, Lucía A. Marino, Maria Maiorano, Patrizia Cortina, Aleix Cacho, Isabel Grimalt, Joan O. |
author_facet |
González-Lanchas, Alba Flores, José-Abel Sierro, Francisco J. Bárcena, María Ángeles Rigual-Hernández, Andrés S. Oliveira, Dulce Azibeiro, Lucía A. Marino, Maria Maiorano, Patrizia Cortina, Aleix Cacho, Isabel Grimalt, Joan O. |
author_sort |
González-Lanchas, Alba |
title |
A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record |
title_short |
A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record |
title_full |
A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record |
title_fullStr |
A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record |
title_full_unstemmed |
A new perspective of the Alboran Upwelling System reconstruction during the Marine Isotope Stage 11: a high-resolution coccolithophore record |
title_sort |
new perspective of the alboran upwelling system reconstruction during the marine isotope stage 11: a high-resolution coccolithophore record |
publisher |
Elsevier |
publishDate |
2020 |
url |
http://hdl.handle.net/10400.1/14830 https://doi.org/10.1016/j.quascirev.2020.106520 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
0277-3791 http://hdl.handle.net/10400.1/14830 doi:10.1016/j.quascirev.2020.106520 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2020.106520 |
container_title |
Quaternary Science Reviews |
container_volume |
245 |
container_start_page |
106520 |
_version_ |
1766130861069041664 |