Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene
To assess the regional multi-decadal to multicentennial climate variability along the southern Iberian Peninsula during the mid- to late-Holocene record of paleoenvironmental indicators from marine sediments were established for two sites in the Alboran Sea (ODP-161-976A) and the Gulf of Cadiz (GeoB...
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/12474 2023-05-15T17:31:41+02:00 Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene Schirrmacher, Julien Weinelt, Mara Blanz, Thomas Andersen, Nils Salgueiro, Emilia Schneider, Ralph R. 2019 http://hdl.handle.net/10400.1/12474 https://doi.org/10.5194/cp-15-617-2019 eng eng Copernicus Publications info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F26525%2F2006/PT 1814-9324 http://hdl.handle.net/10400.1/12474 doi:10.5194/cp-15-617-2019 openAccess http://creativecommons.org/licenses/by/4.0/ CC-BY article 2019 ftunivalgarve https://doi.org/10.5194/cp-15-617-2019 2022-05-30T08:48:38Z To assess the regional multi-decadal to multicentennial climate variability along the southern Iberian Peninsula during the mid- to late-Holocene record of paleoenvironmental indicators from marine sediments were established for two sites in the Alboran Sea (ODP-161-976A) and the Gulf of Cadiz (GeoB5901-2). High-resolution records of organic geochemical properties and planktic foraminiferal assemblages are used to decipher precipitation and vegetation changes as well as hydrological conditions with respect to sea surface temperature (SST) and marine primary productivity (MPP). As a proxy for precipitation change, records of plant-derived n-alkane composition suggest a series of five distinct dry episodes in southern Iberia at 5.4 +/- 0.3 ka cal BP, from 5.1 to 4.9 +/- 0.1 ka cal BP, from 4.8 to 4.7 +/- 0.1 ka cal BP, from 4.4 to 4.3 +/- 0.1 ka cal BP, and at 3.7 +/- 0.1 ka cal BP. During each dry episode the vegetation suffered from reduced water availability. Interestingly, the dry phase from 4.4 to 4.3 +/- 0.1 ka cal BP is followed by a rapid shift towards wetter conditions revealing a more complex pattern in terms of its timing and duration than was described for the 4.2 ka event in other regions. The series of dry episodes as well as closely connected hydrological variability in the Alboran Sea were probably driven by NAO-like (North Atlantic Oscillation) variability. In contrast, surface waters in the Gulf of Cadiz appear to have responded more directly to North Atlantic cooling associated with Bond events. In particular, during Bond events 3 and 4, a pronounced increase in seasonality with summer warming and winter cooling is found. DFG (German Research Foundation) CRC 1266 2901391021 Fundacao para a Ciencia e Tecnologia SFRH/BPD/111433/2015 info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper North Atlantic North Atlantic oscillation Universidade do Algarve: Sapienta Climate of the Past 15 2 617 634 |
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Open Polar |
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Universidade do Algarve: Sapienta |
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ftunivalgarve |
language |
English |
description |
To assess the regional multi-decadal to multicentennial climate variability along the southern Iberian Peninsula during the mid- to late-Holocene record of paleoenvironmental indicators from marine sediments were established for two sites in the Alboran Sea (ODP-161-976A) and the Gulf of Cadiz (GeoB5901-2). High-resolution records of organic geochemical properties and planktic foraminiferal assemblages are used to decipher precipitation and vegetation changes as well as hydrological conditions with respect to sea surface temperature (SST) and marine primary productivity (MPP). As a proxy for precipitation change, records of plant-derived n-alkane composition suggest a series of five distinct dry episodes in southern Iberia at 5.4 +/- 0.3 ka cal BP, from 5.1 to 4.9 +/- 0.1 ka cal BP, from 4.8 to 4.7 +/- 0.1 ka cal BP, from 4.4 to 4.3 +/- 0.1 ka cal BP, and at 3.7 +/- 0.1 ka cal BP. During each dry episode the vegetation suffered from reduced water availability. Interestingly, the dry phase from 4.4 to 4.3 +/- 0.1 ka cal BP is followed by a rapid shift towards wetter conditions revealing a more complex pattern in terms of its timing and duration than was described for the 4.2 ka event in other regions. The series of dry episodes as well as closely connected hydrological variability in the Alboran Sea were probably driven by NAO-like (North Atlantic Oscillation) variability. In contrast, surface waters in the Gulf of Cadiz appear to have responded more directly to North Atlantic cooling associated with Bond events. In particular, during Bond events 3 and 4, a pronounced increase in seasonality with summer warming and winter cooling is found. DFG (German Research Foundation) CRC 1266 2901391021 Fundacao para a Ciencia e Tecnologia SFRH/BPD/111433/2015 info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Schirrmacher, Julien Weinelt, Mara Blanz, Thomas Andersen, Nils Salgueiro, Emilia Schneider, Ralph R. |
spellingShingle |
Schirrmacher, Julien Weinelt, Mara Blanz, Thomas Andersen, Nils Salgueiro, Emilia Schneider, Ralph R. Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene |
author_facet |
Schirrmacher, Julien Weinelt, Mara Blanz, Thomas Andersen, Nils Salgueiro, Emilia Schneider, Ralph R. |
author_sort |
Schirrmacher, Julien |
title |
Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene |
title_short |
Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene |
title_full |
Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene |
title_fullStr |
Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene |
title_full_unstemmed |
Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene |
title_sort |
multi-decadal atmospheric and marine climate variability in southern iberia during the mid- to late-holocene |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
http://hdl.handle.net/10400.1/12474 https://doi.org/10.5194/cp-15-617-2019 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F26525%2F2006/PT 1814-9324 http://hdl.handle.net/10400.1/12474 doi:10.5194/cp-15-617-2019 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-15-617-2019 |
container_title |
Climate of the Past |
container_volume |
15 |
container_issue |
2 |
container_start_page |
617 |
op_container_end_page |
634 |
_version_ |
1766129382949126144 |