Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene
<p>To assess the regional multi-decadal to multi-centennial climate variability along the southern Iberian Peninsula during the mid- to late-Holocene record of paleo-environmental indicators from marine sediments were established for two sites in the Alboran Sea (ODP-161-976A) and the Gulf of...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-04-01
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| Series: | Climate of the Past |
| Online Access: | https://www.clim-past.net/15/617/2019/cp-15-617-2019.pdf |
| _version_ | 1818454023475298304 |
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| author | J. Schirrmacher J. Schirrmacher M. Weinelt T. Blanz N. Andersen E. Salgueiro E. Salgueiro R. R. Schneider R. R. Schneider R. R. Schneider |
| author_facet | J. Schirrmacher J. Schirrmacher M. Weinelt T. Blanz N. Andersen E. Salgueiro E. Salgueiro R. R. Schneider R. R. Schneider R. R. Schneider |
| author_sort | J. Schirrmacher |
| collection | DOAJ |
| description | <p>To assess the regional multi-decadal to multi-centennial climate variability along the
southern Iberian Peninsula during the mid- to late-Holocene record of paleo-environmental
indicators from marine sediments were established for two sites in the Alboran Sea
(ODP-161-976A) and the Gulf of Cádiz (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 <span class="inline-formula"><i>n</i></span>-alkane composition suggest a series of
five distinct dry episodes in southern Iberia at <span class="inline-formula">5.4±0.3</span> ka cal BP, from 5.1 to
<span class="inline-formula">4.9±0.1</span> ka cal BP, from 4.8 to <span class="inline-formula">4.7±0.1</span> ka cal BP, from 4.4 to <span class="inline-formula">4.3±0.1</span> ka cal BP, and at <span class="inline-formula">3.7±0.1</span> ka cal BP. During each dry episode the
vegetation suffered from reduced water availability. Interestingly, the dry phase from
4.4 to <span class="inline-formula">4.3±0.1</span> 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
Cádiz 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.</p> |
| first_indexed | 2024-12-14T21:48:17Z |
| format | Article |
| id | doaj.art-b4f9d85748984990bee51731c249c258 |
| institution | Directory Open Access Journal |
| issn | 1814-9324 1814-9332 |
| language | English |
| last_indexed | 2024-12-14T21:48:17Z |
| publishDate | 2019-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Climate of the Past |
| spelling | doaj.art-b4f9d85748984990bee51731c249c2582022-12-21T22:46:18ZengCopernicus PublicationsClimate of the Past1814-93241814-93322019-04-011561763410.5194/cp-15-617-2019Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-HoloceneJ. Schirrmacher0J. Schirrmacher1M. Weinelt2T. Blanz3N. Andersen4E. Salgueiro5E. Salgueiro6R. R. Schneider7R. R. Schneider8R. R. Schneider9CRC 1266, Christian-Albrechts-Universität, Kiel, 24118, GermanyLeibniz-Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-Universität, Kiel, 24118, GermanyCRC 1266, Christian-Albrechts-Universität, Kiel, 24118, GermanyDepartment of Geosciences, Christian-Albrechts-Universität, Kiel, 24118, GermanyLeibniz-Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-Universität, Kiel, 24118, GermanyDiv. Geologia e Georecursos Marinhos, Instituto Português do Mar e da Atmosfera (IPMA), Lisbon, 1749-077, PortugalCCMAR, Centro de Ciências do Mar, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro, PortugalCRC 1266, Christian-Albrechts-Universität, Kiel, 24118, GermanyLeibniz-Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-Universität, Kiel, 24118, GermanyDepartment of Geosciences, Christian-Albrechts-Universität, Kiel, 24118, Germany<p>To assess the regional multi-decadal to multi-centennial climate variability along the southern Iberian Peninsula during the mid- to late-Holocene record of paleo-environmental indicators from marine sediments were established for two sites in the Alboran Sea (ODP-161-976A) and the Gulf of Cádiz (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 <span class="inline-formula"><i>n</i></span>-alkane composition suggest a series of five distinct dry episodes in southern Iberia at <span class="inline-formula">5.4±0.3</span> ka cal BP, from 5.1 to <span class="inline-formula">4.9±0.1</span> ka cal BP, from 4.8 to <span class="inline-formula">4.7±0.1</span> ka cal BP, from 4.4 to <span class="inline-formula">4.3±0.1</span> ka cal BP, and at <span class="inline-formula">3.7±0.1</span> ka cal BP. During each dry episode the vegetation suffered from reduced water availability. Interestingly, the dry phase from 4.4 to <span class="inline-formula">4.3±0.1</span> 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 Cádiz 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.</p>https://www.clim-past.net/15/617/2019/cp-15-617-2019.pdf |
| spellingShingle | J. Schirrmacher J. Schirrmacher M. Weinelt T. Blanz N. Andersen E. Salgueiro E. Salgueiro R. R. Schneider R. R. Schneider R. R. Schneider Multi-decadal atmospheric and marine climate variability in southern Iberia during the mid- to late-Holocene Climate of the Past |
| title | 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_short | 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 |
| url | https://www.clim-past.net/15/617/2019/cp-15-617-2019.pdf |
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