Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region
International audience Land-sea climatic proxies have been obtained from the Last Glacial section of IMAGES core MD95-2043 (western Mediterranean Sea). Vegetation and alkenone derived SST curves indicate rapid (similar to150 years) and synchronous terrestrial and marine climatic changes, paralleling...
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ftinsu:oai:HAL:hal-01457714v1 2023-12-17T10:31:06+01:00 Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region Sanchezgoni, Mf Cacho, I Turon, Jl Guiot, Joel Sierro, Fj Peypouquet, Jp Grimalt, Jo Shackleton, Nj Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2002-05 https://hal.science/hal-01457714 https://doi.org/10.1007/s00382-001-0212-x en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-001-0212-x hal-01457714 https://hal.science/hal-01457714 doi:10.1007/s00382-001-0212-x ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-01457714 Climate Dynamics, 2002, 19 (1), pp.95-105. ⟨10.1007/s00382-001-0212-x⟩ [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2002 ftinsu https://doi.org/10.1007/s00382-001-0212-x 2023-11-22T17:49:29Z International audience Land-sea climatic proxies have been obtained from the Last Glacial section of IMAGES core MD95-2043 (western Mediterranean Sea). Vegetation and alkenone derived SST curves indicate rapid (similar to150 years) and synchronous terrestrial and marine climatic changes, paralleling the Dansgaard-Oeschger (D-O) climatic variability over Greenland. This frequency of climate change can be related to shifts between the two modes of operation of the North Atlantic Oscillation (NAO). Transfer functions applied to the pollen data indicate that there was an amplification of the climatic signal during Heinrich events (HEs) in comparison with other D-O stadials. The development and persistence of both Scandinavian and Atlantic Mobile Polar Highs over southwestern Europe may explain the extreme cooling (similar to10 degreesC) and dryness (400 mm) during Heinrich events 5 and 4 in the Mediterranean region. Comparison of the results of core MD95-2043 with similar climatic data from IMAGES core MD95-2042, located off Portugal, indicates that thermal and precipitation gradients occurred between the Mediterranean and the Atlantic sides of Iberia within HEs. HEs 4 and 5 are associated with more humid conditions in the Atlantic (by 200 mm) than in the Mediterranean site, as is the case at the present time. This comparison also illustrates the different behaviour of these areas during the D-O stadials. In contrast with the Mediterranean site, the Atlantic site shows similar precipitation and temperature drops for all the D-O stadials, including those related to the HEs. Here we propose the operation of different Mobile Polar Highs (MPH) as the driving mechanism for this difference in behaviour between the Atlantic and Mediterranean sides of Iberia. HEs are related to a stronger influence of the Scandinavian MPH, forcing a severe aridification and cooling of the full Iberian Peninsula. The Atlantic MPH may have been dominant during the other stadials, which would preferentially affect Southwestern Iberia. Article in Journal/Newspaper Greenland North Atlantic North Atlantic oscillation Institut national des sciences de l'Univers: HAL-INSU Greenland Climate Dynamics 19 1 95 105 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.MCG]Environmental Sciences/Global Changes Sanchezgoni, Mf Cacho, I Turon, Jl Guiot, Joel Sierro, Fj Peypouquet, Jp Grimalt, Jo Shackleton, Nj Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Land-sea climatic proxies have been obtained from the Last Glacial section of IMAGES core MD95-2043 (western Mediterranean Sea). Vegetation and alkenone derived SST curves indicate rapid (similar to150 years) and synchronous terrestrial and marine climatic changes, paralleling the Dansgaard-Oeschger (D-O) climatic variability over Greenland. This frequency of climate change can be related to shifts between the two modes of operation of the North Atlantic Oscillation (NAO). Transfer functions applied to the pollen data indicate that there was an amplification of the climatic signal during Heinrich events (HEs) in comparison with other D-O stadials. The development and persistence of both Scandinavian and Atlantic Mobile Polar Highs over southwestern Europe may explain the extreme cooling (similar to10 degreesC) and dryness (400 mm) during Heinrich events 5 and 4 in the Mediterranean region. Comparison of the results of core MD95-2043 with similar climatic data from IMAGES core MD95-2042, located off Portugal, indicates that thermal and precipitation gradients occurred between the Mediterranean and the Atlantic sides of Iberia within HEs. HEs 4 and 5 are associated with more humid conditions in the Atlantic (by 200 mm) than in the Mediterranean site, as is the case at the present time. This comparison also illustrates the different behaviour of these areas during the D-O stadials. In contrast with the Mediterranean site, the Atlantic site shows similar precipitation and temperature drops for all the D-O stadials, including those related to the HEs. Here we propose the operation of different Mobile Polar Highs (MPH) as the driving mechanism for this difference in behaviour between the Atlantic and Mediterranean sides of Iberia. HEs are related to a stronger influence of the Scandinavian MPH, forcing a severe aridification and cooling of the full Iberian Peninsula. The Atlantic MPH may have been dominant during the other stadials, which would preferentially affect Southwestern Iberia. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Sanchezgoni, Mf Cacho, I Turon, Jl Guiot, Joel Sierro, Fj Peypouquet, Jp Grimalt, Jo Shackleton, Nj |
author_facet |
Sanchezgoni, Mf Cacho, I Turon, Jl Guiot, Joel Sierro, Fj Peypouquet, Jp Grimalt, Jo Shackleton, Nj |
author_sort |
Sanchezgoni, Mf |
title |
Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region |
title_short |
Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region |
title_full |
Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region |
title_fullStr |
Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region |
title_full_unstemmed |
Synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the Mediterranean region |
title_sort |
synchroneity between marine and terrestrial responses to millennial scale climatic variability during the last glacial period in the mediterranean region |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-01457714 https://doi.org/10.1007/s00382-001-0212-x |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic North Atlantic oscillation |
genre_facet |
Greenland North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal.science/hal-01457714 Climate Dynamics, 2002, 19 (1), pp.95-105. ⟨10.1007/s00382-001-0212-x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-001-0212-x hal-01457714 https://hal.science/hal-01457714 doi:10.1007/s00382-001-0212-x |
op_doi |
https://doi.org/10.1007/s00382-001-0212-x |
container_title |
Climate Dynamics |
container_volume |
19 |
container_issue |
1 |
container_start_page |
95 |
op_container_end_page |
105 |
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1785584257564934144 |