Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record
International audience Abrupt changes in Western Mediterranean climate during the last deglaciation (20 to 6 cal ka BP) are detected in marine core MD95-2043 (Alboran Sea) through the investigation of high-resolution pollen data and pollen-based climate reconstructions by the modern analogue techniq...
Published in: | Climate of the Past |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal.science/hal-00419714 https://hal.science/hal-00419714/document https://hal.science/hal-00419714/file/cp-6-245-2010-1.pdf https://doi.org/10.5194/cp-6-245-2010 |
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Université de Franche-Comté (UFC): HAL |
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English |
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[SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
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[SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Fletcher, W. J. Sanchez Goñi, M. F. Peyron, O. Dormoy, I. Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record |
topic_facet |
[SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Abrupt changes in Western Mediterranean climate during the last deglaciation (20 to 6 cal ka BP) are detected in marine core MD95-2043 (Alboran Sea) through the investigation of high-resolution pollen data and pollen-based climate reconstructions by the modern analogue technique (MAT) for annual precipitation (Pann) and mean temperatures of the coldest and warmest months (MTCO and MTWA). Changes in temperate Mediterranean forest development and composition and MAT reconstructions indicate major climatic shifts with parallel temperature and precipitation changes at the onsets of Heinrich stadial 1 (equivalent to the Oldest Dryas), the Bölling-Allerød (BA), and the Younger Dryas (YD). Multi-centennial-scale oscillations in forest development occurred throughout the BA, YD, and early Holocene. Shifts in vegetation composition and (Pann reconstructions indicate that forest declines occurred during dry, and generally cool, episodes centred at 14.0, 13.3, 12.9, 11.8, 10.7, 10.1, 9.2, 8.3 and 7.4 cal ka BP. The forest record also suggests multiple, low-amplitude Preboreal (PB) climate oscillations, and a marked increase in moisture availability for forest development at the end of the PB at 10.6 cal ka BP. Dry atmospheric conditions in the Western Mediterranean occurred in phase with Lateglacial events of high-latitude cooling including GI-1d (Older Dryas), GI-1b (Intra-Allerød Cold Period) and GS-1 (YD), and during Holocene events associated with high-latitude cooling, meltwater pulses and N. Atlantic ice-rafting. A possible climatic mechanism for the recurrence of dry intervals and an opposed regional precipitation pattern with respect to Western-central Europe relates to the dynamics of the westerlies and the prevalence of atmospheric blocking highs. Comparison of radiocarbon and ice-core ages for well-defined climatic transitions in the forest record suggests possible enhancement of marine reservoir ages in the Alboran Sea by 200 years (surface water age 600 years) during the Lateglacial. |
author2 |
University of Manchester Manchester Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL) Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) ANR-07-BLAN-0009,LAMA,Holocene changes in environment and climate, and history of human societies in Central Mediterranean as reflected by LAke and MArine records(2007) |
format |
Article in Journal/Newspaper |
author |
Fletcher, W. J. Sanchez Goñi, M. F. Peyron, O. Dormoy, I. |
author_facet |
Fletcher, W. J. Sanchez Goñi, M. F. Peyron, O. Dormoy, I. |
author_sort |
Fletcher, W. J. |
title |
Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record |
title_short |
Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record |
title_full |
Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record |
title_fullStr |
Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record |
title_full_unstemmed |
Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record |
title_sort |
abrupt climate changes of the last deglaciation detected in a western mediterranean forest record |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00419714 https://hal.science/hal-00419714/document https://hal.science/hal-00419714/file/cp-6-245-2010-1.pdf https://doi.org/10.5194/cp-6-245-2010 |
genre |
ice core |
genre_facet |
ice core |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00419714 Climate of the Past, 2010, 6 (2), pp.245-264. ⟨10.5194/cp-6-245-2010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-6-245-2010 hal-00419714 https://hal.science/hal-00419714 https://hal.science/hal-00419714/document https://hal.science/hal-00419714/file/cp-6-245-2010-1.pdf doi:10.5194/cp-6-245-2010 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-6-245-2010 |
container_title |
Climate of the Past |
container_volume |
6 |
container_issue |
2 |
container_start_page |
245 |
op_container_end_page |
264 |
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1799481659805925376 |
spelling |
ftunifranchecom:oai:HAL:hal-00419714v1 2024-05-19T07:42:02+00:00 Abrupt climate changes of the last deglaciation detected in a Western Mediterranean forest record Fletcher, W. J. Sanchez Goñi, M. F. Peyron, O. Dormoy, I. University of Manchester Manchester Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL) Laboratoire Chrono-environnement (UMR 6249) (LCE) Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC) Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC) ANR-07-BLAN-0009,LAMA,Holocene changes in environment and climate, and history of human societies in Central Mediterranean as reflected by LAke and MArine records(2007) 2010 https://hal.science/hal-00419714 https://hal.science/hal-00419714/document https://hal.science/hal-00419714/file/cp-6-245-2010-1.pdf https://doi.org/10.5194/cp-6-245-2010 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-6-245-2010 hal-00419714 https://hal.science/hal-00419714 https://hal.science/hal-00419714/document https://hal.science/hal-00419714/file/cp-6-245-2010-1.pdf doi:10.5194/cp-6-245-2010 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00419714 Climate of the Past, 2010, 6 (2), pp.245-264. ⟨10.5194/cp-6-245-2010⟩ [SDE.MCG]Environmental Sciences/Global Changes [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2010 ftunifranchecom https://doi.org/10.5194/cp-6-245-2010 2024-04-25T14:15:15Z International audience Abrupt changes in Western Mediterranean climate during the last deglaciation (20 to 6 cal ka BP) are detected in marine core MD95-2043 (Alboran Sea) through the investigation of high-resolution pollen data and pollen-based climate reconstructions by the modern analogue technique (MAT) for annual precipitation (Pann) and mean temperatures of the coldest and warmest months (MTCO and MTWA). Changes in temperate Mediterranean forest development and composition and MAT reconstructions indicate major climatic shifts with parallel temperature and precipitation changes at the onsets of Heinrich stadial 1 (equivalent to the Oldest Dryas), the Bölling-Allerød (BA), and the Younger Dryas (YD). Multi-centennial-scale oscillations in forest development occurred throughout the BA, YD, and early Holocene. Shifts in vegetation composition and (Pann reconstructions indicate that forest declines occurred during dry, and generally cool, episodes centred at 14.0, 13.3, 12.9, 11.8, 10.7, 10.1, 9.2, 8.3 and 7.4 cal ka BP. The forest record also suggests multiple, low-amplitude Preboreal (PB) climate oscillations, and a marked increase in moisture availability for forest development at the end of the PB at 10.6 cal ka BP. Dry atmospheric conditions in the Western Mediterranean occurred in phase with Lateglacial events of high-latitude cooling including GI-1d (Older Dryas), GI-1b (Intra-Allerød Cold Period) and GS-1 (YD), and during Holocene events associated with high-latitude cooling, meltwater pulses and N. Atlantic ice-rafting. A possible climatic mechanism for the recurrence of dry intervals and an opposed regional precipitation pattern with respect to Western-central Europe relates to the dynamics of the westerlies and the prevalence of atmospheric blocking highs. Comparison of radiocarbon and ice-core ages for well-defined climatic transitions in the forest record suggests possible enhancement of marine reservoir ages in the Alboran Sea by 200 years (surface water age 600 years) during the Lateglacial. Article in Journal/Newspaper ice core Université de Franche-Comté (UFC): HAL Climate of the Past 6 2 245 264 |