High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control?
International audience Our understanding of past interactions between the development of human societies, the evolution of climate and associated changes in ecosystems and landscape dynamics is conditioned by the acquisition of high resolution records within which specific tracers allow us estimatin...
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ftccsdartic:oai:HAL:insu-00442917v1 2023-05-15T16:52:47+02:00 High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control? Jacob, Jérémy Disnar, Jean-Robert Arnaud, Fabien Billaud, Yves Chapron, Emmanuel Sicre, Marie Alexandrine Boscardin, Rachel Institut des Sciences de la Terre d'Orléans (ISTO) Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Département des Recherches Archéologiques Subaquatiques et Sous-Marines Marseille (DRASSM) Ministère de la Culture (MC) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Vienne, Austria 2009-04 https://hal-insu.archives-ouvertes.fr/insu-00442917 en eng HAL CCSD insu-00442917 https://hal-insu.archives-ouvertes.fr/insu-00442917 EGU https://hal-insu.archives-ouvertes.fr/insu-00442917 EGU, Apr 2009, Vienne, Austria. pp.EGU2009-0, 2009 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/conferenceObject Conference papers 2009 ftccsdartic 2021-12-19T03:56:56Z International audience Our understanding of past interactions between the development of human societies, the evolution of climate and associated changes in ecosystems and landscape dynamics is conditioned by the acquisition of high resolution records within which specific tracers allow us estimating variability. The recent development of a molecular biomarker (miliacin) specific of Panicum miliaceum (common millet) associated with the determination of a biomarker allowing to track soil erosion in the sediments of Lake le Bourget (French Alps; [1], [2]) expands the possibilities afforded by organic geochemistry applied to sedimentary archives to unravel these interactions. Within the frame of the Pygmalion project (ANR Blanc, France) we improved the previous miliacin record from Lake le Bourget sediments [1] to reach an infra-decadal resolution for the 2000-600 BC time period that covers the Bronze Age. Miliacin is detected for the first time in sediment samples dated back to ca. 1700 BC, in agreement with the supposed date of introduction of P. miliaceum in the region. Miliacin concentration is low (ca. 20 ng.g-1) during the 1700-1400 BC interval and then rises to values up to 300 ng.g-1 at 850 BC before the strong decrease to 20 ng.g-1 at 750 BC imputable to the abandonment of palaffitic habitats due to a climatic deterioration at the Bronze Age/Iron Age transition. In addition to this general trend, miliacin concentration shows century-scale variations in the 1700-800 BC interval that share similarities with other records. Two periods of miliacin high concentrations at 950 and 850 BC coincide with high densities of dendrochronological dates acquired on wooden piles and with two periods of lake level lowering.The comparison of miliacin evolution in Lake le Bourget with the high resolution alkenone-derived sea surface temperature (SST) record obtained in the North Atlantic off Iceland [3] shows striking coincidences. Previous studies showed that periods of elevated SSTs in this area coincide with favourable ... Conference Object Iceland North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes Jacob, Jérémy Disnar, Jean-Robert Arnaud, Fabien Billaud, Yves Chapron, Emmanuel Sicre, Marie Alexandrine Boscardin, Rachel High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control? |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Our understanding of past interactions between the development of human societies, the evolution of climate and associated changes in ecosystems and landscape dynamics is conditioned by the acquisition of high resolution records within which specific tracers allow us estimating variability. The recent development of a molecular biomarker (miliacin) specific of Panicum miliaceum (common millet) associated with the determination of a biomarker allowing to track soil erosion in the sediments of Lake le Bourget (French Alps; [1], [2]) expands the possibilities afforded by organic geochemistry applied to sedimentary archives to unravel these interactions. Within the frame of the Pygmalion project (ANR Blanc, France) we improved the previous miliacin record from Lake le Bourget sediments [1] to reach an infra-decadal resolution for the 2000-600 BC time period that covers the Bronze Age. Miliacin is detected for the first time in sediment samples dated back to ca. 1700 BC, in agreement with the supposed date of introduction of P. miliaceum in the region. Miliacin concentration is low (ca. 20 ng.g-1) during the 1700-1400 BC interval and then rises to values up to 300 ng.g-1 at 850 BC before the strong decrease to 20 ng.g-1 at 750 BC imputable to the abandonment of palaffitic habitats due to a climatic deterioration at the Bronze Age/Iron Age transition. In addition to this general trend, miliacin concentration shows century-scale variations in the 1700-800 BC interval that share similarities with other records. Two periods of miliacin high concentrations at 950 and 850 BC coincide with high densities of dendrochronological dates acquired on wooden piles and with two periods of lake level lowering.The comparison of miliacin evolution in Lake le Bourget with the high resolution alkenone-derived sea surface temperature (SST) record obtained in the North Atlantic off Iceland [3] shows striking coincidences. Previous studies showed that periods of elevated SSTs in this area coincide with favourable ... |
author2 |
Institut des Sciences de la Terre d'Orléans (ISTO) Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Environnements, Dynamiques et Territoires de la Montagne (EDYTEM) Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry ) Département des Recherches Archéologiques Subaquatiques et Sous-Marines Marseille (DRASSM) Ministère de la Culture (MC) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
format |
Conference Object |
author |
Jacob, Jérémy Disnar, Jean-Robert Arnaud, Fabien Billaud, Yves Chapron, Emmanuel Sicre, Marie Alexandrine Boscardin, Rachel |
author_facet |
Jacob, Jérémy Disnar, Jean-Robert Arnaud, Fabien Billaud, Yves Chapron, Emmanuel Sicre, Marie Alexandrine Boscardin, Rachel |
author_sort |
Jacob, Jérémy |
title |
High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control? |
title_short |
High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control? |
title_full |
High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control? |
title_fullStr |
High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control? |
title_full_unstemmed |
High resolution record of millet cultivation during the Bronze Age around Lake le Bourget (French Alps). Is there any climatic control? |
title_sort |
high resolution record of millet cultivation during the bronze age around lake le bourget (french alps). is there any climatic control? |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00442917 |
op_coverage |
Vienne, Austria |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
EGU https://hal-insu.archives-ouvertes.fr/insu-00442917 EGU, Apr 2009, Vienne, Austria. pp.EGU2009-0, 2009 |
op_relation |
insu-00442917 https://hal-insu.archives-ouvertes.fr/insu-00442917 |
_version_ |
1766043157983657984 |