Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones
International audience Enhanced erosive phases reconstructed from lake sediments from the Eastern Pyrenees (Ariege, France) have been related to past meteorological to climate variations over the Neoglacial period, and more particularly to the impact of snowmelt processes enhancing erosion of mounta...
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Language: | English |
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HAL CCSD
2016
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Online Access: | https://hal.science/hal-03551119 https://hal.science/hal-03551119/document https://hal.science/hal-03551119/file/EGU2016-17689.pdf |
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English |
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[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
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[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Simonneau, Anaëlle Galop, Didier Chapron, Emmanuel Guyard, Hervé Kazuyo, Tachikawa Mazier, Florence Bard, Edouard Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Enhanced erosive phases reconstructed from lake sediments from the Eastern Pyrenees (Ariege, France) have been related to past meteorological to climate variations over the Neoglacial period, and more particularly to the impact of snowmelt processes enhancing erosion of mountainous drainage basins (1, 2, 3). The distinctive feature of this study is to perform integrative source to sink approaches, classically developed for diachronic climate reconstructions, on five lacustrine sedimentary infills, both sensitive to extreme meteorological events and located within a radius of only 20 km, in order to distinguish local meteorological from global climatic dynamics, and further discuss the influence of westerlies and North Atlantic Oscillation on clastic supply in contrasted lake basins. For each site, age-depth models are based on radionuclides and radiocarbon dating, and the minerogenic properties of the sediment have been characterized combining X-ray imaging, magnetic susceptibility, grain size, X-ray microfluorescence and laser ICP-MS, in order to document clastic sediment source areas. For instance, titanium and potassium are particularly relevant to track metamorphic rocks erosion, whereas rubidium is specific of the granite one. Combined with the grain texture results, such characterization allowed us to order different types of deposits over the Neoglacial period, interpreted as reflecting enhanced local hydrological events, and more particularly the impact of local snowmelt processes. 13 main phases of enhanced erosion associated with climate deterioration phases have been identified and dated to 4715, 4455, 3875, 2620, 1670, 1380, 1035, 845 (AD1105), 620 (AD1330), 430 (AD1520), 215 (AD1735) et 105 (AD1845) cal BP, and to AD1955 et AD1985. Beyond local meteorological fluctuations, the inter-sites comparison of the five lacustrine sequences studied makes the discussion of global climate dynamics possible, performing wavelets analysis, and identifying characteristic frequencies. We ... |
author2 |
Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Biogéosystèmes Continentaux - UMR7327 Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Géographie de l'environnement (GEODE) Université Toulouse - Jean Jaurès (UT2J) Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS) 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) Collège de France - Chaire Evolution du climat et de l'océan Institut de Recherche pour le Développement (IRD)-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)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut de Recherche pour le Développement (IRD)-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)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Conference Object |
author |
Simonneau, Anaëlle Galop, Didier Chapron, Emmanuel Guyard, Hervé Kazuyo, Tachikawa Mazier, Florence Bard, Edouard |
author_facet |
Simonneau, Anaëlle Galop, Didier Chapron, Emmanuel Guyard, Hervé Kazuyo, Tachikawa Mazier, Florence Bard, Edouard |
author_sort |
Simonneau, Anaëlle |
title |
Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones |
title_short |
Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones |
title_full |
Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones |
title_fullStr |
Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones |
title_full_unstemmed |
Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones |
title_sort |
pyrenean erosion fluxes over the neoglacial period: from local meteorological climate dynamics to global ones |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-03551119 https://hal.science/hal-03551119/document https://hal.science/hal-03551119/file/EGU2016-17689.pdf |
op_coverage |
Vienne, Austria |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
EGU General Assembly 2016 https://hal.science/hal-03551119 EGU General Assembly 2016, 2016, Vienne, Austria |
op_relation |
hal-03551119 https://hal.science/hal-03551119 https://hal.science/hal-03551119/document https://hal.science/hal-03551119/file/EGU2016-17689.pdf BIBCODE: 2016EGUGA.1817689S |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
_version_ |
1792051599642722304 |
spelling |
ftccsdartic:oai:HAL:hal-03551119v1 2024-02-27T08:43:35+00:00 Pyrenean Erosion fluxes over the Neoglacial period: From local meteorological climate dynamics to global ones Simonneau, Anaëlle Galop, Didier Chapron, Emmanuel Guyard, Hervé Kazuyo, Tachikawa Mazier, Florence Bard, Edouard Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS) Biogéosystèmes Continentaux - UMR7327 Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-Observatoire des Sciences de l'Univers en région Centre (OSUC) Géographie de l'environnement (GEODE) Université Toulouse - Jean Jaurès (UT2J) Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS) 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) Collège de France - Chaire Evolution du climat et de l'océan Institut de Recherche pour le Développement (IRD)-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)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut de Recherche pour le Développement (IRD)-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)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Vienne, Austria 2016 https://hal.science/hal-03551119 https://hal.science/hal-03551119/document https://hal.science/hal-03551119/file/EGU2016-17689.pdf en eng HAL CCSD hal-03551119 https://hal.science/hal-03551119 https://hal.science/hal-03551119/document https://hal.science/hal-03551119/file/EGU2016-17689.pdf BIBCODE: 2016EGUGA.1817689S http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess EGU General Assembly 2016 https://hal.science/hal-03551119 EGU General Assembly 2016, 2016, Vienne, Austria [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/conferenceObject Conference papers 2016 ftccsdartic 2024-01-28T01:31:08Z International audience Enhanced erosive phases reconstructed from lake sediments from the Eastern Pyrenees (Ariege, France) have been related to past meteorological to climate variations over the Neoglacial period, and more particularly to the impact of snowmelt processes enhancing erosion of mountainous drainage basins (1, 2, 3). The distinctive feature of this study is to perform integrative source to sink approaches, classically developed for diachronic climate reconstructions, on five lacustrine sedimentary infills, both sensitive to extreme meteorological events and located within a radius of only 20 km, in order to distinguish local meteorological from global climatic dynamics, and further discuss the influence of westerlies and North Atlantic Oscillation on clastic supply in contrasted lake basins. For each site, age-depth models are based on radionuclides and radiocarbon dating, and the minerogenic properties of the sediment have been characterized combining X-ray imaging, magnetic susceptibility, grain size, X-ray microfluorescence and laser ICP-MS, in order to document clastic sediment source areas. For instance, titanium and potassium are particularly relevant to track metamorphic rocks erosion, whereas rubidium is specific of the granite one. Combined with the grain texture results, such characterization allowed us to order different types of deposits over the Neoglacial period, interpreted as reflecting enhanced local hydrological events, and more particularly the impact of local snowmelt processes. 13 main phases of enhanced erosion associated with climate deterioration phases have been identified and dated to 4715, 4455, 3875, 2620, 1670, 1380, 1035, 845 (AD1105), 620 (AD1330), 430 (AD1520), 215 (AD1735) et 105 (AD1845) cal BP, and to AD1955 et AD1985. Beyond local meteorological fluctuations, the inter-sites comparison of the five lacustrine sequences studied makes the discussion of global climate dynamics possible, performing wavelets analysis, and identifying characteristic frequencies. We ... Conference Object North Atlantic North Atlantic oscillation Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |