Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records
We present time-series of lead concentration and isotopic ratio in sediments from two French alpine lakes: Lac du Bourget , a suburban lake, and Lac d'Anterne, a mountain lake nearby the Mont-Blanc Range. This approach aims at differentiating "local" from "regional" inputs b...
Main Authors: | , , , , , , |
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Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2003
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Subjects: | |
Online Access: | https://hal.science/hal-00120492 https://doi.org/10.1051/jp4:20030243 |
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ftunigrenoble:oai:HAL:hal-00120492v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
Northern Alps France lake sediment [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Northern Alps France lake sediment [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology [SDE.MCG]Environmental Sciences/Global Changes Arnaud, Fabien Revel, Marie Winiarski, Thierry Bosch, Delphine Chapron, Emmanuel Desmet, Marc Tribovillard, Nicolas Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records |
topic_facet |
Northern Alps France lake sediment [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology [SDE.MCG]Environmental Sciences/Global Changes |
description |
We present time-series of lead concentration and isotopic ratio in sediments from two French alpine lakes: Lac du Bourget , a suburban lake, and Lac d'Anterne, a mountain lake nearby the Mont-Blanc Range. This approach aims at differentiating "local" from "regional" inputs by comparing distant sedimentary records. 210Pb and 137Cs dating methods were validated by historical events recognition [1-2] providing confident age-depth models spanning the last 250 years. In both lakes the sediment is lead-enriched compared to upper continental crust over the whole records. The human impact reached its maximum around 1970 AD, and then presents a rapid decline. Lead concentration and isotopic composition are correlated. When compared to data from a Mont Blanc ice core [3], Lac d'Anterne time-series yields excellent correlation over the last 250 years, confirming the accuracy of both dating process and record of atmospheric lead fall-out. Record from Lac du Bourget presents a similar pattern until 1985 AD when the signal from the high elevation sites ones, both in concentrations and isotopic ratio. Our data confirm the date of 1970 as the maximum of atmospheric lead fall-out over Western Europe. Today, Lac d'Anterne still records a weak airborne contamination, while Lac du Bourget is mostly influenced by local sources. |
author2 |
Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Géodynamique des Chaines Alpines (LGCA) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Tectonophysique (Tectonophysique) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Renard Centre of Marine Geology Universiteit Gent = Ghent University (UGENT) Processus et bilan des domaines sédimentaires (PBDS) Université de Lille, Sciences et Technologies-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Arnaud, Fabien Revel, Marie Winiarski, Thierry Bosch, Delphine Chapron, Emmanuel Desmet, Marc Tribovillard, Nicolas |
author_facet |
Arnaud, Fabien Revel, Marie Winiarski, Thierry Bosch, Delphine Chapron, Emmanuel Desmet, Marc Tribovillard, Nicolas |
author_sort |
Arnaud, Fabien |
title |
Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records |
title_short |
Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records |
title_full |
Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records |
title_fullStr |
Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records |
title_full_unstemmed |
Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records |
title_sort |
lead fall-out isotopic signal over french northern alps : timing and sources constraints from distant lake sediment records |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-00120492 https://doi.org/10.1051/jp4:20030243 |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
ice core |
genre_facet |
ice core |
op_source |
ISSN: 1155-4339 EISSN: 1764-7177 Journal de Physique IV Proceedings https://hal.science/hal-00120492 Journal de Physique IV Proceedings, 2003, 107, pp.61-64. ⟨10.1051/jp4:20030243⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1051/jp4:20030243 hal-00120492 https://hal.science/hal-00120492 doi:10.1051/jp4:20030243 |
op_doi |
https://doi.org/10.1051/jp4:20030243 |
_version_ |
1798847486255693824 |
spelling |
ftunigrenoble:oai:HAL:hal-00120492v1 2024-05-12T08:05:13+00:00 Lead fall-out isotopic signal over French northern Alps : Timing and sources constraints from distant lake sediment records Arnaud, Fabien Revel, Marie Winiarski, Thierry Bosch, Delphine Chapron, Emmanuel Desmet, Marc Tribovillard, Nicolas Environnements, Dynamiques et Territoires de Montagne (EDYTEM) Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Géodynamique des Chaines Alpines (LGCA) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire de Tectonophysique (Tectonophysique) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Renard Centre of Marine Geology Universiteit Gent = Ghent University (UGENT) Processus et bilan des domaines sédimentaires (PBDS) Université de Lille, Sciences et Technologies-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) 2003-05 https://hal.science/hal-00120492 https://doi.org/10.1051/jp4:20030243 en eng HAL CCSD EDP Sciences info:eu-repo/semantics/altIdentifier/doi/10.1051/jp4:20030243 hal-00120492 https://hal.science/hal-00120492 doi:10.1051/jp4:20030243 ISSN: 1155-4339 EISSN: 1764-7177 Journal de Physique IV Proceedings https://hal.science/hal-00120492 Journal de Physique IV Proceedings, 2003, 107, pp.61-64. ⟨10.1051/jp4:20030243⟩ Northern Alps France lake sediment [SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2003 ftunigrenoble https://doi.org/10.1051/jp4:20030243 2024-04-18T04:24:59Z We present time-series of lead concentration and isotopic ratio in sediments from two French alpine lakes: Lac du Bourget , a suburban lake, and Lac d'Anterne, a mountain lake nearby the Mont-Blanc Range. This approach aims at differentiating "local" from "regional" inputs by comparing distant sedimentary records. 210Pb and 137Cs dating methods were validated by historical events recognition [1-2] providing confident age-depth models spanning the last 250 years. In both lakes the sediment is lead-enriched compared to upper continental crust over the whole records. The human impact reached its maximum around 1970 AD, and then presents a rapid decline. Lead concentration and isotopic composition are correlated. When compared to data from a Mont Blanc ice core [3], Lac d'Anterne time-series yields excellent correlation over the last 250 years, confirming the accuracy of both dating process and record of atmospheric lead fall-out. Record from Lac du Bourget presents a similar pattern until 1985 AD when the signal from the high elevation sites ones, both in concentrations and isotopic ratio. Our data confirm the date of 1970 as the maximum of atmospheric lead fall-out over Western Europe. Today, Lac d'Anterne still records a weak airborne contamination, while Lac du Bourget is mostly influenced by local sources. Article in Journal/Newspaper ice core Université Grenoble Alpes: HAL Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) |