Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean)
International audience Over the past 50 years, 210Pb, 137Cs and 241Am have been abundantly used in reconstructing recent sediment and peat chronologies. The study of global aerosol-climate interaction is also partially depending on our understanding of 222Rn-210Pb cycling, as radionuclides are usefu...
Published in: | Journal of Environmental Radioactivity |
---|---|
Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2017
|
Subjects: | |
Online Access: | https://hal.science/hal-03512169 https://hal.science/hal-03512169/document https://hal.science/hal-03512169/file/Li_20952.pdf https://doi.org/10.1016/j.jenvrad.2017.05.004 |
id |
ftunivnantes:oai:HAL:hal-03512169v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Peatland Artificial radionuclides [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
Peatland Artificial radionuclides [SDV.EE]Life Sciences [q-bio]/Ecology environment Li, Chuxian Le Roux, Gaël Sonke, Jeroen E. van Beek, Pieter Souhaut, Marc van Der Putten, Nathalie de Vleeschouwer, François Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean) |
topic_facet |
Peatland Artificial radionuclides [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience Over the past 50 years, 210Pb, 137Cs and 241Am have been abundantly used in reconstructing recent sediment and peat chronologies. The study of global aerosol-climate interaction is also partially depending on our understanding of 222Rn-210Pb cycling, as radionuclides are useful aerosol tracers. However, in comparison with the Northern Hemisphere, few data are available for these radionuclides in the Southern Hemisphere, especially in the South Indian Ocean. A peat core was collected in an ombrotrophic peatland from the remote Amsterdam Island (AMS) and was analyzed for 210Pb, 137Cs and 241Am radionuclides using an underground ultra-low background gamma spectrometer. The 210Pb Constant Rate of Supply (CRS) model of peat accumulations is validated by peaks of artificial radionuclides (137Cs and 241Am) that are related to nuclear weapon tests. We compared the AMS 210Pb data with an updated 210Pb deposition database. The 210Pb flux of 98 ± 6 Bq·m−2·y−1 derived from the AMS core agrees with data from Madagascar and South Africa. The elevated flux observed at such a remote location may result from the enhanced 222Rn activity and frequent rainfall in AMS. This enhanced 222Rn activity itself may be explained by continental air masses passing over southern Africa and/or Madagascar. The 210Pb flux at AMS is higher than those derived from cores collected in coastal areas in Argentina and Chile, which are areas dominated by marine westerly winds with low 222Rn activities. We report a 137Cs inventory at AMS of 144 ± 13 Bq·m−2 (corrected to 1969). Our data thus contribute to the under-represented data coverage in the mid-latitudes of the Southern Hemisphere. |
author2 |
Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées Géosciences Environnement Toulouse (GET) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Lund University Lund |
format |
Article in Journal/Newspaper |
author |
Li, Chuxian Le Roux, Gaël Sonke, Jeroen E. van Beek, Pieter Souhaut, Marc van Der Putten, Nathalie de Vleeschouwer, François |
author_facet |
Li, Chuxian Le Roux, Gaël Sonke, Jeroen E. van Beek, Pieter Souhaut, Marc van Der Putten, Nathalie de Vleeschouwer, François |
author_sort |
Li, Chuxian |
title |
Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean) |
title_short |
Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean) |
title_full |
Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean) |
title_fullStr |
Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean) |
title_full_unstemmed |
Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean) |
title_sort |
recent 210 pb, 137 cs and 241 am accumulation in an ombrotrophic peatland from amsterdam island (southern indian ocean) |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-03512169 https://hal.science/hal-03512169/document https://hal.science/hal-03512169/file/Li_20952.pdf https://doi.org/10.1016/j.jenvrad.2017.05.004 |
geographic |
Argentina Indian |
geographic_facet |
Argentina Indian |
genre |
Amsterdam Island |
genre_facet |
Amsterdam Island |
op_source |
ISSN: 0265-931X EISSN: 1879-1700 Journal of Environmental Radioactivity https://hal.science/hal-03512169 Journal of Environmental Radioactivity, 2017, 175-176, pp.164-169. ⟨10.1016/j.jenvrad.2017.05.004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jenvrad.2017.05.004 hal-03512169 https://hal.science/hal-03512169 https://hal.science/hal-03512169/document https://hal.science/hal-03512169/file/Li_20952.pdf doi:10.1016/j.jenvrad.2017.05.004 OATAO: 20952 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.jenvrad.2017.05.004 |
container_title |
Journal of Environmental Radioactivity |
container_volume |
175-176 |
container_start_page |
164 |
op_container_end_page |
169 |
_version_ |
1766365032425193472 |
spelling |
ftunivnantes:oai:HAL:hal-03512169v1 2023-05-15T13:22:27+02:00 Recent 210 Pb, 137 Cs and 241 Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean) Li, Chuxian Le Roux, Gaël Sonke, Jeroen E. van Beek, Pieter Souhaut, Marc van Der Putten, Nathalie de Vleeschouwer, François Laboratoire Ecologie Fonctionnelle et Environnement (LEFE) Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP) Université Fédérale Toulouse Midi-Pyrénées Géosciences Environnement Toulouse (GET) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) Lund University Lund 2017-09 https://hal.science/hal-03512169 https://hal.science/hal-03512169/document https://hal.science/hal-03512169/file/Li_20952.pdf https://doi.org/10.1016/j.jenvrad.2017.05.004 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jenvrad.2017.05.004 hal-03512169 https://hal.science/hal-03512169 https://hal.science/hal-03512169/document https://hal.science/hal-03512169/file/Li_20952.pdf doi:10.1016/j.jenvrad.2017.05.004 OATAO: 20952 info:eu-repo/semantics/OpenAccess ISSN: 0265-931X EISSN: 1879-1700 Journal of Environmental Radioactivity https://hal.science/hal-03512169 Journal of Environmental Radioactivity, 2017, 175-176, pp.164-169. ⟨10.1016/j.jenvrad.2017.05.004⟩ Peatland Artificial radionuclides [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2017 ftunivnantes https://doi.org/10.1016/j.jenvrad.2017.05.004 2023-02-22T02:30:11Z International audience Over the past 50 years, 210Pb, 137Cs and 241Am have been abundantly used in reconstructing recent sediment and peat chronologies. The study of global aerosol-climate interaction is also partially depending on our understanding of 222Rn-210Pb cycling, as radionuclides are useful aerosol tracers. However, in comparison with the Northern Hemisphere, few data are available for these radionuclides in the Southern Hemisphere, especially in the South Indian Ocean. A peat core was collected in an ombrotrophic peatland from the remote Amsterdam Island (AMS) and was analyzed for 210Pb, 137Cs and 241Am radionuclides using an underground ultra-low background gamma spectrometer. The 210Pb Constant Rate of Supply (CRS) model of peat accumulations is validated by peaks of artificial radionuclides (137Cs and 241Am) that are related to nuclear weapon tests. We compared the AMS 210Pb data with an updated 210Pb deposition database. The 210Pb flux of 98 ± 6 Bq·m−2·y−1 derived from the AMS core agrees with data from Madagascar and South Africa. The elevated flux observed at such a remote location may result from the enhanced 222Rn activity and frequent rainfall in AMS. This enhanced 222Rn activity itself may be explained by continental air masses passing over southern Africa and/or Madagascar. The 210Pb flux at AMS is higher than those derived from cores collected in coastal areas in Argentina and Chile, which are areas dominated by marine westerly winds with low 222Rn activities. We report a 137Cs inventory at AMS of 144 ± 13 Bq·m−2 (corrected to 1969). Our data thus contribute to the under-represented data coverage in the mid-latitudes of the Southern Hemisphere. Article in Journal/Newspaper Amsterdam Island Université de Nantes: HAL-UNIV-NANTES Argentina Indian Journal of Environmental Radioactivity 175-176 164 169 |