A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS)
International audience Mercury (Hg) stable isotopes have been broadly used to investigate the sources, transformation and deposition of atmospheric Hg during the industrial era thanks to the multiple isotope signatures deriving from mass-dependent (represented by δ202Hg) and mass-independent fractio...
Published in: | Geochimica et Cosmochimica Acta |
---|---|
Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
|
Subjects: | |
Online Access: | https://univ-pau.hal.science/hal-03906056 https://univ-pau.hal.science/hal-03906056/document https://univ-pau.hal.science/hal-03906056/file/1-s2.0-S0016703722006305-main.pdf https://doi.org/10.1016/j.gca.2022.11.024 |
id |
ftunivpau:oai:HAL:hal-03906056v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
HAL e2s UPPA (Université de Pau et des Pays de l'Adour) |
op_collection_id |
ftunivpau |
language |
English |
topic |
Hg stable isotopes Southern Hemisphere Peat Rain Hg deposition [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry [CHIM.POLY]Chemical Sciences/Polymers [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [SDE]Environmental Sciences |
spellingShingle |
Hg stable isotopes Southern Hemisphere Peat Rain Hg deposition [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry [CHIM.POLY]Chemical Sciences/Polymers [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [SDE]Environmental Sciences Li, Chuxian Enrico, Maxime Magand, Oliver Araujo, Beatriz, F Le Roux, Gaël Osterwalder, Stefan Dommergue, Aurélien Bertrand, Yann Brioude, Jérôme de Vleeschouwer, François Sonke, Jeroen, E A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS) |
topic_facet |
Hg stable isotopes Southern Hemisphere Peat Rain Hg deposition [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry [CHIM.POLY]Chemical Sciences/Polymers [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [SDE]Environmental Sciences |
description |
International audience Mercury (Hg) stable isotopes have been broadly used to investigate the sources, transformation and deposition of atmospheric Hg during the industrial era thanks to the multiple isotope signatures deriving from mass-dependent (represented by δ202Hg) and mass-independent fractionation (represented by ΔxxxHg) in the environment. Less is known about the impact of past climate change on atmospheric Hg deposition and cycling, and whether Hg isotopes covary with past climate. Here, we investigate Hg concentration and Hg isotope signatures in a 6600-year-old ombrotrophic peat record from Amsterdam Island (AMS, 37.8oS), and in modern AMS rainfall and gaseous elemental Hg (Hg0) samples. Results show that Holocene atmospheric Hg deposition and plant Hg uptake covary with dust deposition, and are both lower under a high humidity regime associated with enhanced Southern Westerly Winds. Modern AMS gaseous Hg0 and rainfall HgII isotope signatures are similar to those in the Northern Hemisphere (NH). Holocene peat Δ199Hg and Δ200Hg are significantly correlated (R2 = 0.67, P < 0.001, n = 58), consistently oscillating between the modern Hg0 and rainfall HgII end-members. Peat Δ200Hg and Δ199Hg provide evidence of plant uptake of Hg0 as the dominant pathway of Hg deposition to AMS peatland, with some exceptions during humid periods. In contrast to NH archives generally documenting a modern increase in Δ199Hg, recent peat layers (post-1900CE) from AMS show the lowest Δ199Hg in the peat profile (−0.42 ± 0.27 ‰, 1σ, n = 8). This likely reflects a significant change in the post-depositional process on deposited anthropogenic Hg in 20th century (i.e. dark abiotic reduction), enabling more negative Δ199Hg to be observed in AMS peat. We further find that the oscillations of Hg isotopes are consistent with established Holocene climate variability from dust proxies. We suggest peat Hg isotope records might be a valid rainfall indicator. |
author2 |
Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France Instituto Franco-Argentino sobre Estudios de Clima y sus Impactos Buenos Aires (IFAECI) Centro de Investigaciones del Mar y la Atmósfera (CIMA) Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET)-Facultad de Ciencias Exactas y Naturales Buenos Aires (FCEyN) Universidad de Buenos Aires Buenos Aires (UBA)-Universidad de Buenos Aires Buenos Aires (UBA)-Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET)-Facultad de Ciencias Exactas y Naturales Buenos Aires (FCEyN) Universidad de Buenos Aires Buenos Aires (UBA)-Universidad de Buenos Aires Buenos Aires (UBA)-Centre National de la Recherche Scientifique (CNRS) IPEV GMOSTRAL |
format |
Article in Journal/Newspaper |
author |
Li, Chuxian Enrico, Maxime Magand, Oliver Araujo, Beatriz, F Le Roux, Gaël Osterwalder, Stefan Dommergue, Aurélien Bertrand, Yann Brioude, Jérôme de Vleeschouwer, François Sonke, Jeroen, E |
author_facet |
Li, Chuxian Enrico, Maxime Magand, Oliver Araujo, Beatriz, F Le Roux, Gaël Osterwalder, Stefan Dommergue, Aurélien Bertrand, Yann Brioude, Jérôme de Vleeschouwer, François Sonke, Jeroen, E |
author_sort |
Li, Chuxian |
title |
A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS) |
title_short |
A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS) |
title_full |
A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS) |
title_fullStr |
A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS) |
title_full_unstemmed |
A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS) |
title_sort |
peat core hg stable isotope reconstruction of holocene atmospheric hg deposition at amsterdam island (37.8os) |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://univ-pau.hal.science/hal-03906056 https://univ-pau.hal.science/hal-03906056/document https://univ-pau.hal.science/hal-03906056/file/1-s2.0-S0016703722006305-main.pdf https://doi.org/10.1016/j.gca.2022.11.024 |
genre |
Amsterdam Island |
genre_facet |
Amsterdam Island |
op_source |
ISSN: 0016-7037 EISSN: 0016-7037 Geochimica et Cosmochimica Acta https://univ-pau.hal.science/hal-03906056 Geochimica et Cosmochimica Acta, 2022, 341, pp.62 - 74. ⟨10.1016/j.gca.2022.11.024⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2022.11.024 hal-03906056 https://univ-pau.hal.science/hal-03906056 https://univ-pau.hal.science/hal-03906056/document https://univ-pau.hal.science/hal-03906056/file/1-s2.0-S0016703722006305-main.pdf doi:10.1016/j.gca.2022.11.024 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.gca.2022.11.024 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
341 |
container_start_page |
62 |
op_container_end_page |
74 |
_version_ |
1810475382232580096 |
spelling |
ftunivpau:oai:HAL:hal-03906056v1 2024-09-15T17:38:47+00:00 A peat core Hg stable isotope reconstruction of Holocene atmospheric Hg deposition at Amsterdam Island (37.8oS) Li, Chuxian Enrico, Maxime Magand, Oliver Araujo, Beatriz, F Le Roux, Gaël Osterwalder, Stefan Dommergue, Aurélien Bertrand, Yann Brioude, Jérôme de Vleeschouwer, François Sonke, Jeroen, E Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) Laboratoire de l'Atmosphère et des Cyclones (LACy) Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France Instituto Franco-Argentino sobre Estudios de Clima y sus Impactos Buenos Aires (IFAECI) Centro de Investigaciones del Mar y la Atmósfera (CIMA) Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET)-Facultad de Ciencias Exactas y Naturales Buenos Aires (FCEyN) Universidad de Buenos Aires Buenos Aires (UBA)-Universidad de Buenos Aires Buenos Aires (UBA)-Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET)-Facultad de Ciencias Exactas y Naturales Buenos Aires (FCEyN) Universidad de Buenos Aires Buenos Aires (UBA)-Universidad de Buenos Aires Buenos Aires (UBA)-Centre National de la Recherche Scientifique (CNRS) IPEV GMOSTRAL 2022-11-23 https://univ-pau.hal.science/hal-03906056 https://univ-pau.hal.science/hal-03906056/document https://univ-pau.hal.science/hal-03906056/file/1-s2.0-S0016703722006305-main.pdf https://doi.org/10.1016/j.gca.2022.11.024 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gca.2022.11.024 hal-03906056 https://univ-pau.hal.science/hal-03906056 https://univ-pau.hal.science/hal-03906056/document https://univ-pau.hal.science/hal-03906056/file/1-s2.0-S0016703722006305-main.pdf doi:10.1016/j.gca.2022.11.024 info:eu-repo/semantics/OpenAccess ISSN: 0016-7037 EISSN: 0016-7037 Geochimica et Cosmochimica Acta https://univ-pau.hal.science/hal-03906056 Geochimica et Cosmochimica Acta, 2022, 341, pp.62 - 74. ⟨10.1016/j.gca.2022.11.024⟩ Hg stable isotopes Southern Hemisphere Peat Rain Hg deposition [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.ANAL]Chemical Sciences/Analytical chemistry [CHIM.POLY]Chemical Sciences/Polymers [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftunivpau https://doi.org/10.1016/j.gca.2022.11.024 2024-07-22T14:02:13Z International audience Mercury (Hg) stable isotopes have been broadly used to investigate the sources, transformation and deposition of atmospheric Hg during the industrial era thanks to the multiple isotope signatures deriving from mass-dependent (represented by δ202Hg) and mass-independent fractionation (represented by ΔxxxHg) in the environment. Less is known about the impact of past climate change on atmospheric Hg deposition and cycling, and whether Hg isotopes covary with past climate. Here, we investigate Hg concentration and Hg isotope signatures in a 6600-year-old ombrotrophic peat record from Amsterdam Island (AMS, 37.8oS), and in modern AMS rainfall and gaseous elemental Hg (Hg0) samples. Results show that Holocene atmospheric Hg deposition and plant Hg uptake covary with dust deposition, and are both lower under a high humidity regime associated with enhanced Southern Westerly Winds. Modern AMS gaseous Hg0 and rainfall HgII isotope signatures are similar to those in the Northern Hemisphere (NH). Holocene peat Δ199Hg and Δ200Hg are significantly correlated (R2 = 0.67, P < 0.001, n = 58), consistently oscillating between the modern Hg0 and rainfall HgII end-members. Peat Δ200Hg and Δ199Hg provide evidence of plant uptake of Hg0 as the dominant pathway of Hg deposition to AMS peatland, with some exceptions during humid periods. In contrast to NH archives generally documenting a modern increase in Δ199Hg, recent peat layers (post-1900CE) from AMS show the lowest Δ199Hg in the peat profile (−0.42 ± 0.27 ‰, 1σ, n = 8). This likely reflects a significant change in the post-depositional process on deposited anthropogenic Hg in 20th century (i.e. dark abiotic reduction), enabling more negative Δ199Hg to be observed in AMS peat. We further find that the oscillations of Hg isotopes are consistent with established Holocene climate variability from dust proxies. We suggest peat Hg isotope records might be a valid rainfall indicator. Article in Journal/Newspaper Amsterdam Island HAL e2s UPPA (Université de Pau et des Pays de l'Adour) Geochimica et Cosmochimica Acta 341 62 74 |