Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean.
International audience Methylmercury (MeHg) is a neurotoxic compound that threatens wildlife and human health across the Arctic region. Though much is known about the source and dynamics of its inorganic mercury (Hg) precursor, the exact origin of the high MeHg concentrations in Arctic biota remains...
Published in: | Scientific Reports |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2015
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Online Access: | https://hal.science/hal-01493915 https://hal.science/hal-01493915/document https://hal.science/hal-01493915/file/srep10318.pdf https://doi.org/10.1038/srep10318 |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes Heimbürger-Boavida, Lars-Eric Sonke, Jeroen E Cossa, Daniel Point, David Lagane, Christelle Laffont, Laure Galfond, Benjamin T Nicolaus, Marcel Rabe, Benjamin van Der Loeff, Michiel Rutgers Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Methylmercury (MeHg) is a neurotoxic compound that threatens wildlife and human health across the Arctic region. Though much is known about the source and dynamics of its inorganic mercury (Hg) precursor, the exact origin of the high MeHg concentrations in Arctic biota remains uncertain. Arctic coastal sediments, coastal marine waters and surface snow are known sites for MeHg production. Observations on marine Hg dynamics, however, have been restricted to the Canadian Archipelago and the Beaufort Sea (<79 °N). Here we present the first central Arctic Ocean (79-90 °N) profiles for total mercury (tHg) and MeHg. We find elevated tHg and MeHg concentrations in the marginal sea ice zone (81-85 °N). Similar to other open ocean basins, Arctic MeHg concentration maxima also occur in the pycnocline waters, but at much shallower depths (150-200 m). The shallow MeHg maxima just below the productive surface layer possibly result in enhanced biological uptake at the base of the Arctic marine food web and may explain the elevated MeHg concentrations in Arctic biota. We suggest that Arctic warming, through thinning sea ice, extension of the seasonal sea ice zone, intensified surface ocean stratification and shifts in plankton ecodynamics, will likely lead to higher marine MeHg production. |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-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 des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) University of Miami Coral Gables Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association |
format |
Article in Journal/Newspaper |
author |
Heimbürger-Boavida, Lars-Eric Sonke, Jeroen E Cossa, Daniel Point, David Lagane, Christelle Laffont, Laure Galfond, Benjamin T Nicolaus, Marcel Rabe, Benjamin van Der Loeff, Michiel Rutgers |
author_facet |
Heimbürger-Boavida, Lars-Eric Sonke, Jeroen E Cossa, Daniel Point, David Lagane, Christelle Laffont, Laure Galfond, Benjamin T Nicolaus, Marcel Rabe, Benjamin van Der Loeff, Michiel Rutgers |
author_sort |
Heimbürger-Boavida, Lars-Eric |
title |
Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. |
title_short |
Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. |
title_full |
Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. |
title_fullStr |
Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. |
title_full_unstemmed |
Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. |
title_sort |
shallow methylmercury production in the marginal sea ice zone of the central arctic ocean. |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01493915 https://hal.science/hal-01493915/document https://hal.science/hal-01493915/file/srep10318.pdf https://doi.org/10.1038/srep10318 |
genre |
Arctic Arctic Ocean Beaufort Sea Canadian Archipelago Human health Sea ice |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Canadian Archipelago Human health Sea ice |
op_source |
ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-01493915 Scientific Reports, 2015, 5, pp.10318. ⟨10.1038/srep10318⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/srep10318 info:eu-repo/semantics/altIdentifier/pmid/25993348 hal-01493915 https://hal.science/hal-01493915 https://hal.science/hal-01493915/document https://hal.science/hal-01493915/file/srep10318.pdf doi:10.1038/srep10318 PUBMED: 25993348 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/srep10318 |
container_title |
Scientific Reports |
container_volume |
5 |
container_issue |
1 |
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1797575615855984640 |
spelling |
ftmeteofrance:oai:HAL:hal-01493915v1 2024-04-28T08:05:47+00:00 Shallow methylmercury production in the marginal sea ice zone of the central Arctic Ocean. Heimbürger-Boavida, Lars-Eric Sonke, Jeroen E Cossa, Daniel Point, David Lagane, Christelle Laffont, Laure Galfond, Benjamin T Nicolaus, Marcel Rabe, Benjamin van Der Loeff, Michiel Rutgers Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-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 des Sciences de la Terre (ISTerre) Université Joseph Fourier - Grenoble 1 (UJF)-Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-PRES Université de Grenoble-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) University of Miami Coral Gables Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association 2015 https://hal.science/hal-01493915 https://hal.science/hal-01493915/document https://hal.science/hal-01493915/file/srep10318.pdf https://doi.org/10.1038/srep10318 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/srep10318 info:eu-repo/semantics/altIdentifier/pmid/25993348 hal-01493915 https://hal.science/hal-01493915 https://hal.science/hal-01493915/document https://hal.science/hal-01493915/file/srep10318.pdf doi:10.1038/srep10318 PUBMED: 25993348 info:eu-repo/semantics/OpenAccess ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports https://hal.science/hal-01493915 Scientific Reports, 2015, 5, pp.10318. ⟨10.1038/srep10318⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2015 ftmeteofrance https://doi.org/10.1038/srep10318 2024-04-10T23:58:45Z International audience Methylmercury (MeHg) is a neurotoxic compound that threatens wildlife and human health across the Arctic region. Though much is known about the source and dynamics of its inorganic mercury (Hg) precursor, the exact origin of the high MeHg concentrations in Arctic biota remains uncertain. Arctic coastal sediments, coastal marine waters and surface snow are known sites for MeHg production. Observations on marine Hg dynamics, however, have been restricted to the Canadian Archipelago and the Beaufort Sea (<79 °N). Here we present the first central Arctic Ocean (79-90 °N) profiles for total mercury (tHg) and MeHg. We find elevated tHg and MeHg concentrations in the marginal sea ice zone (81-85 °N). Similar to other open ocean basins, Arctic MeHg concentration maxima also occur in the pycnocline waters, but at much shallower depths (150-200 m). The shallow MeHg maxima just below the productive surface layer possibly result in enhanced biological uptake at the base of the Arctic marine food web and may explain the elevated MeHg concentrations in Arctic biota. We suggest that Arctic warming, through thinning sea ice, extension of the seasonal sea ice zone, intensified surface ocean stratification and shifts in plankton ecodynamics, will likely lead to higher marine MeHg production. Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Canadian Archipelago Human health Sea ice Météo-France: HAL Scientific Reports 5 1 |