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://doi.org/10.1038/srep10318 https://hal.archives-ouvertes.fr/hal-01493915/file/srep10318.pdf https://hal.archives-ouvertes.fr/hal-01493915 |
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Open Polar |
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English |
topic |
geo envir |
spellingShingle |
geo envir 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 |
geo envir |
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 national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD) 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 (AWI) |
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://doi.org/10.1038/srep10318 https://hal.archives-ouvertes.fr/hal-01493915/file/srep10318.pdf https://hal.archives-ouvertes.fr/hal-01493915 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
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 |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports Scientific Reports, Nature Publishing Group, 2015, 5, pp.10318. ⟨10.1038/srep10318⟩ |
op_relation |
hal-01493915 doi:10.1038/srep10318 PUBMED: 25993348 10670/1.5unyum https://hal.archives-ouvertes.fr/hal-01493915/file/srep10318.pdf https://hal.archives-ouvertes.fr/hal-01493915 |
op_rights |
other |
op_doi |
https://doi.org/10.1038/srep10318 |
container_title |
Scientific Reports |
container_volume |
5 |
container_issue |
1 |
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1766306191563030528 |
spelling |
fttriple:oai:gotriple.eu:10670/1.5unyum 2023-05-15T14:32:51+02:00 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 national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD) 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 (AWI) 2015-01-01 https://doi.org/10.1038/srep10318 https://hal.archives-ouvertes.fr/hal-01493915/file/srep10318.pdf https://hal.archives-ouvertes.fr/hal-01493915 en eng HAL CCSD Nature Publishing Group hal-01493915 doi:10.1038/srep10318 PUBMED: 25993348 10670/1.5unyum https://hal.archives-ouvertes.fr/hal-01493915/file/srep10318.pdf https://hal.archives-ouvertes.fr/hal-01493915 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 2045-2322 EISSN: 2045-2322 Scientific Reports Scientific Reports, Nature Publishing Group, 2015, 5, pp.10318. ⟨10.1038/srep10318⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2015 fttriple https://doi.org/10.1038/srep10318 2023-01-22T16:40:24Z 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 Unknown Arctic Arctic Ocean Scientific Reports 5 1 |