The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada
International audience Atmospheric Mercury Depletion Events (AMDE) occur in Arctic and Antarctic regions during polar sunrise. During AMDE, reactive gaseous Hg is rapidly formed through in-situ oxidation of gaseous Hg 0 by halogens, notably atomic Br and radical BrO. This leads to high Hg deposition...
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ftanrparis:oai:HAL:insu-03625622v1 2024-09-15T17:44:08+00:00 The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada Carignan, Jean Sonke, Jeroen Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-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) Centre National de la Recherche Scientifique (CNRS) ANR-09-JCJC-0035,MERCY(2009) 2010 https://insu.hal.science/insu-03625622 https://doi.org/10.1016/j.atmosenv.2010.07.052 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/j.atmosenv.2010.07.052 insu-03625622 https://insu.hal.science/insu-03625622 BIBCODE: 2010AtmEn.44.4372C doi:10.1016/j.atmosenv.2010.07.052 Atmospheric Environment https://insu.hal.science/insu-03625622 Atmospheric Environment, 2010, 44 (35), pp.4372-4379. ⟨10.1016/j.atmosenv.2010.07.052⟩ Mercury Atmosphere Arctic Lichens [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2010 ftanrparis https://doi.org/10.1016/j.atmosenv.2010.07.052 2024-07-12T11:01:19Z International audience Atmospheric Mercury Depletion Events (AMDE) occur in Arctic and Antarctic regions during polar sunrise. During AMDE, reactive gaseous Hg is rapidly formed through in-situ oxidation of gaseous Hg 0 by halogens, notably atomic Br and radical BrO. This leads to high Hg deposition fluxes yet an unknown fraction of deposited Hg is reemitted to the atmosphere through subsequent photo-reduction, so that the net deposition flux related to AMDE is not well constrained. Here, Hg and halogens were measured in lichens hanging in tree branches around Hudson Bay where AMDE were reported. Hg concentrations are strongly correlated to halogen elements Br, Cl and I ( r 2 of 0.91, 0.76, 0.81) and decrease with distance from Hudson Bay. We interpret this trend as the result of AMDE, supported by a 1D numerical Br and BrO oxidation model for Hg 0 . Organic carbon normalized Hg contents of down-core lake sediments reported in the literature also show a decreasing trend away from Hudson Bay. Combined observations suggest that at least 50% of Hg deposited during AMDE is reemitted to the atmosphere. Finally, the latitudinal Hg gradient observed in lake sediments suggests that AMDE were active in the Hudson Bay area during the last 90 to 200 years. Article in Journal/Newspaper Antarc* Antarctic Hudson Bay Portail HAL-ANR (Agence Nationale de la Recherche) Atmospheric Environment 44 35 4372 4379 |
institution |
Open Polar |
collection |
Portail HAL-ANR (Agence Nationale de la Recherche) |
op_collection_id |
ftanrparis |
language |
English |
topic |
Mercury Atmosphere Arctic Lichens [SDU]Sciences of the Universe [physics] |
spellingShingle |
Mercury Atmosphere Arctic Lichens [SDU]Sciences of the Universe [physics] Carignan, Jean Sonke, Jeroen The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada |
topic_facet |
Mercury Atmosphere Arctic Lichens [SDU]Sciences of the Universe [physics] |
description |
International audience Atmospheric Mercury Depletion Events (AMDE) occur in Arctic and Antarctic regions during polar sunrise. During AMDE, reactive gaseous Hg is rapidly formed through in-situ oxidation of gaseous Hg 0 by halogens, notably atomic Br and radical BrO. This leads to high Hg deposition fluxes yet an unknown fraction of deposited Hg is reemitted to the atmosphere through subsequent photo-reduction, so that the net deposition flux related to AMDE is not well constrained. Here, Hg and halogens were measured in lichens hanging in tree branches around Hudson Bay where AMDE were reported. Hg concentrations are strongly correlated to halogen elements Br, Cl and I ( r 2 of 0.91, 0.76, 0.81) and decrease with distance from Hudson Bay. We interpret this trend as the result of AMDE, supported by a 1D numerical Br and BrO oxidation model for Hg 0 . Organic carbon normalized Hg contents of down-core lake sediments reported in the literature also show a decreasing trend away from Hudson Bay. Combined observations suggest that at least 50% of Hg deposited during AMDE is reemitted to the atmosphere. Finally, the latitudinal Hg gradient observed in lake sediments suggests that AMDE were active in the Hudson Bay area during the last 90 to 200 years. |
author2 |
Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-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) Centre National de la Recherche Scientifique (CNRS) ANR-09-JCJC-0035,MERCY(2009) |
format |
Article in Journal/Newspaper |
author |
Carignan, Jean Sonke, Jeroen |
author_facet |
Carignan, Jean Sonke, Jeroen |
author_sort |
Carignan, Jean |
title |
The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada |
title_short |
The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada |
title_full |
The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada |
title_fullStr |
The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada |
title_full_unstemmed |
The effect of atmospheric mercury depletion events on the net deposition flux around Hudson Bay, Canada |
title_sort |
effect of atmospheric mercury depletion events on the net deposition flux around hudson bay, canada |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://insu.hal.science/insu-03625622 https://doi.org/10.1016/j.atmosenv.2010.07.052 |
genre |
Antarc* Antarctic Hudson Bay |
genre_facet |
Antarc* Antarctic Hudson Bay |
op_source |
Atmospheric Environment https://insu.hal.science/insu-03625622 Atmospheric Environment, 2010, 44 (35), pp.4372-4379. ⟨10.1016/j.atmosenv.2010.07.052⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.atmosenv.2010.07.052 insu-03625622 https://insu.hal.science/insu-03625622 BIBCODE: 2010AtmEn.44.4372C doi:10.1016/j.atmosenv.2010.07.052 |
op_doi |
https://doi.org/10.1016/j.atmosenv.2010.07.052 |
container_title |
Atmospheric Environment |
container_volume |
44 |
container_issue |
35 |
container_start_page |
4372 |
op_container_end_page |
4379 |
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1810491495298367488 |