Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges
International audience In the Arctic, the snowpack forms the major interface between atmospheric and terrestrial cycling of mercury (Hg), a global pollutant. We investigated Hg dynamics in an interior Arctic tundra snowpack in northern Alaska during two winter seasons. Using a snow tower system to m...
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ftunivnantes:oai:HAL:hal-01829954v1 2023-05-15T14:34:27+02:00 Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges Agnan, Yannick Douglas, Thomas, Helmig, Detlev Hueber, Jacques Obrist, Daniel Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS) Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) 2018-06-06 https://hal.sorbonne-universite.fr/hal-01829954 https://hal.sorbonne-universite.fr/hal-01829954/document https://hal.sorbonne-universite.fr/hal-01829954/file/tc-12-1939-2018.pdf https://doi.org/10.5194/tc-12-1939-2018 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-12-1939-2018 hal-01829954 https://hal.sorbonne-universite.fr/hal-01829954 https://hal.sorbonne-universite.fr/hal-01829954/document https://hal.sorbonne-universite.fr/hal-01829954/file/tc-12-1939-2018.pdf doi:10.5194/tc-12-1939-2018 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.sorbonne-universite.fr/hal-01829954 The Cryosphere, 2018, 12 (6), pp.1939 - 1956. ⟨10.5194/tc-12-1939-2018⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2018 ftunivnantes https://doi.org/10.5194/tc-12-1939-2018 2023-01-18T01:03:32Z International audience In the Arctic, the snowpack forms the major interface between atmospheric and terrestrial cycling of mercury (Hg), a global pollutant. We investigated Hg dynamics in an interior Arctic tundra snowpack in northern Alaska during two winter seasons. Using a snow tower system to monitor Hg trace gas exchange, we observed consistent concentration declines of gaseous elemental Hg (Hg 0 gas) from the atmosphere to the snowpack to soils. The snowpack itself was unlikely a direct sink for atmospheric Hg 0 gas. In addition , there was no evidence of photochemical reduction of Hg II to Hg 0 gas in the tundra snowpack, with the exception of short periods during late winter in the uppermost snow layer. The patterns in this interior Arctic snowpack thus differ substantially from observations in Arctic coastal and temperate snowpacks. We consistently measured low concentrations of both total and dissolved Hg in snowpack throughout the two seasons. Chemical tracers showed that Hg was mainly associated with local mineral dust and regional marine sea spray inputs. Mass balance calculations show that the snowpack represents a small reservoir of Hg, resulting in low inputs during snowmelt. Taken together, the results from this study suggest that interior Arctic snowpacks are negligible sources of Hg to the Arctic. Article in Journal/Newspaper Arctic The Cryosphere Tundra Alaska Université de Nantes: HAL-UNIV-NANTES Arctic The Cryosphere 12 6 1939 1956 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Agnan, Yannick Douglas, Thomas, Helmig, Detlev Hueber, Jacques Obrist, Daniel Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience In the Arctic, the snowpack forms the major interface between atmospheric and terrestrial cycling of mercury (Hg), a global pollutant. We investigated Hg dynamics in an interior Arctic tundra snowpack in northern Alaska during two winter seasons. Using a snow tower system to monitor Hg trace gas exchange, we observed consistent concentration declines of gaseous elemental Hg (Hg 0 gas) from the atmosphere to the snowpack to soils. The snowpack itself was unlikely a direct sink for atmospheric Hg 0 gas. In addition , there was no evidence of photochemical reduction of Hg II to Hg 0 gas in the tundra snowpack, with the exception of short periods during late winter in the uppermost snow layer. The patterns in this interior Arctic snowpack thus differ substantially from observations in Arctic coastal and temperate snowpacks. We consistently measured low concentrations of both total and dissolved Hg in snowpack throughout the two seasons. Chemical tracers showed that Hg was mainly associated with local mineral dust and regional marine sea spray inputs. Mass balance calculations show that the snowpack represents a small reservoir of Hg, resulting in low inputs during snowmelt. Taken together, the results from this study suggest that interior Arctic snowpacks are negligible sources of Hg to the Arctic. |
author2 |
Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS) Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Agnan, Yannick Douglas, Thomas, Helmig, Detlev Hueber, Jacques Obrist, Daniel |
author_facet |
Agnan, Yannick Douglas, Thomas, Helmig, Detlev Hueber, Jacques Obrist, Daniel |
author_sort |
Agnan, Yannick |
title |
Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
title_short |
Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
title_full |
Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
title_fullStr |
Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
title_full_unstemmed |
Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
title_sort |
mercury in the arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.sorbonne-universite.fr/hal-01829954 https://hal.sorbonne-universite.fr/hal-01829954/document https://hal.sorbonne-universite.fr/hal-01829954/file/tc-12-1939-2018.pdf https://doi.org/10.5194/tc-12-1939-2018 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic The Cryosphere Tundra Alaska |
genre_facet |
Arctic The Cryosphere Tundra Alaska |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.sorbonne-universite.fr/hal-01829954 The Cryosphere, 2018, 12 (6), pp.1939 - 1956. ⟨10.5194/tc-12-1939-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-12-1939-2018 hal-01829954 https://hal.sorbonne-universite.fr/hal-01829954 https://hal.sorbonne-universite.fr/hal-01829954/document https://hal.sorbonne-universite.fr/hal-01829954/file/tc-12-1939-2018.pdf doi:10.5194/tc-12-1939-2018 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-12-1939-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
6 |
container_start_page |
1939 |
op_container_end_page |
1956 |
_version_ |
1766307487717261312 |