Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges
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 exc...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00005599 2023-05-15T14:34:28+02:00 Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges Agnan, Yannick Douglas, Thomas A. Helmig, Detlev Hueber, Jacques Obrist, Daniel 2018-06 electronic https://doi.org/10.5194/tc-12-1939-2018 https://noa.gwlb.de/receive/cop_mods_00005599 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005556/tc-12-1939-2018.pdf https://tc.copernicus.org/articles/12/1939/2018/tc-12-1939-2018.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-12-1939-2018 https://noa.gwlb.de/receive/cop_mods_00005599 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005556/tc-12-1939-2018.pdf https://tc.copernicus.org/articles/12/1939/2018/tc-12-1939-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/tc-12-1939-2018 2022-02-08T22:59:26Z 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 ( Hggas0) from the atmosphere to the snowpack to soils. The snowpack itself was unlikely a direct sink for atmospheric Hggas0. In addition, there was no evidence of photochemical reduction of HgII to Hggas0 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 Niedersächsisches Online-Archiv NOA Arctic The Cryosphere 12 6 1939 1956 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Agnan, Yannick Douglas, Thomas A. Helmig, Detlev Hueber, Jacques Obrist, Daniel Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges |
topic_facet |
article Verlagsveröffentlichung |
description |
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 ( Hggas0) from the atmosphere to the snowpack to soils. The snowpack itself was unlikely a direct sink for atmospheric Hggas0. In addition, there was no evidence of photochemical reduction of HgII to Hggas0 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. |
format |
Article in Journal/Newspaper |
author |
Agnan, Yannick Douglas, Thomas A. Helmig, Detlev Hueber, Jacques Obrist, Daniel |
author_facet |
Agnan, Yannick Douglas, Thomas A. 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 |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-1939-2018 https://noa.gwlb.de/receive/cop_mods_00005599 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005556/tc-12-1939-2018.pdf https://tc.copernicus.org/articles/12/1939/2018/tc-12-1939-2018.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic The Cryosphere Tundra Alaska |
genre_facet |
Arctic The Cryosphere Tundra Alaska |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-12-1939-2018 https://noa.gwlb.de/receive/cop_mods_00005599 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00005556/tc-12-1939-2018.pdf https://tc.copernicus.org/articles/12/1939/2018/tc-12-1939-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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_ |
1766307488962969600 |