Arctic mercury cycling
Anthropogenic mercury (Hg) emissions have driven marked increases in Arctic Hg levels, which are now being impacted by regional warming, with uncertain ecological consequences. This Review presents a comprehensive assessment of the present-day total Hg mass balance in the Arctic. Over 98% of atmosph...
Published in: | Nature Reviews Earth & Environment |
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Online Access: | https://doi.org/10.1038/s43017-022-00269-w http://infoscience.epfl.ch/record/292893 |
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ftinfoscience:oai:infoscience.epfl.ch:292893 2023-05-15T14:33:51+02:00 Arctic mercury cycling Dastoor, Ashu Angot, Hélène Bieser, Johannes Christensen, Jesper Douglas, Thomas Heimbürger-Boavida, Lars-Eric Jiskra, Martin Mason, Robert McLagan, David Obrist, Daniel Outridge, Peter Petrova, Mariia Ryjkov, Andrei St. Pierre, Kyra Schartup, Amina Soerensen, Anne Toyota, Kenjiro Travnikov, Oleg Wilson, Simon Zdanowicz, Christian 2022-03-23T10:16:22Z https://doi.org/10.1038/s43017-022-00269-w http://infoscience.epfl.ch/record/292893 unknown doi:10.1038/s43017-022-00269-w http://infoscience.epfl.ch/record/292893 http://infoscience.epfl.ch/record/292893 Text 2022 ftinfoscience https://doi.org/10.1038/s43017-022-00269-w 2023-02-13T23:09:23Z Anthropogenic mercury (Hg) emissions have driven marked increases in Arctic Hg levels, which are now being impacted by regional warming, with uncertain ecological consequences. This Review presents a comprehensive assessment of the present-day total Hg mass balance in the Arctic. Over 98% of atmospheric Hg is emitted outside the region and is transported to the Arctic via long-range air and ocean transport. Around two thirds of this Hg is deposited in terrestrial ecosystems, where it predominantly accumulates in soils via vegetation uptake. Rivers and coastal erosion transfer about 80 Mg year−1 of terrestrial Hg to the Arctic Ocean, in approximate balance with modelled net terrestrial Hg deposition in the region. The revised Arctic Ocean Hg mass balance suggests net atmospheric Hg deposition to the ocean and that Hg burial in inner-shelf sediments is underestimated (up to >100%), needing seasonal observations of sediment-ocean Hg exchange. Terrestrial Hg mobilization pathways from soils and the cryosphere (permafrost, ice, snow and glaciers) remain uncertain. Improved soil, snowpack and glacial Hg inventories, transfer mechanisms of riverine Hg releases under accelerated glacier and soil thaw, coupled atmosphere–terrestrial modelling and monitoring of Hg in sensitive ecosystems such as fjords can help to anticipate impacts on downstream Arctic ecosystems. Text Arctic Arctic Ocean Ice permafrost EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Arctic Arctic Ocean Nature Reviews Earth & Environment |
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EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
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ftinfoscience |
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unknown |
description |
Anthropogenic mercury (Hg) emissions have driven marked increases in Arctic Hg levels, which are now being impacted by regional warming, with uncertain ecological consequences. This Review presents a comprehensive assessment of the present-day total Hg mass balance in the Arctic. Over 98% of atmospheric Hg is emitted outside the region and is transported to the Arctic via long-range air and ocean transport. Around two thirds of this Hg is deposited in terrestrial ecosystems, where it predominantly accumulates in soils via vegetation uptake. Rivers and coastal erosion transfer about 80 Mg year−1 of terrestrial Hg to the Arctic Ocean, in approximate balance with modelled net terrestrial Hg deposition in the region. The revised Arctic Ocean Hg mass balance suggests net atmospheric Hg deposition to the ocean and that Hg burial in inner-shelf sediments is underestimated (up to >100%), needing seasonal observations of sediment-ocean Hg exchange. Terrestrial Hg mobilization pathways from soils and the cryosphere (permafrost, ice, snow and glaciers) remain uncertain. Improved soil, snowpack and glacial Hg inventories, transfer mechanisms of riverine Hg releases under accelerated glacier and soil thaw, coupled atmosphere–terrestrial modelling and monitoring of Hg in sensitive ecosystems such as fjords can help to anticipate impacts on downstream Arctic ecosystems. |
format |
Text |
author |
Dastoor, Ashu Angot, Hélène Bieser, Johannes Christensen, Jesper Douglas, Thomas Heimbürger-Boavida, Lars-Eric Jiskra, Martin Mason, Robert McLagan, David Obrist, Daniel Outridge, Peter Petrova, Mariia Ryjkov, Andrei St. Pierre, Kyra Schartup, Amina Soerensen, Anne Toyota, Kenjiro Travnikov, Oleg Wilson, Simon Zdanowicz, Christian |
spellingShingle |
Dastoor, Ashu Angot, Hélène Bieser, Johannes Christensen, Jesper Douglas, Thomas Heimbürger-Boavida, Lars-Eric Jiskra, Martin Mason, Robert McLagan, David Obrist, Daniel Outridge, Peter Petrova, Mariia Ryjkov, Andrei St. Pierre, Kyra Schartup, Amina Soerensen, Anne Toyota, Kenjiro Travnikov, Oleg Wilson, Simon Zdanowicz, Christian Arctic mercury cycling |
author_facet |
Dastoor, Ashu Angot, Hélène Bieser, Johannes Christensen, Jesper Douglas, Thomas Heimbürger-Boavida, Lars-Eric Jiskra, Martin Mason, Robert McLagan, David Obrist, Daniel Outridge, Peter Petrova, Mariia Ryjkov, Andrei St. Pierre, Kyra Schartup, Amina Soerensen, Anne Toyota, Kenjiro Travnikov, Oleg Wilson, Simon Zdanowicz, Christian |
author_sort |
Dastoor, Ashu |
title |
Arctic mercury cycling |
title_short |
Arctic mercury cycling |
title_full |
Arctic mercury cycling |
title_fullStr |
Arctic mercury cycling |
title_full_unstemmed |
Arctic mercury cycling |
title_sort |
arctic mercury cycling |
publishDate |
2022 |
url |
https://doi.org/10.1038/s43017-022-00269-w http://infoscience.epfl.ch/record/292893 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Ice permafrost |
genre_facet |
Arctic Arctic Ocean Ice permafrost |
op_source |
http://infoscience.epfl.ch/record/292893 |
op_relation |
doi:10.1038/s43017-022-00269-w http://infoscience.epfl.ch/record/292893 |
op_doi |
https://doi.org/10.1038/s43017-022-00269-w |
container_title |
Nature Reviews Earth & Environment |
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1766307022925463552 |