Updated trends for atmospheric mercury in the Arctic: 1995–2018
The Arctic region forms a unique environment with specific physical, chemical, and biological processes affecting mercury (Hg) cycles and limited anthropogenic Hg sources. However, historic global emissions and long range atmospheric transport has led to elevated Hg in Arctic wildlife and waterways....
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Online Access: | https://hdl.handle.net/11250/2996739 https://doi.org/10.1016/j.scitotenv.2022.155802 |
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ftnilu:oai:nilu.brage.unit.no:11250/2996739 2023-07-30T03:55:56+02:00 Updated trends for atmospheric mercury in the Arctic: 1995–2018 MacSween, Katrina Stupple, Geoff Aas, Wenche Kyllönen, Katriina Pfaffhuber, Katrine Aspmo Skov, Henrik Steffen, Alexandra Berg, Torunn Mastromonaco, Michelle N. 2022 application/pdf https://hdl.handle.net/11250/2996739 https://doi.org/10.1016/j.scitotenv.2022.155802 eng eng NILU - Norsk institutt for luftforskning: 7726 NILU - Norsk institutt for luftforskning: 110035 Miljødirektoratet: * Science of the Total Environment. 2022, 837, 155802. urn:issn:0048-9697 https://hdl.handle.net/11250/2996739 https://doi.org/10.1016/j.scitotenv.2022.155802 cristin:2024733 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Crown Copyright © 2022 Published by Elsevier B.V. 837 Science of the Total Environment 155802 Peer reviewed Journal article 2022 ftnilu https://doi.org/10.1016/j.scitotenv.2022.155802 2023-07-08T19:53:58Z The Arctic region forms a unique environment with specific physical, chemical, and biological processes affecting mercury (Hg) cycles and limited anthropogenic Hg sources. However, historic global emissions and long range atmospheric transport has led to elevated Hg in Arctic wildlife and waterways. Continuous atmospheric Hg measurements, spanning 20 years, and increased monitoring sites has allowed a more comprehensive understanding of how Arctic atmospheric mercury is changing over time. Time-series trend analysis of TGM (Total Gaseous Mercury) in air was performed from 10 circumpolar air monitoring stations, comprising of high-Arctic, and sub-Arctic sites. GOM (gaseous oxidised mercury) and PHg (particulate bound mercury) measurements were also available at 2 high-Arctic sites. Seasonal mean TGM for sub-Arctic sites were lowest during fall ranging from 1.1 ng m−3 Hyytiälä to 1.3 ng m−3, Little Fox Lake. Mean TGM concentrations at high-Arctic sites showed the greatest variability, with highest daily means in spring ranging between 4.2 ng m−3 at Amderma and 2.4 ng m−3 at Zeppelin, largely driven by local chemistry. Annual TGM trend analysis was negative for 8 of the 10 sites. High-Arctic seasonal TGM trends saw smallest decline during summer. Fall trends ranged from −0.8% to −2.6% yr−1. Across the sub-Arctic sites spring showed the largest significant decreases, ranging between −7.7% to −0.36% yr−1, while fall generally had no significant trends. High-Arctic speciation of GOM and PHg at Alert and Zeppelin showed that the timing and composition of atmospheric mercury deposition events are shifting. Alert GOM trends are increasing throughout the year, while PHg trends decreased or not significant. Zeppelin saw the opposite, moving towards increasing PHg and decreasing GOM. Atmospheric mercury trends over the last 20 years indicate that Hg concentrations are decreasing across the Arctic, though not uniformly. This is potentially driven by environmental change, such as plant productivity and sea ice dynamics. ... Article in Journal/Newspaper Amderma Arctic Sea ice NILU – Norwegian Institute for Air Research: NILU Brage Amderma ENVELOPE(61.666,61.666,69.758,69.758) Arctic Fox Lake ENVELOPE(-94.803,-94.803,56.000,56.000) Science of The Total Environment 837 155802 |
institution |
Open Polar |
collection |
NILU – Norwegian Institute for Air Research: NILU Brage |
op_collection_id |
ftnilu |
language |
English |
description |
The Arctic region forms a unique environment with specific physical, chemical, and biological processes affecting mercury (Hg) cycles and limited anthropogenic Hg sources. However, historic global emissions and long range atmospheric transport has led to elevated Hg in Arctic wildlife and waterways. Continuous atmospheric Hg measurements, spanning 20 years, and increased monitoring sites has allowed a more comprehensive understanding of how Arctic atmospheric mercury is changing over time. Time-series trend analysis of TGM (Total Gaseous Mercury) in air was performed from 10 circumpolar air monitoring stations, comprising of high-Arctic, and sub-Arctic sites. GOM (gaseous oxidised mercury) and PHg (particulate bound mercury) measurements were also available at 2 high-Arctic sites. Seasonal mean TGM for sub-Arctic sites were lowest during fall ranging from 1.1 ng m−3 Hyytiälä to 1.3 ng m−3, Little Fox Lake. Mean TGM concentrations at high-Arctic sites showed the greatest variability, with highest daily means in spring ranging between 4.2 ng m−3 at Amderma and 2.4 ng m−3 at Zeppelin, largely driven by local chemistry. Annual TGM trend analysis was negative for 8 of the 10 sites. High-Arctic seasonal TGM trends saw smallest decline during summer. Fall trends ranged from −0.8% to −2.6% yr−1. Across the sub-Arctic sites spring showed the largest significant decreases, ranging between −7.7% to −0.36% yr−1, while fall generally had no significant trends. High-Arctic speciation of GOM and PHg at Alert and Zeppelin showed that the timing and composition of atmospheric mercury deposition events are shifting. Alert GOM trends are increasing throughout the year, while PHg trends decreased or not significant. Zeppelin saw the opposite, moving towards increasing PHg and decreasing GOM. Atmospheric mercury trends over the last 20 years indicate that Hg concentrations are decreasing across the Arctic, though not uniformly. This is potentially driven by environmental change, such as plant productivity and sea ice dynamics. ... |
format |
Article in Journal/Newspaper |
author |
MacSween, Katrina Stupple, Geoff Aas, Wenche Kyllönen, Katriina Pfaffhuber, Katrine Aspmo Skov, Henrik Steffen, Alexandra Berg, Torunn Mastromonaco, Michelle N. |
spellingShingle |
MacSween, Katrina Stupple, Geoff Aas, Wenche Kyllönen, Katriina Pfaffhuber, Katrine Aspmo Skov, Henrik Steffen, Alexandra Berg, Torunn Mastromonaco, Michelle N. Updated trends for atmospheric mercury in the Arctic: 1995–2018 |
author_facet |
MacSween, Katrina Stupple, Geoff Aas, Wenche Kyllönen, Katriina Pfaffhuber, Katrine Aspmo Skov, Henrik Steffen, Alexandra Berg, Torunn Mastromonaco, Michelle N. |
author_sort |
MacSween, Katrina |
title |
Updated trends for atmospheric mercury in the Arctic: 1995–2018 |
title_short |
Updated trends for atmospheric mercury in the Arctic: 1995–2018 |
title_full |
Updated trends for atmospheric mercury in the Arctic: 1995–2018 |
title_fullStr |
Updated trends for atmospheric mercury in the Arctic: 1995–2018 |
title_full_unstemmed |
Updated trends for atmospheric mercury in the Arctic: 1995–2018 |
title_sort |
updated trends for atmospheric mercury in the arctic: 1995–2018 |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/2996739 https://doi.org/10.1016/j.scitotenv.2022.155802 |
long_lat |
ENVELOPE(61.666,61.666,69.758,69.758) ENVELOPE(-94.803,-94.803,56.000,56.000) |
geographic |
Amderma Arctic Fox Lake |
geographic_facet |
Amderma Arctic Fox Lake |
genre |
Amderma Arctic Sea ice |
genre_facet |
Amderma Arctic Sea ice |
op_source |
837 Science of the Total Environment 155802 |
op_relation |
NILU - Norsk institutt for luftforskning: 7726 NILU - Norsk institutt for luftforskning: 110035 Miljødirektoratet: * Science of the Total Environment. 2022, 837, 155802. urn:issn:0048-9697 https://hdl.handle.net/11250/2996739 https://doi.org/10.1016/j.scitotenv.2022.155802 cristin:2024733 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Crown Copyright © 2022 Published by Elsevier B.V. |
op_doi |
https://doi.org/10.1016/j.scitotenv.2022.155802 |
container_title |
Science of The Total Environment |
container_volume |
837 |
container_start_page |
155802 |
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1772810313375154176 |