Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017
The Minamata Convention on Mercury (Hg) entered into force in 2017, committing its 116 parties (as of January 2019) to curb anthropogenic emissions. Monitoring of atmospheric concentrations and trends is an important part of the effectiveness evaluation of the convention. A few years ago (in 2017) w...
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ftcopernicus:oai:publications.copernicus.org:acp83154 2023-05-15T13:22:23+02:00 Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017 Slemr, Franz Martin, Lynwill Labuschagne, Casper Mkololo, Thumeka Angot, Hélène Magand, Olivier Dommergue, Aurélien Garat, Philippe Ramonet, Michel Bieser, Johannes 2020-07-02 application/pdf https://doi.org/10.5194/acp-20-7683-2020 https://www.atmos-chem-phys.net/20/7683/2020/ eng eng doi:10.5194/acp-20-7683-2020 https://www.atmos-chem-phys.net/20/7683/2020/ eISSN: 1680-7324 Text 2020 ftcopernicus https://doi.org/10.5194/acp-20-7683-2020 2020-07-06T16:22:00Z The Minamata Convention on Mercury (Hg) entered into force in 2017, committing its 116 parties (as of January 2019) to curb anthropogenic emissions. Monitoring of atmospheric concentrations and trends is an important part of the effectiveness evaluation of the convention. A few years ago (in 2017) we reported an increasing trend in atmospheric Hg concentrations at the Cape Point Global Atmosphere Watch (GAW) station in South Africa (34.3535 ∘ S, 18.4897 ∘ E) for the 2007–2015 period. With 2 more years of measurements at Cape Point and the 2012–2017 data from Amsterdam Island (37.7983 ∘ S, 77.5378 ∘ E) in the remote southern Indian Ocean, a more complex picture emerges: at Cape Point the upward trend for the 2007–2017 period is still significant, but no trend or a slightly downward trend was detected for the period 2012–2017 at both Cape Point and Amsterdam Island. The upward trend at Cape Point is driven mainly by the Hg concentration minimum in 2009 and maxima in 2014 and 2012. Using ancillary data on 222 Rn , CO, O 3 , CO 2 , and CH 4 from Cape Point and Amsterdam Island, the possible reasons for the trend and its change are investigated. In a companion paper this analysis is extended for the Cape Point station by calculations of source and sink regions using backward-trajectory analysis. Text Amsterdam Island Copernicus Publications: E-Journals Indian Atmospheric Chemistry and Physics 20 13 7683 7692 |
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Copernicus Publications: E-Journals |
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English |
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The Minamata Convention on Mercury (Hg) entered into force in 2017, committing its 116 parties (as of January 2019) to curb anthropogenic emissions. Monitoring of atmospheric concentrations and trends is an important part of the effectiveness evaluation of the convention. A few years ago (in 2017) we reported an increasing trend in atmospheric Hg concentrations at the Cape Point Global Atmosphere Watch (GAW) station in South Africa (34.3535 ∘ S, 18.4897 ∘ E) for the 2007–2015 period. With 2 more years of measurements at Cape Point and the 2012–2017 data from Amsterdam Island (37.7983 ∘ S, 77.5378 ∘ E) in the remote southern Indian Ocean, a more complex picture emerges: at Cape Point the upward trend for the 2007–2017 period is still significant, but no trend or a slightly downward trend was detected for the period 2012–2017 at both Cape Point and Amsterdam Island. The upward trend at Cape Point is driven mainly by the Hg concentration minimum in 2009 and maxima in 2014 and 2012. Using ancillary data on 222 Rn , CO, O 3 , CO 2 , and CH 4 from Cape Point and Amsterdam Island, the possible reasons for the trend and its change are investigated. In a companion paper this analysis is extended for the Cape Point station by calculations of source and sink regions using backward-trajectory analysis. |
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Text |
author |
Slemr, Franz Martin, Lynwill Labuschagne, Casper Mkololo, Thumeka Angot, Hélène Magand, Olivier Dommergue, Aurélien Garat, Philippe Ramonet, Michel Bieser, Johannes |
spellingShingle |
Slemr, Franz Martin, Lynwill Labuschagne, Casper Mkololo, Thumeka Angot, Hélène Magand, Olivier Dommergue, Aurélien Garat, Philippe Ramonet, Michel Bieser, Johannes Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017 |
author_facet |
Slemr, Franz Martin, Lynwill Labuschagne, Casper Mkololo, Thumeka Angot, Hélène Magand, Olivier Dommergue, Aurélien Garat, Philippe Ramonet, Michel Bieser, Johannes |
author_sort |
Slemr, Franz |
title |
Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017 |
title_short |
Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017 |
title_full |
Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017 |
title_fullStr |
Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017 |
title_full_unstemmed |
Atmospheric mercury in the Southern Hemisphere – Part 1: Trend and inter-annual variations in atmospheric mercury at Cape Point, South Africa, in 2007–2017, and on Amsterdam Island in 2012–2017 |
title_sort |
atmospheric mercury in the southern hemisphere – part 1: trend and inter-annual variations in atmospheric mercury at cape point, south africa, in 2007–2017, and on amsterdam island in 2012–2017 |
publishDate |
2020 |
url |
https://doi.org/10.5194/acp-20-7683-2020 https://www.atmos-chem-phys.net/20/7683/2020/ |
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Indian |
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Indian |
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Amsterdam Island |
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Amsterdam Island |
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eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-20-7683-2020 https://www.atmos-chem-phys.net/20/7683/2020/ |
op_doi |
https://doi.org/10.5194/acp-20-7683-2020 |
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Atmospheric Chemistry and Physics |
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20 |
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13 |
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7683 |
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7692 |
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1766364647980531712 |