Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences
Under the framework of the Global Mercury Observation System (GMOS) project, a 3.5-year record of atmospheric gaseous elemental mercury (Hg(0)) has been gathered at Dumont d'Urville (DDU, 66°40′ S, 140°01′ E, 43 m above sea level) on the East Antarctic coast. Additionally, surface snow samples...
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ftdoajarticles:oai:doaj.org/article:4d6a2b7a544a43c8af5c0e36b8dd126e 2023-05-15T13:42:06+02:00 Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences H. Angot I. Dion N. Vogel M. Legrand O. Magand A. Dommergue 2016-07-01T00:00:00Z https://doi.org/10.5194/acp-16-8265-2016 https://doaj.org/article/4d6a2b7a544a43c8af5c0e36b8dd126e EN eng Copernicus Publications https://www.atmos-chem-phys.net/16/8265/2016/acp-16-8265-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-8265-2016 1680-7316 1680-7324 https://doaj.org/article/4d6a2b7a544a43c8af5c0e36b8dd126e Atmospheric Chemistry and Physics, Vol 16, Pp 8265-8279 (2016) Physics QC1-999 Chemistry QD1-999 article 2016 ftdoajarticles https://doi.org/10.5194/acp-16-8265-2016 2022-12-31T06:19:34Z Under the framework of the Global Mercury Observation System (GMOS) project, a 3.5-year record of atmospheric gaseous elemental mercury (Hg(0)) has been gathered at Dumont d'Urville (DDU, 66°40′ S, 140°01′ E, 43 m above sea level) on the East Antarctic coast. Additionally, surface snow samples were collected in February 2009 during a traverse between Concordia Station located on the East Antarctic plateau and DDU. The record of atmospheric Hg(0) at DDU reveals particularities that are not seen at other coastal sites: a gradual decrease of concentrations over the course of winter, and a daily maximum concentration around midday in summer. Additionally, total mercury concentrations in surface snow samples were particularly elevated near DDU (up to 194.4 ng L −1 ) as compared to measurements at other coastal Antarctic sites. These differences can be explained by the more frequent arrival of inland air masses at DDU than at other coastal sites. This confirms the influence of processes observed on the Antarctic plateau on the cycle of atmospheric mercury at a continental scale, especially in areas subject to recurrent katabatic winds. DDU is also influenced by oceanic air masses and our data suggest that the ocean plays a dual role on Hg(0) concentrations. The open ocean may represent a source of atmospheric Hg(0) in summer whereas the sea-ice surface may provide reactive halogens in spring that can oxidize Hg(0). This paper also discusses implications for coastal Antarctic ecosystems and for the cycle of atmospheric mercury in high southern latitudes. Article in Journal/Newspaper Antarc* Antarctic Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) Concordia Station ENVELOPE(123.333,123.333,-75.100,-75.100) Atmospheric Chemistry and Physics 16 13 8265 8279 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 H. Angot I. Dion N. Vogel M. Legrand O. Magand A. Dommergue Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Under the framework of the Global Mercury Observation System (GMOS) project, a 3.5-year record of atmospheric gaseous elemental mercury (Hg(0)) has been gathered at Dumont d'Urville (DDU, 66°40′ S, 140°01′ E, 43 m above sea level) on the East Antarctic coast. Additionally, surface snow samples were collected in February 2009 during a traverse between Concordia Station located on the East Antarctic plateau and DDU. The record of atmospheric Hg(0) at DDU reveals particularities that are not seen at other coastal sites: a gradual decrease of concentrations over the course of winter, and a daily maximum concentration around midday in summer. Additionally, total mercury concentrations in surface snow samples were particularly elevated near DDU (up to 194.4 ng L −1 ) as compared to measurements at other coastal Antarctic sites. These differences can be explained by the more frequent arrival of inland air masses at DDU than at other coastal sites. This confirms the influence of processes observed on the Antarctic plateau on the cycle of atmospheric mercury at a continental scale, especially in areas subject to recurrent katabatic winds. DDU is also influenced by oceanic air masses and our data suggest that the ocean plays a dual role on Hg(0) concentrations. The open ocean may represent a source of atmospheric Hg(0) in summer whereas the sea-ice surface may provide reactive halogens in spring that can oxidize Hg(0). This paper also discusses implications for coastal Antarctic ecosystems and for the cycle of atmospheric mercury in high southern latitudes. |
format |
Article in Journal/Newspaper |
author |
H. Angot I. Dion N. Vogel M. Legrand O. Magand A. Dommergue |
author_facet |
H. Angot I. Dion N. Vogel M. Legrand O. Magand A. Dommergue |
author_sort |
H. Angot |
title |
Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences |
title_short |
Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences |
title_full |
Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences |
title_fullStr |
Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences |
title_full_unstemmed |
Multi-year record of atmospheric mercury at Dumont d'Urville, East Antarctic coast: continental outflow and oceanic influences |
title_sort |
multi-year record of atmospheric mercury at dumont d'urville, east antarctic coast: continental outflow and oceanic influences |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/acp-16-8265-2016 https://doaj.org/article/4d6a2b7a544a43c8af5c0e36b8dd126e |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) ENVELOPE(123.333,123.333,-75.100,-75.100) |
geographic |
Antarctic The Antarctic Dumont d'Urville Dumont-d'Urville Concordia Station |
geographic_facet |
Antarctic The Antarctic Dumont d'Urville Dumont-d'Urville Concordia Station |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Atmospheric Chemistry and Physics, Vol 16, Pp 8265-8279 (2016) |
op_relation |
https://www.atmos-chem-phys.net/16/8265/2016/acp-16-8265-2016.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-16-8265-2016 1680-7316 1680-7324 https://doaj.org/article/4d6a2b7a544a43c8af5c0e36b8dd126e |
op_doi |
https://doi.org/10.5194/acp-16-8265-2016 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
16 |
container_issue |
13 |
container_start_page |
8265 |
op_container_end_page |
8279 |
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1766162631818739712 |