Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau
The Antarctic Plateau snowpack is an important environment for the mercury geochemical cycle. We have extensively characterized and compared the changes in surface snow and atmospheric mercury concentrations that occur at Dome C. Three summer sampling campaigns were conducted between 2013 and 2016....
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Online Access: | http://hdl.handle.net/10278/3698999 https://doi.org/10.1016/j.chemosphere.2017.12.180 https://www.sciencedirect.com/science/article/pii/S0045653517321586 |
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ftuniveneziairis:oai:iris.unive.it:10278/3698999 2024-04-21T07:52:34+00:00 Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau Andrea Spolaor Hélène Angot Marco Roman Aurélien Dommergue Claudio Scarchilli Massimiliano Vardè Massimo Del Guasta Xanthi Pedeli Cristiano Varin Francesca Sprovieri Olivier Magand Legrand, Michel Réné Carlo Barbante Warren R. L. Cairns Spolaor, Andrea Hélène, Angot Roman, Marco Aurélien, Dommergue Claudio, Scarchilli Massimiliano, Vardè Massimo Del Guasta, Xanthi, Pedeli Varin, Cristiano Francesca, Sprovieri Olivier, Magand Legrand, Michel Réné Barbante, Carlo Cairns, Warren R. L. 2018 STAMPA http://hdl.handle.net/10278/3698999 https://doi.org/10.1016/j.chemosphere.2017.12.180 https://www.sciencedirect.com/science/article/pii/S0045653517321586 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000426231900035 volume:197 firstpage:306 lastpage:317 numberofpages:12 journal:CHEMOSPHERE http://hdl.handle.net/10278/3698999 doi:10.1016/j.chemosphere.2017.12.180 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85041410151 https://www.sciencedirect.com/science/article/pii/S0045653517321586 info:eu-repo/semantics/closedAccess Mercury Antarctica Dome C Halogens Precipitation Snow Settore CHIM/01 - Chimica Analitica info:eu-repo/semantics/article 2018 ftuniveneziairis https://doi.org/10.1016/j.chemosphere.2017.12.180 2024-03-28T01:24:22Z The Antarctic Plateau snowpack is an important environment for the mercury geochemical cycle. We have extensively characterized and compared the changes in surface snow and atmospheric mercury concentrations that occur at Dome C. Three summer sampling campaigns were conducted between 2013 and 2016. The three campaigns had different meteorological conditions that significantly affected mercury deposition processes and its abundance in surface snow. In the absence of snow deposition events, the surface mercury concentration remained stable with narrow oscillations, while an increase in precipitation results in a higher mercury variability. The Hg concentrations detected confirm that snowfall can act as a mercury atmospheric scavenger. A high temporal resolution sampling experiment showed that surface concentration changes are connected with the diurnal solar radiation cycle. Mercury in surface snow is highly dynamic and it could decrease by up to 90% within 4/6 h. A negative relationship between surface snow mercury and atmospheric concentrations has been detected suggesting a mutual dynamic exchange between these two environments. Mercury concentrations were also compared with the Br concentrations in surface and deeper snow, results suggest that Br could have an active role in Hg deposition, particularly when air masses are from coastal areas. This research presents new information on the presence of Hg in surface and deeper snow layers, improving our understanding of atmospheric Hg deposition to the snow surface and the possible role of re-emission on the atmospheric Hg concentration. Article in Journal/Newspaper Antarc* Antarctic Antarctica Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Chemosphere 197 306 317 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Mercury Antarctica Dome C Halogens Precipitation Snow Settore CHIM/01 - Chimica Analitica |
spellingShingle |
Mercury Antarctica Dome C Halogens Precipitation Snow Settore CHIM/01 - Chimica Analitica Andrea Spolaor Hélène Angot Marco Roman Aurélien Dommergue Claudio Scarchilli Massimiliano Vardè Massimo Del Guasta Xanthi Pedeli Cristiano Varin Francesca Sprovieri Olivier Magand Legrand, Michel Réné Carlo Barbante Warren R. L. Cairns Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau |
topic_facet |
Mercury Antarctica Dome C Halogens Precipitation Snow Settore CHIM/01 - Chimica Analitica |
description |
The Antarctic Plateau snowpack is an important environment for the mercury geochemical cycle. We have extensively characterized and compared the changes in surface snow and atmospheric mercury concentrations that occur at Dome C. Three summer sampling campaigns were conducted between 2013 and 2016. The three campaigns had different meteorological conditions that significantly affected mercury deposition processes and its abundance in surface snow. In the absence of snow deposition events, the surface mercury concentration remained stable with narrow oscillations, while an increase in precipitation results in a higher mercury variability. The Hg concentrations detected confirm that snowfall can act as a mercury atmospheric scavenger. A high temporal resolution sampling experiment showed that surface concentration changes are connected with the diurnal solar radiation cycle. Mercury in surface snow is highly dynamic and it could decrease by up to 90% within 4/6 h. A negative relationship between surface snow mercury and atmospheric concentrations has been detected suggesting a mutual dynamic exchange between these two environments. Mercury concentrations were also compared with the Br concentrations in surface and deeper snow, results suggest that Br could have an active role in Hg deposition, particularly when air masses are from coastal areas. This research presents new information on the presence of Hg in surface and deeper snow layers, improving our understanding of atmospheric Hg deposition to the snow surface and the possible role of re-emission on the atmospheric Hg concentration. |
author2 |
Spolaor, Andrea Hélène, Angot Roman, Marco Aurélien, Dommergue Claudio, Scarchilli Massimiliano, Vardè Massimo Del Guasta, Xanthi, Pedeli Varin, Cristiano Francesca, Sprovieri Olivier, Magand Legrand, Michel Réné Barbante, Carlo Cairns, Warren R. L. |
format |
Article in Journal/Newspaper |
author |
Andrea Spolaor Hélène Angot Marco Roman Aurélien Dommergue Claudio Scarchilli Massimiliano Vardè Massimo Del Guasta Xanthi Pedeli Cristiano Varin Francesca Sprovieri Olivier Magand Legrand, Michel Réné Carlo Barbante Warren R. L. Cairns |
author_facet |
Andrea Spolaor Hélène Angot Marco Roman Aurélien Dommergue Claudio Scarchilli Massimiliano Vardè Massimo Del Guasta Xanthi Pedeli Cristiano Varin Francesca Sprovieri Olivier Magand Legrand, Michel Réné Carlo Barbante Warren R. L. Cairns |
author_sort |
Andrea Spolaor |
title |
Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau |
title_short |
Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau |
title_full |
Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau |
title_fullStr |
Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau |
title_full_unstemmed |
Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau |
title_sort |
feedback mechanisms between snow and atmospheric mercury: results and observations from field campaigns on the antarctic plateau |
publishDate |
2018 |
url |
http://hdl.handle.net/10278/3698999 https://doi.org/10.1016/j.chemosphere.2017.12.180 https://www.sciencedirect.com/science/article/pii/S0045653517321586 |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000426231900035 volume:197 firstpage:306 lastpage:317 numberofpages:12 journal:CHEMOSPHERE http://hdl.handle.net/10278/3698999 doi:10.1016/j.chemosphere.2017.12.180 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85041410151 https://www.sciencedirect.com/science/article/pii/S0045653517321586 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.chemosphere.2017.12.180 |
container_title |
Chemosphere |
container_volume |
197 |
container_start_page |
306 |
op_container_end_page |
317 |
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1796935787979210752 |