Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau
The role of deposition fluxes on the mercury cycle at Concordia station, on the high Antarctic plateau have been investigated over the Austral summer between December 2017 to January 2018. Wet/frozen deposition was collected daily from specially sited tables, simultaneously with the collection of su...
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Online Access: | http://hdl.handle.net/10278/3757231 https://doi.org/10.1016/j.atmosenv.2021.118634 https://www.sciencedirect.com/science/article/pii/S1352231021004568?via=ihub |
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ftuniveneziairis:oai:iris.unive.it:10278/3757231 2024-04-21T07:50:59+00:00 Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau Cairns, Warren RL. Turetta, Clara Maffezzoli, Niccolò Magand, Olivier Araujo, Beatriz Ferreira Angot, Hélène Segato, Delia Cristofanelli, Paolo Sprovieri, Francesca Scarchilli, Claudio Grigioni, Paolo Ciardini, Virginia Barbante, Carlo Dommergue, Aurélien Spolaor, Andrea Cairns, Warren RL. Turetta, Clara Maffezzoli, Niccolò Magand, Olivier Araujo, Beatriz Ferreira Angot, Hélène Segato, Delia Cristofanelli, Paolo Sprovieri, Francesca Scarchilli, Claudio Grigioni, Paolo Ciardini, Virginia Barbante, Carlo Dommergue, Aurélien Spolaor, Andrea 2021 http://hdl.handle.net/10278/3757231 https://doi.org/10.1016/j.atmosenv.2021.118634 https://www.sciencedirect.com/science/article/pii/S1352231021004568?via=ihub unknown info:eu-repo/semantics/altIdentifier/wos/WOS:000691215300001 volume:262 firstpage:118634 journal:ATMOSPHERIC ENVIRONMENT http://hdl.handle.net/10278/3757231 doi:10.1016/j.atmosenv.2021.118634 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85111242796 https://www.sciencedirect.com/science/article/pii/S1352231021004568?via=ihub Settore CHIM/01 - Chimica Analitica info:eu-repo/semantics/article 2021 ftuniveneziairis https://doi.org/10.1016/j.atmosenv.2021.118634 2024-03-28T01:26:00Z The role of deposition fluxes on the mercury cycle at Concordia station, on the high Antarctic plateau have been investigated over the Austral summer between December 2017 to January 2018. Wet/frozen deposition was collected daily from specially sited tables, simultaneously with the collection of surface (0–3 cm) and subsurface (3–6 cm) snow and the analysis of Hg0 in the ambient air. Over the course of the experiment the atmospheric Hg0 concentrations ranged from 0.58 ± 0.19 to 1.00 ± 0.33 ng m−3, surface snow Hg concentrations varied between (0–3 cm) 0.006 ± 0.003 to 0.001 ± 0.001 ng cm−3 and subsurface snow (3–6 cm) concentrations varied between 0.001 ± 0.001 to 0.003 ± 0.002 ng cm−3. The maximum daily wet deposition flux was found to be 23 ng m−2 d−1. Despite the low temporal resolution of our measurements combined with their potential errors, the linear regression of the Hg deposition fluxes against the snow accumulation rates allowed us to estimate the mean dry deposition rate from the intercept of the graph as −0.005 +- 0.008 ng m−2 d−1. From this analysis, we conclude that wet deposition accounts for the vast majority of the Hg deposition fluxes at Concordia Station. The number of snow events, together with the continuous GEM measurements have allowed us to make a first estimation of the mean snow scavenging factor at Dome C. Using the slope of the regression of mercury flux on snow accumulation we obtained a snow scavenging factor that ranges from 0.21 to 0.22 ± 0.02 (ngHg/g snow)/(ngHg/m3 air). Our data indicate that the boundary layer height and local meteorological effects influence Hg0 reemission from the top of (0–3 cm) the snowpack into the atmosphere and into the deeper snowpack layer (3–6 cm). These data will help constrain numerical models on the behaviour of mercury in Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Atmospheric Environment 262 118634 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
unknown |
topic |
Settore CHIM/01 - Chimica Analitica |
spellingShingle |
Settore CHIM/01 - Chimica Analitica Cairns, Warren RL. Turetta, Clara Maffezzoli, Niccolò Magand, Olivier Araujo, Beatriz Ferreira Angot, Hélène Segato, Delia Cristofanelli, Paolo Sprovieri, Francesca Scarchilli, Claudio Grigioni, Paolo Ciardini, Virginia Barbante, Carlo Dommergue, Aurélien Spolaor, Andrea Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau |
topic_facet |
Settore CHIM/01 - Chimica Analitica |
description |
The role of deposition fluxes on the mercury cycle at Concordia station, on the high Antarctic plateau have been investigated over the Austral summer between December 2017 to January 2018. Wet/frozen deposition was collected daily from specially sited tables, simultaneously with the collection of surface (0–3 cm) and subsurface (3–6 cm) snow and the analysis of Hg0 in the ambient air. Over the course of the experiment the atmospheric Hg0 concentrations ranged from 0.58 ± 0.19 to 1.00 ± 0.33 ng m−3, surface snow Hg concentrations varied between (0–3 cm) 0.006 ± 0.003 to 0.001 ± 0.001 ng cm−3 and subsurface snow (3–6 cm) concentrations varied between 0.001 ± 0.001 to 0.003 ± 0.002 ng cm−3. The maximum daily wet deposition flux was found to be 23 ng m−2 d−1. Despite the low temporal resolution of our measurements combined with their potential errors, the linear regression of the Hg deposition fluxes against the snow accumulation rates allowed us to estimate the mean dry deposition rate from the intercept of the graph as −0.005 +- 0.008 ng m−2 d−1. From this analysis, we conclude that wet deposition accounts for the vast majority of the Hg deposition fluxes at Concordia Station. The number of snow events, together with the continuous GEM measurements have allowed us to make a first estimation of the mean snow scavenging factor at Dome C. Using the slope of the regression of mercury flux on snow accumulation we obtained a snow scavenging factor that ranges from 0.21 to 0.22 ± 0.02 (ngHg/g snow)/(ngHg/m3 air). Our data indicate that the boundary layer height and local meteorological effects influence Hg0 reemission from the top of (0–3 cm) the snowpack into the atmosphere and into the deeper snowpack layer (3–6 cm). These data will help constrain numerical models on the behaviour of mercury in Antarctica. |
author2 |
Cairns, Warren RL. Turetta, Clara Maffezzoli, Niccolò Magand, Olivier Araujo, Beatriz Ferreira Angot, Hélène Segato, Delia Cristofanelli, Paolo Sprovieri, Francesca Scarchilli, Claudio Grigioni, Paolo Ciardini, Virginia Barbante, Carlo Dommergue, Aurélien Spolaor, Andrea |
format |
Article in Journal/Newspaper |
author |
Cairns, Warren RL. Turetta, Clara Maffezzoli, Niccolò Magand, Olivier Araujo, Beatriz Ferreira Angot, Hélène Segato, Delia Cristofanelli, Paolo Sprovieri, Francesca Scarchilli, Claudio Grigioni, Paolo Ciardini, Virginia Barbante, Carlo Dommergue, Aurélien Spolaor, Andrea |
author_facet |
Cairns, Warren RL. Turetta, Clara Maffezzoli, Niccolò Magand, Olivier Araujo, Beatriz Ferreira Angot, Hélène Segato, Delia Cristofanelli, Paolo Sprovieri, Francesca Scarchilli, Claudio Grigioni, Paolo Ciardini, Virginia Barbante, Carlo Dommergue, Aurélien Spolaor, Andrea |
author_sort |
Cairns, Warren RL. |
title |
Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau |
title_short |
Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau |
title_full |
Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau |
title_fullStr |
Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau |
title_full_unstemmed |
Mercury in precipitated and surface snow at Dome C and a first estimate of mercury depositional fluxes during the Austral summer on the high Antarctic plateau |
title_sort |
mercury in precipitated and surface snow at dome c and a first estimate of mercury depositional fluxes during the austral summer on the high antarctic plateau |
publishDate |
2021 |
url |
http://hdl.handle.net/10278/3757231 https://doi.org/10.1016/j.atmosenv.2021.118634 https://www.sciencedirect.com/science/article/pii/S1352231021004568?via=ihub |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000691215300001 volume:262 firstpage:118634 journal:ATMOSPHERIC ENVIRONMENT http://hdl.handle.net/10278/3757231 doi:10.1016/j.atmosenv.2021.118634 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85111242796 https://www.sciencedirect.com/science/article/pii/S1352231021004568?via=ihub |
op_doi |
https://doi.org/10.1016/j.atmosenv.2021.118634 |
container_title |
Atmospheric Environment |
container_volume |
262 |
container_start_page |
118634 |
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1796934507233804288 |