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	Author	Andrea Spolaor, Hélène Angot, Marco Roman, Aurélien Dommergue, Claudio Scarchilli, Massimiliano Vardè, Massimo Del Guasta, Xanthi Pedeli, Cristiano Varin, Francesca Sprovieri, Olivier Magand, Michel Legrand, Carlo Barbante, Warren R. L. Cairns
	Title	Feedback mechanisms between snow and atmospheric mercury: Results and observations from field campaigns on the Antarctic plateau			Type	Journal
	Year	2018	Publication	Chemosphere	Abbreviated Journal
	Volume	197	Issue		Pages	306-317
	Keywords	Antarctica Dome C Halogens Mercury Precipitation Snow
	Abstract	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.
	Programme	414,1028
	Campaign
	Address
	Corporate Author				Thesis	Bachelor's thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0045-6535	ISBN	0045-6535	Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number				Serial	7229
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