Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7191
AuthorsBagnato, E.* 
Aiuppa, A.* 
Parello, F.* 
Allard, P.* 
Shinohara, H.* 
Liuzzo, M.* 
Giudice, G.* 
TitleNew clues on the contribution of Earth’s volcanism to the global mercury cycle
Issue Date2011
Series/Report no.5/73(2011)
DOI10.1007/s00445-010-0419-y
URIhttp://hdl.handle.net/2122/7191
KeywordsVolcanogenic mercury
Mercury
Volcanic plume
Mercury flux
Mercury inventories
Atmospheric mercury
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effects 
04. Solid Earth::04.02. Exploration geophysics::04.02.01. Geochemical exploration 
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry 
04. Solid Earth::04.08. Volcanology::04.08.01. Gases 
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
AbstractActive volcanoes are thought to be important contributors to the atmospheric mercury (Hg) budget, and this chemical element is one of the most harmful atmospheric pollutants, owing to its high toxicity and long residence time in ecosystems. There is, however, considerable uncertainty over the magnitude of the global volcanic Hg flux, since the existing data on volcanogenic Hg emissions are sparse and often ambiguous. In an attempt to extend the currently limited dataset on volcanogenic Hg emissions, we summarize the results of Hg flux measurements at seven active open-conduit volcanoes; Stromboli, Asama, Miyakejima, Montserrat, Ambrym, Yasur, and Nyiragongo.. Data from the domebuilding Soufriere Hills volcano are also reported. Using our determined mercury to SO2 mass ratios in tandem with the simultaneously-determined SO2 emission rates, we estimate that the 7 volcanoes have Hg emission rates ranging from 0.2 to 18 t yr-1 (corresponding to a total Hg flux of ~41 t·yr-1). Based on our dataset and previous work, we propose that a Hg/SO2 plume ratio ~10-5 is bestrepresentative of gas emissions from quiescent degassing volcanoes. Using this ratio, we infer a global volcanic Hg flux from persistent degassing of ~95 t·yr-1
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