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Authors: Aiuppa, A.*
Burton, M.*
Murè, F.*
Inguaggiato, S.*
Title: Intercomparison of volcanic gas monitoring methodologies performed on Vulcano Island, Italy
Title of journal: Geophysical Research Letters
Series/Report no.: 31 (2004)
Publisher: American Geophysical Union
Issue Date: 2004
DOI: 10.1029/2003GL018651
Keywords: volcanic gas techniques
gas geochemistry
Abstract: Volcanic gas emissions from fumaroles on the rim of La Fossa crater, Vulcano Island, Italy, were measured simultaneously using direct sampling (for H2O, CO2, total sulfur, HCl and HF), filter packs (for SO2, HCl, HF) and short-path active-mode FTIR measurements (for H2O, CO2,SO2, HCl and HF) in an intercomparison study in May 2002. The results show that Cl/F ratios were in good agreement between all three methods, and that FTIR and direct sampling determined comparable proportions of CO2 and H2O. Amounts of total S observed in direct sampling data were approximately double the amounts of SO2 measured with filter packs and FTIR. This difference could be attributed either to the fact FTIR and filter packs do not measure reduced sulfur species (e.g., H2S) or to sublimation of elemental S upon exit from the fumarole, after collection by direct sampling but before detection with FTIR and filter packs.
Appears in Collections:04.08.07. Instruments and techniques
04.08.01. Gases
04.08.06. Volcano monitoring
Papers Published / Papers in press

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