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Intercomparison of volcanic gas monitoring methodologies performed on Vulcano Island, Italy
Author(s) -
Aiuppa Alessandro,
Burton Mike,
Murè Filippo,
Inguaggiato Salvatore
Publication year - 2004
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl018651
Subject(s) - fumarole , fourier transform infrared spectroscopy , volcano , impact crater , sublimation (psychology) , analytical chemistry (journal) , sampling (signal processing) , environmental science , sulfur , chemistry , volcanic gases , filter (signal processing) , mineralogy , environmental chemistry , geology , physics , geochemistry , astrobiology , optics , psychology , organic chemistry , computer science , computer vision , psychotherapist
Volcanic gas emissions from fumaroles on the rim of La Fossa crater, Vulcano Island, Italy, were measured simultaneously using direct sampling (for H 2 O, CO 2 , total sulfur, HCl and HF), filter packs (for SO 2 , HCl, HF) and short‐path active‐mode FTIR measurements (for H 2 O, CO 2 , SO 2 , 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 CO 2 and H 2 O. Amounts of total S observed in direct sampling data were approximately double the amounts of SO 2 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., H 2 S) or to sublimation of elemental S upon exit from the fumarole, after collection by direct sampling but before detection with FTIR and filter packs.