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SO 2 ∶HCl ratios in the plumes from Mt. Etna and Vulcano determined by Fourier Transform Spectroscopy
Author(s) -
Francis Peter,
Maciejewski Adam,
Oppenheimer Clive,
Chaffin Charles,
Caltabiano Tommaso
Publication year - 1995
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 - 10.1029/95gl01657
Subject(s) - volcano , flux (metallurgy) , fourier transform infrared spectroscopy , volcanic gases , spectroscopy , geology , analytical chemistry (journal) , fourier transform , infrared spectroscopy , sampling (signal processing) , fourier transform spectroscopy , mineralogy , infrared , atmospheric sciences , materials science , physics , chemistry , geochemistry , environmental chemistry , optics , quantum mechanics , metallurgy , detector
Volcanic gases have important climatic and environmental effects, and provide insights into magmatic processes. Direct sampling of volcanic gases is inherently difficult and often hazardous. Here, we report the results of long path measurements of SO 2 and HCl from Mt. Etna and Vulcano (Italy) obtained by active mode Fourier Transform InfraRed (FTIR) spectroscopy. Spectra recorded in September 1994 over path lengths of up to 2 km indicate SO 2 ∶HCl ratios of 3–5∶1 for Etna, and 0.7–1.4∶1 for Vulcano, consistent with their different styles of activity. Combined with contemporaneous Correlation Spectrometer (COSPEC) SO 2 flux measurements, these ratios indicate an HCl flux for Etna of about 1700 t/d (about 16% of the present global anthropogenic flux) and for Vulcano of about 13 t/d. We also report the first remote spectroscopic detection of volcanic SiF 4 .