A. Aiuppa, S. Bellomo, W. D-'alessandro, C. Federico, M. Ferm et al., Volcanic plume monitoring at Mount Etna by diffusive (passive) sampling, Journal of Geophysical Research: Atmospheres, vol.25, issue.D1, pp.10-1029, 2004.
DOI : 10.1029/2003JD004481

A. Aiuppa, C. Federico, A. Franco, G. Giudice, S. Gurrieri et al., Emission of bromine and iodine from Mount Etna volcano, Geochemistry, Geophysics, Geosystems, vol.37, issue.45, pp.800810-1029, 2005.
DOI : 10.1029/2005GC000965

A. Aiuppa, S. Inguaggiato, A. J. Mcgonigle, M. O-'dwyer, C. Oppenheimer et al., S fluxes from Mt. Etna, Stromboli and Vulcano (Italy) and implications for the global volcanic sulfur budget, Geochim. Cosmochim. Acta, issue.2, pp.69-76, 2005.

A. Aiuppa, C. Federico, G. Giudice, and S. Gurrieri, Chemical mapping of a fumarolic field: La Fossa Crater, Vulcano Island (Aeolian Islands, Italy), L13309, pp.10-1029, 2005.
DOI : 10.1029/2005GL023207

A. Aiuppa, S. Bellomo, L. Brusca, W. D-'alessandro, D. Paola et al., Major-ion bulk deposition around an active volcano (Mt. Etna, Italy), Bulletin of Volcanology, vol.108, issue.D1, pp.255-265, 2006.
DOI : 10.1007/s00445-005-0005-x

URL : http://www.earth-prints.org/bitstream/2122/2482/1/579.pdf

A. G. Allen, C. Oppenheimer, M. Ferm, P. J. Baxter, L. A. Horrocks et al., Primary sulfate aerosol and associated emissions from Masaya Volcano, J. Geophys. Res, vol.107, issue.D23, pp.468210-1029, 2002.
DOI : 10.1029/2002jd002120

A. G. Allen, T. A. Mather, A. J. Mcgonigle, A. Aiuppa, P. Delmelle et al., Sources, size distribution and downwind grounding of aerosols from Mt, Etna, J. Geophys. Res, vol.111, p.1030210, 1029.

G. P. Ayers, M. D. Keywood, R. W. Gillet, P. C. Manins, H. Malfroy et al., Validation of passive diffusion samplers for SO, Atmos. Environ, vol.2, issue.32, pp.3593-3600, 1998.

N. Bobrowski, G. Hönninger, B. Galle, and U. Platt, Detection of bromine monoxide in a volcanic plume, Nature, vol.35, issue.30, pp.273-276, 2003.
DOI : 10.1016/S0012-821X(00)00258-2

N. Bobrowski, R. Von-glasow, A. Aiuppa, S. Inguaggiato, I. Louban et al., Halogen Chemistry in Volcanic Plumes, J. Geophys. Res, 2007.

T. Caltabiano, M. Burton, S. Giammanco, P. Allard, N. Bruno et al., Volcanic Gas Emissions From the Summit Craters and Flanks of Mt, Mt. Etna: Volcano Laboratory AGU Geophysical Monograph Series, pp.111-128, 1987.

P. Delmelle, Environmental impacts of tropospheric volcanic gas plumes, in Volcanic degassing, pp.381-399, 2003.

P. Delmelle, J. Stix, C. P. Bourque, P. J. Baxter, J. Garcia-alvarez et al., Dry Deposition and Heavy Acid Loading in the Vicinity of Masaya Volcano, a Major Sulfur and Chlorine Source in Nicaragua, Environmental Science & Technology, vol.35, issue.7, pp.1289-1293, 2001.
DOI : 10.1021/es000153m

P. Delmelle, J. Stix, P. J. Baxter, J. Garcia-alvarez, and J. Barquero, Atmospheric dispersion, environmental effects and potential health hazard associated with the low-altitude gas plume of Masaya volcano, Nicaragua, Bulletin of Volcanology, vol.64, issue.6, pp.423-434, 2002.
DOI : 10.1007/s00445-002-0221-6

M. Ferm, The theories behind diffusive sampling, Paper presented at International Conference Measuring Air Pollutants by Diffusive Sampling, pp.31-40, 2001.

P. Francis, M. R. Burton, and C. Oppenheimer, Remote measurements of volcanic gas compositions by solar occultation spectroscopy, Nature, vol.396, issue.6711, pp.567-570, 1998.
DOI : 10.1038/25115

M. Frische, K. Garofalo, T. H. Hansteen, and R. Borchers, Fluxes and origin of halogenated organic trace gases from Momotombo volcano, pp.10-1029, 2006.

T. M. Gerlach, Volcanic sources of tropospheric ozonedepleting trace gases, Geochem. Geophys. Geosyst, pp.10-1029, 2004.

L. A. Horrocks, C. Oppenheimer, M. R. Burton, and H. J. Duffell, Compositional variation in tropospheric volcanic gas plumes: evidence from ground-based remote sensing, Volcanic degassing, pp.349-369, 2003.
DOI : 10.1144/GSL.SP.2003.213.01.21

C. Lee, Y. J. Kim, H. Tanimoto, N. Bobrowski, U. Platt et al., High ClO and ozone depletion observed in the plume of Sakurajima volcano, Japan, Geophysical Research Letters, vol.29, issue.10, pp.2180910-1029, 2005.
DOI : 10.1029/2005GL023785

D. Martin, B. Ardouin, G. Bergametti, J. Carbonelle, R. Faivre-pierret et al., Geochemistry of sulfur in Mt. Etna plume, J. Geophys. Res, vol.91, pp.12-249, 1986.

R. S. Martin, T. A. Mather, and D. M. Pyle, Modeling the chemistry of high temperature mixtures of magmatic and atmospheric gases, Geochem. Geophys. Geosyst, pp.10-1029, 2006.

T. A. Mather, D. M. Pyle, and C. Oppenheimer, Tropospheric Volcanic Aerosol, in Volcanism and the Earth's Atmosphere, Geophysical Monograph 139, Am. Geophys, pp.189-212, 2003.

T. A. Mather, A. G. Allen, C. Oppenheimer, D. M. Pyle, and A. J. Mc-gonigle, Size-resolved characterisation of soluble ions in the particles in the tropospheric plume of Masaya volcano, Nicaragua: Origins and plume processing, Journal of Atmospheric Chemistry, vol.46, issue.3, pp.207-237, 2003.
DOI : 10.1023/A:1026327502060

A. J. Mcgonigle, P. Delmelle, C. Oppenheimer, V. I. Tsanev, T. Delfosse et al., SO 2 depletion in tropospheric volcanic plumes, Geophys. Res. Lett, 2004.

N. Métrich and R. Clocchiatti, Sulfur abundance and its speciation in oxidized alkaline melts, Geochimica et Cosmochimica Acta, vol.60, issue.21, pp.4151-4160, 1996.
DOI : 10.1016/S0016-7037(96)00229-3

J. M. Nicovich, K. D. Kreutter, C. A. Van-dijk, and P. H. Wine, Temperature-dependent kinetics studies of the reactions bromine atom(2P3/2) + hydrogen sulfide .tautm. mercapto + hydrogen bromide and bromine atom(2P3/2) + methanethiol .tautm. methylthiol + hydrogen bromide. Heats of formation of mercapto and methylthio radicals, P 3,2 )+H 2 S ? ? SH+HBr and Br( 2 P 3,2 )+CH 3 SH ? ? CH 3 S+HBr. Heats of Formation of SH and CH¬S Radicals, pp.2518-2528, 1992.
DOI : 10.1021/j100185a025

C. Oppenheimer, P. Francis, and J. Stix, Depletion rates of sulfur dioxide in tropospheric volcanic plumes, Geophysical Research Letters, vol.56, issue.14, pp.2671-2674, 1998.
DOI : 10.1029/98GL01988

A. Aiuppa, The tropospheric processing of acidic gases Penkett The importance of atmospheric ozone and hydrogen peroxide in oxidising sulphur dioxide in cloud and rainwater, Atmos. Environ, vol.13, pp.123-137, 1979.

A. R. Ravishankara, Heterogeneous and Multiphase Chemistry in the Troposphere, Science, vol.276, issue.5315, pp.1058-1065, 1997.
DOI : 10.1126/science.276.5315.1058

A. Robock, Volcanic eruptions and climate, Reviews of Geophysics, vol.23, issue.44, pp.191-22010, 2000.
DOI : 10.1029/1998RG000054

A. Robock and C. Oppenheimer, Volcanism and the Earth's atmosphere, AGU Geophysical monograph, 2003.

S. P. Sander, R. R. Friedl, D. M. Golden, M. J. Kurylo, G. K. Moortgat et al., Chemical Kinetics and Photochemical Data for Use in Stratospheric Modeling, 2006.

F. M. Schwandner, T. M. Seward, A. P. Gize, P. A. Hall, D. et al., Diffuse emission of organic trace gases from the flank and crater of a quiescent active volcano (Vulcano, Aeolian Islands, Italy), D04301, pp.10-1029, 2004.
DOI : 10.1029/2003JD003890

R. Symonds, W. I. Rose, G. J. Bluth, T. M. Gerlach, M. R. Carroll et al., Volcanic-gas studies: methods, results and applications, Volatiles in Magmas, pp.1-66, 1994.

R. Von-glasow, R. Sander, A. Bott, C. , and P. J. , Modeling halogen chemistry in the marine boundary layer. 1. Cloudfree MBL, J. Geophys. Res, vol.107, pp.434110-1029, 2002.