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Long-time variation of soil CO2 fluxes at the summit crater of Vulcano (Italy) |
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| Authors: | Salvatore Inguaggiato Lorenzo Calderone Claudio Inguaggiato Agnes Mazot Sabina Morici Fabio Vita |
| Institution: | 1. Sezione di Palermo, Istituto Nazionale di Geofisica e Vulcanologia, via Ugo La Malfa, 143, 90145, Palermo, Italy 2. Facoltà di Scienze Geologiche, Università di Palermo, Palermo, Italy 3. GNS Science Wairakei Research Centre, 114 Karetoto Road, Wairakei, Private Bag 2000, Taupo, New Zealand |
| Abstract: | Here, we report the first continuous data of geochemical parameters acquired directly from the active summit crater of Vulcano. This approach provides a means to better investigate deep geochemical processes associated with the degassing system of Vulcano Island. In particular, we report on soil CO2 fluxes from the upper part of Vulcano, a closed-conduit volcano, from September 2007 to October 2010. Large variations in the soil CO2 and plume SO2 fluxes (order of magnitude), coinciding with other discontinuous geochemical parameters (CO2 concentrations in fumarole gas) and physical parameters (increase of shallow seismic activity and fumarole temperatures) have been recorded. The results from this work suggest new prospects for strengthening geochemical monitoring of volcanic activity and for improving the constraints in the construction of a “geochemical model”, this being a necessary condition to better understand the functioning of volcanic systems. |
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