0000000000176181
AUTHOR
D'alessandro W
Volcanic plume monitoring at mount Etna by diffusive(passive)sampling
This paper reports the use of diffusive tubes in determining HF, HCI, and SO2 in the volcanic plume of Mount Etna in an attempt to highlight the potential of this method in studying volcanoes. In a first application a network of 18 diffusive tubes was installed on Etna's flanks, aimed at evaluating the atmospheric dispersion of the volcanic plume on a local scale. Results showed a monotonic decrease in volatile air concentrations with distance from the craters (HF from 0.15 to <0.003 μmol m-3 , HCl from 2 to <0.01 μmol m -3, and SO2 from 11 to 0.04 μmol m -3 ), revealing the prevalently volcanic contribution. Matching of SO2/HCl and HCl/HF volatile ratios with contemporaneous measurements a…
Soil and groundwater discharge of magmatic CO2 and He on south western Ischia Island (Central Italy)
Magmatic gas leakage at Mt. Etna (Sicily,Italy): Relationships with the vocano-tectonic structures ,the hydrological pattern and the eruptive activity
Geochemistry and mineralogy of travertine deposits of the SW flanks of Mt. Etna: An indicator of past degassing activity
The impact of methanotrophic activity on methane emissions through the soils of geothermal areas
Methane plays an important role in the Earth’s atmospheric chemistry and radiative balance being the most important greenhouse gas after carbon dioxide. It has recently been established that geogenic gases contribute significantly to the natural CH4 flux to the atmosphere (Etiope et al., 2008). Volcanic/geothermal areas contribute to this flux, being the site of widespread diffuse degassing of endogenous gases (Chiodini et al., 2005). In such an environment soils are a source rather than a sink for atmospheric CH4 (Cardellini et al., 2003; Castaldi and Tedesco, 2005; D’Alessandro et al., 2009; 2011; 2013). Due to the fact that methane soil flux measurements are laboratory intensive, very fe…