HR: 0830h
AN: V21C-0535    [PDF]
TI: Mt. Etna (Italy) 2002 eruption: time variations of the diffuse CO2 emissions
AU: * Gurrieri, S
EM: gurrieri@pa.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Palermo, V. Ugo La Malfa 153, Palermo, PA 90146 Italy
AU: Giudice, G
EM: ggiudice@pa.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Palermo, V. Ugo La Malfa 153, Palermo, PA 90146 Italy
AB: Soil degassing is a very common phenomenon occurring in active volcanic areas (Carapezza et al., 1980, Boubron et al. 1996, Gurrieri \& Valenza 1988, Giammanco et al., 1995). In some cases, such as Mt. Etna, the total amount of soil CO2 emissions resulted comparable to the CO2 output released from the main craters (Allard et al., 1991; D'Alessandro et al., 1997). Moreover, the time variations of the soil degassing appear to be strictly correlated to the volcanic activity (Giammanco et al., 1995). Since December 2002, a network for continuous monitoring of soil CO2 degassing was installed on Mt. Etna to verify the last hypothesis. Mt. Etna is an active volcano characterized by frequent eruptions (last erupted on 2002, October 28th, one year after the previous eruption) located on the eastern part of Sicily (Italy). The remote stations were initially installed in two sites located on the East and South West flanks of the volcano. Data series recorded in these two sites during 6 months of observations before and after the end of the 2002 eruption show an opposite behavior which probably represent different degassing steps in the magma uprising towards the surface. Time correlations between variations of soil gas and of atmospheric parameters such as rain, pressure and temperature, were found only for short period. A discrete data inversion model was developed in order to evaluate the atmospheric influence on soil CO2 emissions.
DE: 1094 Instruments and techniques
DE: 8419 Eruption monitoring (7280)
DE: 8494 Instruments and techniques
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2003 Fall Meeting