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| Titel |
ETNAGAS Soil gas network on Mt. Etna (Italy) - time variations of CO2 soil flux during last 5 years |
| VerfasserIn |
Marco Liuzzo, Gaetano Giudice, Giovanni Giuffrida, Angela Giuffrida Privitera, Sergio Gurrieri |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250033275
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| Zusammenfassung |
| ETNAGAS Soil gas network on Mt. Etna (Italy) -
time variations of CO2 soil flux during last 5 years
M. Liuzzo (1), G. Giudice (1), G. Giuffrida (1),
A. Giuffrida Privitera (1), S. Gurrieri (1)
(1) INGV, Sezione di Palermo, Palermo, Italy
m.liuzzo@pa.ingv.it / Fax : 39 091 6809449
Measure of CO2fluxes diffused from the soil (Φ CO2) released from active volcanoes
brings profound insights into our understanding of volcanic processes, as a matter of fact
strong CO2 soil flux variations were recorded before and during the last eruptions on Mt.
Etna. In order to further our understanding of the volcano dynamics concerning soil’s
degassing, a network for measuring geochemical parameter (ETNAGAS) stations was
installed on the flanks of Mt. Etna. This network contributes to volcano monitoring since
December 2002. Today, ETNAGAS consists of 19 automatic stations located close to the
main volcanic structures of the Mt. Etna, in areas of the volcano characterized by strong soil
CO2emissions. The monitoring stations of the network were entirely developed
by the INGV at Palermo; they are able to monitor different parameters, such as
CO2 (eventually CH4) soil flux, T, P, rain, Rh, wind speed and wind direction, and
data are acquired at hourly intervals. The soil CO2flux measuring system follows
the principles proposed by Gurrieri and Valenza (Gurrieri & Valenza 1988) which
is based on CO2content in a mixture of air and soil gas (dynamic concentration,
Cd).
A multi network management software has also been developed in order to
allow stations handling and data elaboration. The software was developed for a
LINUX environment and consists of several modules for data acquisition, processing,
visualization and early warning generation. The remote stations are connected by radio
modem and/or GSM modem to the Geochemical monitoring laboratory of the INGV
at Palermo, where data are real-time processed and used for surveillance of the
volcano.
We report here on the very large Φ CO2variations recorded by the above network during
the last 5 years during eruptive periods, in particular we show the results about the 2004-2005
and 2006 eruptions on Mt. Etna.
These results suggest the importance of continuously monitoring the CO2emitted from
soil to the surveillance of volcanic activity in this area, and open up an interesting scenario
for the surveillance of this volcano. |
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