Publication Date:
2017-04-04
Description:
Carbon dioxide flux from the soil is regularly monitored
in selected areas of Vesuvio and Solfatara (Campi Flegrei,
Pozzuoli) with the main aim of investigating if the
surface phenomena could provide information about
the processes occurring at depth. Surveyed areas include
15 fixed points around the rim of Vesuvio and 71
fixed points in the floor of Solfatara crater, where soil
CO2 flux is measured since 1998, at least once a month.
In addition, two automatic permanent stations, located
at Vesuvio and Solfatara, continually measure the CO2
flux and some environmental parameters that can potentially
influence the CO2 diffuse degassing.
We analysed, with statistical procedures, the feature
of the acquired signals, evaluating the spatial and temporal
variations of the CO2 degassing process.
Series acquired by continuous stations are characterized
by an annual periodicity that is related to the
typical periodicities of some meteorological parameters
(e.g., air temperature, air humidity, etc.). Such a kind of
signal permits to define the “reference” level of the CO2
degassing process that diffusely affects the flanks and
the base of the volcanoes.
Conversely, series of CO2 flux data arising from periodic
measurements over the arrays of Vesuvio and
Solfatara, are less dependent on external factors such
as meteorological parameters, local soil properties (porosity,
hydraulic conductivity) and topographic effects
(high or low ground). Therefore we argue that the longterm
trend of this signal contains the “best” possible
representation of the endogenous signal related to the
upflow of deep hydrothermal fluids. At Vesuvio and Solfatara,
the variations of these series have shown some correspondence with other physical changes of the volcanic systems.
Description:
Published
Description:
Puerto de la Cruz, Tenerife (Canary Islands,Spain)
Description:
1.2. TTC - Sorveglianza geochimica delle aree vulcaniche attive
Description:
open
Keywords:
carbon dioxide
;
Vesuvio
;
Campi Flegrei
;
04. Solid Earth::04.04. Geology::04.04.11. Instruments and techniques
;
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
;
04. Solid Earth::04.08. Volcanology::04.08.01. Gases
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
Abstract
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