Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/412
AuthorsCarapezza, M. L.* 
Granieri, D.* 
TitleCO2 soil flux at Vulcano (Italy): comparison between active and passive methods
Issue Date2004
Series/Report no.19
DOI10.1016/S0883-2927(03)00111-2
URIhttp://hdl.handle.net/2122/412
KeywordsVulcano
CO2
Carbon dioxide
Subject Classification04. Solid Earth::04.02. Exploration geophysics::04.02.07. Instruments and techniques 
04. Solid Earth::04.08. Volcanology::04.08.07. Instruments and techniques 
AbstractCarbon dioxide soil flux has been used for many years to monitor Italian active volcanoes and both the active Dynamic Concentration (DCM) and the passive Accumulation Chamber (ACM) methods are employed. These two methods have been compared by means of 218 simultaneous flux measurements carried out in the La Fossa area of Vulcano Island, where a large variation of CO2 soil release occurs. Results indicate that DCMoverestimates CO2 flux and is proportional to it only in high flux zones (flux higher than 100 gm 2 day 1). UsingACMfluxes and the Stefan–Maxwell equation, the measured CO2/depth curves in the soil could be reproduced. In high flux points CO2 is transported mostly by viscous flow up to a very shallow depth and then by diffusive flow, which is the dominant gas transport mechanism in low flux points. Carbon dioxide soil flux values are controlled by proximity to active gas releasing fractures, by changes in the barometric pressure and by variations in soil permeability.
Appears in Collections:Manuscripts
Papers Published / Papers in press
Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Carapezza.pdf582.12 kBAdobe PDFView/Open    Request a copy
applied geochemistry.htmRedirect - applied geochemistry493 BHTMLView/Open
Show full item record

Page view(s)

102
checked on May 26, 2017

Download(s)

39
checked on May 26, 2017

Google ScholarTM

Check

Altmetric