Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7951
AuthorsMadonia, P.* 
Belanca, A.* 
Di Pietro, R.* 
Mirabello, L.* 
TitleThe role of near-surface cavities in the carbon dioxide cycle of karst areas: evidence from the Carburangeli Cave Natural Reserve (Italy)
Issue DateMay-2012
Series/Report no./67 (2012)
DOI10.1007/s12665-012-1693-0
URIhttp://hdl.handle.net/2122/7951
KeywordsAtmosphere Carbon dioxide Cave Drip waters Karst
Subject Classification03. Hydrosphere::03.02. Hydrology::03.02.03. Groundwater processes 
AbstractHydrological, chemical and meteorological data collected during the years 2006–2007 at Carburangeli Cave (Italy) have provided new insights on the nearsurface cycle of carbon dioxide, particularly concerning the role played by fractures and karst conduits. Carbon dioxide is trapped in the underground atmosphere essentially when its temperature is lower than the outer one. By contrast, convective air circulation disperses all the excess CO2 in the external environment when the thermal differential is inverted. The network of fractures and karst conduits then works, in the vadose zone, as a re-circulator of CO2 from the soil to the atmosphere. The total amount of CO2 fixed in the underground is controlled, during the wet season, by the amount of infiltrating waters, which act as the main carrier of CO2 in the subsoil. By contrast, during the dry season, gravitational drainage is responsible for the accumulation of carbon dioxide in the underground voids. The quantitative balance demonstrated that the degassed CO2 amounts are one order of magnitude higher than the dissolved CO2. In light of this, if the near-surface outgassing processes are not taken into account, CO2 budgets may be affected by significant errors.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
CAVE-Carburangeli-EES-Authorcopy.pdf1.29 MBAdobe PDFView/Open    Request a copy
Show full item record

Page view(s)

142
checked on Apr 29, 2017

Download(s)

36
checked on Apr 29, 2017

Google ScholarTM

Check

Altmetric