Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8764
Authors: Boatta, F.* 
D'Alessandro, W.* 
Gagliano, A. L.* 
Liotta, M.* 
Milazzo, M.* 
Rodolfo-Metalpa, R.* 
Hall-Spencer, J. M.* 
Parello, F.* 
Title: Geochemical survey of Levante Bay, Vulcano Island (Italy), a natural laboratory for the study of ocean acidification
Journal: Marine pollution bulletin 
Series/Report no.: 2/73 (2013)
Publisher: Elsevier Science Limited
Issue Date: Aug-2013
DOI: 10.1016/j.marpolbul.2013.01.029
URL: http://www.sciencedirect.com/science/article/pii/S0025326X13000441
Keywords: ocean acidification
carbon capture and storage
marine geochemistry
carbonate saturation state
volcanic vents
carbon dioxide
Subject Classification03. Hydrosphere::03.04. Chemical and biological::03.04.01. Biogeochemical cycles 
03. Hydrosphere::03.04. Chemical and biological::03.04.02. Carbon cycling 
03. Hydrosphere::03.04. Chemical and biological::03.04.03. Chemistry of waters 
03. Hydrosphere::03.04. Chemical and biological::03.04.04. Ecosystems 
03. Hydrosphere::03.04. Chemical and biological::03.04.05. Gases 
03. Hydrosphere::03.04. Chemical and biological::03.04.06. Hydrothermal systems 
Abstract: Shallow submarine gas vents in Levante Bay, Vulcano Island (Italy), emit around 3.6t CO2 per day providing a natural laboratory for the study of biogeochemical processes related to seabed CO2 leaks and ocean acidification. The main physico-chemical parameters (T, pH and Eh) were measured at more than 70 stations with 40 seawater samples were collected for chemical analyses. The main gas vent area had high concentrations of dissolved hydrothermal gases, low pH and negative redox values all of which returned to normal seawater values at distances of about 400 m from the main vents. Much of the bay around the vents is corrosive to calcium carbonate; the north shore has a gradient in seawater carbonate chemistry that is well suited to studies of the effects of long-term increases in CO2 levels. This shoreline lacks toxic compounds (such as H2S) and has a gradient in carbonate saturation states.
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