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Authors: D'Alessandro, W.*
Editors: Martin-Duque, J.F.; Universidad Complutense Spain
Brebbia, Carlos A.; Wessex Insitute of Technology U.K.
Emmanouloudis, D.E.; Technological Educational Institute of Kavala Greece
Mander, U.; University of Tartu Estonia
Title: Gas hazard: an often neglected natural risk in volcanic areas
Issue Date: 2006
ISBN: 1746-448X
Keywords: Gas hazard
Carbon dioxide
Sulphur gases
Abstract: Volcanic areas release huge amounts of gases, which apart from having important influences on the global climate could have strong impact on human health. Gases have both acute and chronic effects. Carbon Dioxide and Sulphur gases are the main gases responsible for acute mortality due to their asphyxiating and/or toxic properties. On the contrary Mercury and Radon have important chronic effects respectively for its toxicity and radioactivity. The problem has long been neglected until the “Lake Nyos” catastrophe in 1986, in which about 1700 people were killed by a volcanic CO2 emission, attracted the worldwide attention of the mass media. In this paper we present some studies on gas hazard in three different volcanic systems chosen for their different activity status: Mt. Etna (Italy), characterised by frequent activity with a mean CO2 emission of about 450 kg s-1; Pantelleria island (Italy) at present in quiescent status and a CO2 emission of about 12 kg s-1; and Sousaki (Greece) a recent (Quaternary) but now extinct volcano with a CO2 emission of about 0.6 kg s-1. In all three systems the main problems arise from CO2 emissions while secondary problems are due to SO2 and Hg (Etna), H2S (Sousaki) and Rn (Pantelleria).
Appears in Collections:Book chapters
04.08.01. Gases
04.08.08. Volcanic risk
04.04.12. Fluid Geochemistry

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