CO2 output discharged from Stromboli Island (Italy)

Abstract Total CO 2 output from soil gas and plume, discharged from the Stromboli Island, was estimated. The CO 2 emission of the plume emitted from the active crater was estimated on the basis of the SO 2 crater output and C/S ratio, while CO 2 discharged through diffuse soil emission was quantified on the basis of 419 measurements of CO 2 fluxes from the soil of the whole island, performed by using the accumulation chamber method. The results indicate an overall output of ≅ 416 t day − 1 of CO 2 from the island. The main contribution to the total CO 2 output comes from the summit area (396 t day − 1 ), with 370 t/day from the active crater and 26 t day − 1 from the Pizzo sopra La Fossa soil degassing area. The release of CO 2 from peripheral areas is ≅ 20 t day − 1 by soil degassing (Scari area mainly). The result of the soil degassing survey confirms the persistence of the highest CO 2 degassing areas located on the North-East crater side and Scari area.