Abstract
An Eulerian model for passive gas dispersion based on the K-theory for turbulent diffusion, coupled with a mass consistent wind model is presented. The procedure can be used to forecast gas concentration over large and com- plex terrains. The input to the model includes the topography, wind measurements from meteorological stations, atmospheric stability information and gas flow rate from the ground sources. Here, this model is applied to study the distribution of the CO2 discharged from the hot sources of the Solfatara Volcano, Naples, Italy, where the in- put data were measured during a 15 day campaign in June 2001 carried out to test an Eddy Covariance (EC) sta- tion by Osservatorio Vesuviano-INGV, Naples.
Highlights
Many volcanic and non-volcanic areas in Italy emit a huge amount of gas into the atmosphere
One of the most frequent gases discharged from both volcanic (e.g., Solfatara volcano) and non-volcanic sources (e.g., Central Italy vents), is carbon dioxide (CO2) which has a molecular weight greater air
We show the results of the simulations in two different cases of atmospheric stability
Summary
Many volcanic and non-volcanic areas in Italy emit a huge amount of gas into the atmosphere. Low wind conditions are rarely recorded at Solfatara (during the last six years daily average wind intensity w>1 m/s were 75% of the total and the cases with w
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