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Authors: Pedone, Maria* 
Granieri, Domenico* 
Moretti, Roberto* 
Fedele, Alessandro* 
Troise, Claudia* 
Somma, Renato* 
De Natale, Giuseppe* 
Title: Improved quantification of CO 2 emission at Campi Flegrei by combined Lagrangian Stochastic and Eulerian dispersion modelling
Issue Date: 23-Sep-2017
Series/Report no.: /170 (2017)
DOI: 10.1016/j.atmosenv.2017.09.033
Abstract: This study investigates fumarolic CO2 emissions at Campi Flegrei (Southern Italy) and their dispersion in the lowest atmospheric boundary layer. We innovatively utilize a Lagrangian Stochastic dispersion model (WindTrax) combined with an Eulerian model (DISGAS) to diagnose the dispersion of diluted gas plumes over large and complex topographic domains. New measurements of CO2 concentrations acquired in February and October 2014 in the area of Pisciarelli and Solfatara, the two major fumarolic fields of Campi Flegrei caldera, and simultaneous measurements of meteorological parameters are used to: 1) test the ability of WindTrax to calculate the fumarolic CO2 flux from the investigated sources, and 2) perform predictive numerical simulations to resolve the mutual interference between the CO2 emissions of the two adjacent areas. This novel approach allows us to a) better quantify the CO2 emission of the fumarolic source, b) discriminate “true” CO2 contributions for each source, and c) understand the potential impact of the composite CO2 plume (Pisciarelli “plus” Solfatara) on the highly populated areas inside the Campi Flegrei caldera.
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