CO2 flux and Rn activity were continuously measured for 4 years on Stromboli NE flank.
CO2 flux and Rn are affected by environmental parameters (soil H and T, wind, air T).
Two statistical methods were used to identify and remove atmospheric effects on gas.
In the reference period no deep gas-rich magma was involved in the eruptive activity.
No clear correlation was found between volcanic activity and CO2 and radon emissions.