Author contributions
Ar.D and M.L. conceptualization and full responsibility over the manuscript; L.B., C.C., Ar.D. drafted the initial manuscript; L.B. and C.C. data analysis and preparation of tables and figures; Ad.D. statistical analysis; M.P., M.R. analysis of HR-ToF-AMS data; F.S. and V.P. analysis of MetOne data and responsible for Arpae Air Quality measurements; Ar.D., L.B., C.C., Ad.D, M.P., M.R., M.G., F.S., V.P., M.F., M.L., equal contribution to overview/editing of the manuscript.