CIAO main upgrade: building up an ACTRIS-compliant aerosol in situ laboratory

This dataset is related to the paper that describes the aerosol in situ laboratory at the CNR-IMAA (Consiglio Nazionale delle Ricerche – Istituto di Metodologie per l’Analisi Ambientale) Atmospheric Observatory (CIAO) in southern Italy, outlining its configuration and detailing each instrument and sampling line.