CLARA (Aerosol climatology – from remote sensing measurements to deep learning) goal is to develop an advanced aerosol climatology for Romania, starting from a pilot region centered on Bucharest area, covering the full period (2010 – present) of aerosol remote sensing and in-situ measurements from Romanian Atmospheric Research 3D Observatory (RADO, https://erris.gov.ro/RADO), Bucharest-Magurele, using an expert analysis complemented with state-of-the-art deep learning (DL) techniques. The RADO measurements for this area will be supplemented by satellite measurements and improved modelling results.