In this work, we analyze an episode of high aerosol optical thickness (AOT) values coinciding with an unusually elevated planetary boundary layer (PBL) over southern Poland during August 2015 (Fig. 1). Our goal is to determine the types and source regions of aerosols observed over the station. To this end, we utilize a recently developed scheme for analyzing sunphotometer optical aerosol data supported by backward trajectories calculated based on an atmospheric model. The performance and usefulness of the scheme was previously tested on data obtained at our measurement station at Belsk, Poland. In this study, we expand the scheme to incorporate ceilometer data. This allows for vertical analysis of aerosol content with a main focus on the height of the PBL and detection of aerosol layers in the free troposphere. The scheme is applied to data obtained at an automatic (i.e., unmanned) station in Raciborz (50.09°N, 18.19°E), Poland, equipped with both sunphotometer and a ceilometer. Satellite data on AOT and wildfires are then used to validate the credibility of the candidate source regions. The proposed scheme seems to be best suited for studying short- to mid-range intracontinental transport. To determine the usability of the proposed approach for a long-range aerosol transport, we analyze an event of transatlantic transport, which, while visible as thin layers in the ceilometer signals, did not significantly influence the observed columnar AOT.