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Natural (volcanic activity, desert dust storms) and anthropogenic (fuel combustion, biomass burning etc.) aerosols play an important role in climate changes, as they influence the solar radiation balance on Earth through light scattering and absorption processes. Additionally, both natural (e.g. Saharan dust) and anthropogenic (urban -traffic/industrial from big agglomerations aerosols) are acting as a trigger of the regional meteorology and weather forecast. This paper summarizes the temporal and vertical variation of mixed aerosol mass concentration near Bucharest, based on experimental data collected in the 2012 EMEP/PEGASOS campaign. From the series of experimental data collected we emphasize two cases, one for large biomass burning and one for a typical Saharan storm reaching the outskirts of Bucharest. The vertical mass concentrations profiles were determined based on the measurements performed with a multiwavelength depolarization Raman lidar. To assess the aerosol mass concentration using these lidar data, the authors are using the method proposed by Tesche et al., combined with forward simulations (i.e. OPAC). The results may contribute to describe, in an improved manner, the contribution of the mixed aerosols (low-or/and high-depolarizing particles) in the atmospheric simulations and models. It can also be used for operational purposes, such as near real time assessment of aerosol load (e.g. volcanic ash).