The main objective of proposed research is the study of atmospheric pollution in Northern Greece due to the presence of aerosol particles. The research is focusing on the determination of the aerosol optical attributes, the identification of their sources and the study of the medium and big scale aerosol transport in the troposphere. The latitudinal and longitudinal distribution of aerosol particles has important environmental repercussions that are highly related to the quality of life and climatic change in local and world scale. Following the contemporary way to tackle the study of regional pollution, the determination of attributes of transported aerosol particles requires the synergistic use of numerical models, ground-based measurements and satellite observations. The study is based on high quality of measurements of aerosol particles using remote sensing methods (lidar and sunphotometers) as well as in the analysis of satellite observations of the spatial and temporal aerosol load distribution in regional and inter-continental scale. Particular importance is given in the recording of gaseous emissions in a regional scale and the study of transport of pollutant gases that are considered tracers for the aerosol particles, as well as in the detection of origin of the aerosol particles arriving over Northern Greece with the use of general circulation numerical models.