We present here some results of many-year integrated studies of atmospheric aerosols in Novosibirsk region (from 1992 to 1995) along with the first observational data for Krasnoyarsk Territory and the northern part of West Siberia (1995). Data include size spectra, aerosol particle number and mass densities, ion composition, light scattering characteristics and multielement composition of individual particles. Methods and instrumentation used are described. Comparison of spatiotemporal aerosol characteristics is performed. It is concluded that the integrated study of atmospheric aerosols helps to better understand the mechanisms of local-, regional-, and global-scale aerosol formation and estimate the powers of contributing sources.