About seasonal dynamics of the vertical profiles of single scattering albedo of submicron aerosol in the lower troposphere

Analysis of the vertical profiles of the concentrations of aerosol and soot obtained in 1999-2002 in the troposphere of West Siberia up to 7 km is carried out. The peculiarities of the dynamics of the single scattering albedo (SSA) and the relative content of soot (RCS) for dry aerosol are studied. The year-to-year stability of the vertical profiles and their seasonal dynamics is observed. The values of albedo increase mainly with height that is caused by the decrease of RCS. Significant seasonal variability of the vertical profiles is observed, closely related to temperature stratification of the boundary layer of the atmosphere. The greatest dynamics of the albedo is observed in cold season. In fall-winter seasons albedo varies with height from 0.75 to 0.98, the respective variations of RCS are from 0.15 to 0.01. The greatest variations of the aerosol absorption characteristics with height are observed at the heights below I km. In warm season the ranges of variations of albedo narrow to 0.9-0.98, and the range of RCS becomes 0.06-0.01. Seasonal differences in the albedo and the relative content of soot are mainly observed in the lower layer of the troposphere below I kin. Seasonal differences at the heights above 1 km are weakly pronounced.