During 2001-2006, spectral polarimeter and nephelometer measurements of mass concentration of near-surface submicron aerosol М and its condensation activity , were conducted at the Zvenigorod Scientific Station of IAP RAS. Variations in the above parameters at scales from several days to several months were analyzed. It is shown that there were more episodes of dense and super-dense hazes in Central Russia for these years. This has resulted in the change in the character of the aerosol mass concentration, М, in such a way that oscillations with increasing from-year-to-year amplitude appeared in the annual variation of М. Just due to more frequent episodes of dense and super-dense hazes in 2002-2006, a significant steady increase in the annual mean values of M is recorded. The annual mean value of M in 2006 increased more than twice as compared to 2001 (from 23 to 62 μg/m3).