TY JOUR TI Comparison of formation conditions of secondary aerosol particles in boreal forests of Southern Finland and Siberia KW secondary aerosol particles KW boreal forests KW Southern Finland KW Siberia JO Russian Journal of Earth Sciences AU Lyubovtseva, Y.S. AU Zagaynov, V.A. AU Khodzher, T.V. AU Kulmala, M.. AU Boy, M.. AU Dal Maso, M.. AU Junninen, H.. AU Obolkin, V.A. AU Potyomkin, V.L. AU Biryukov, Y.G. AU Lushnikov, A.A. PY 2010 IS 11 PB Geophysical Center of the Russian Academy of Sciences