We study the annual behavior of the concentration of organic components of the atmospheric aerosol, sampled onboard the Tu-134 Optik airborne laboratory in the atmospheric layer of 500-8500 m. The concentration of the organic component in aerosol composition is found to be maximal during spring and minimal during fall. Compounds ranging from C₈H₁₈ to C₃₅H₇₂ are detected in the composition of aerosol particles. The range of hydrocarbons is the widest during the winter period (C₁₂H₂₆-C₃₅H₇₂) and during spring (C₈H₁₈-C₃₁H₆₄), and it is markedly narrower during summer (C₁₈H₃₈-C₃₃H₆₈) and during fall (C16H34-C31H64). One mode (n-alkane C₂₀H₄₂) predominates in aerosol composition throughout the year.