M. P. Tentyukov, B. D. Belan, D. V. Simonenkov, S. A. Patov, V. I. Mikhailov, G. V. Simonova, S. N. Plyusnin, Yu. A. Bobrov
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Lichen Exometabolites as Possible Precursors of Secondary Organic Aerosols
Lichens are not only a bioindicator of air pollution; they also affect the chemical composition of air. The qualitative composition of exometabolites in thalli of epiphytic lichens is studied using high-performance liquid chromatography. The comparative analysis of the fractional composition of deposited aerosol matter in water washouts of lichens shows it to be characterized by a bimodal particle distribution. It is postulated that the appearance of the fine fraction is associated with the generation of secondary organic aerosols on the surface of epiphytic lichens. Their precursors are the products of photoactivated reactions between deposited aerosol matter and highly volatile organic compounds which arrive on the lichen surface as a result of efflorescence. The mechanism of entry of secondary organic aerosols into the surface air layer under the radiometric photophoresis effect is discussed.
期刊介绍：
Atmospheric and Oceanic Optics is an international peer reviewed journal that presents experimental and theoretical articles relevant to a wide range of problems of atmospheric and oceanic optics, ecology, and climate. The journal coverage includes: scattering and transfer of optical waves, spectroscopy of atmospheric gases, turbulent and nonlinear optical phenomena, adaptive optics, remote (ground-based, airborne, and spaceborne) sensing of the atmosphere and the surface, methods for solving of inverse problems, new equipment for optical investigations, development of computer programs and databases for optical studies. Thematic issues are devoted to the studies of atmospheric ozone, adaptive, nonlinear, and coherent optics, regional climate and environmental monitoring, and other subjects.
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