Generation of secondary organic aerosols on needle surfaces and their entry into the winter forest canopy under radiometric photophoresis
M.P. Tentyukov1,2, B.D. Belan1, D.V. Simonenkov1, V.I. Mikhailov3
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2Pitirim Sorokin Syktyvkar State University, Syktyvkar, Russia
3Institute of Chemistry of the Komi Science Centre of the Ural Division RAS, Syktyvkar, Russia
Keywords: dynamic light scattering, UV spectrometry, efflorescence, polyphenols, secondary organic aerosols, radiometric photophoresis, needles, winter
Abstract
The results of the laser granulometry of nanosize fraction of precipitated aerosols and UV spectrometry of water washes from the surfaces of needle of different age of four species of forest-forming plant species are analyzed. The phenolic compounds efflorescence activity on the needle surfaces is assessed for the period of winter dormancy of plants. A possibility of the secondary organic aerosols geeration as a result of photoactivated reactions between phenolic compounds and a precipitated aerosol substance has been shown. The possibility of secondary organic aerosols entering the winter forest canopy under the radiometric photophoresis is discussed. It is assumed that secondary aerosols photophoresis in the field of IR from the snow cover surface (“snow” photophoresis) can significantly affect the vertical transfer of secondary organic aerosols in the winter coniferous forest canopy.
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