1. Origin of secondary fatty alcohols in atmospheric aerosols in a cooltemperate forest based on their mass size distributions.
- Author
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Yuhao Cui, Eri Tachibana, Kawamura, Kimitaka, and Yuzo Miyazaki
- Subjects
FATTY alcohols ,SPRING ,AUTUMN ,ATMOSPHERIC aerosols ,SECONDARY forests ,MICROBIOLOGICAL aerosols ,AEROSOL sampling ,DECIDUOUS forests ,BEE pollen - Abstract
Fatty alcohols (FAs) are major components of surface lipids in plant leaves and serve as surface-active organic aerosols (OAs), which can act as primary biological aerosol particles (PBAPs). To elucidate the origin and formation of secondary fatty alcohols (SFAs) in atmospheric aerosols, their mass size distribution in aerosol samples obtained from a deciduous forest canopy was measured in spring, summer, and autumn. The SFAs showed the highest concentration in spring (growing season), with n-nonacosan-10-ol being the most abundant. In spring and summer, the size peak of n15 nonacosan-10-ol was in particle size range >10.0 µm, whereas it was in the 1.9-3.0 µm range in autumn. The size distribution of n-nonacosan-10-ol did not show any significant correlation with that of the known biogenic tracers of pollen, soil, and fungal spores in spring and summer. The overall results, together with SFAs measured in plant leaves, as well as the literature, suggest that SFAs originate mostly from plant waxes, and that leaf senescence status is likely an important factor controlling the size distribution of SFAs. This study provides new insights into the possible sources of PBAPs and their effects on the ice nucleation activity of aerosols based on seasonal changes in particle size. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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