TY - JOUR

T1 - Subpollen Particles as Atmospheric Cloud Condensation Nuclei

AU - Mikhailov, E. F.

AU - Ivanova, O. A.

AU - Nebosko, E. Yu.

AU - Vlasenko, S. S.

AU - Ryshkevich, T. I.

PY - 2019/7/1

Y1 - 2019/7/1

N2 - Bioparticles constitute a significant fraction of atmospheric aerosol. Their size range varies from nanometers (macromolecules) to hundreds of micrometers (plant pollen and vegetation residues). Like other atmospheric aerosol particles, the degree of involvement of bioaerosols in atmospheric processes largely depends on their hygroscopic and condensation properties. This paper studies the ability of subpollen particles of pine, birch, and rape to serve as cloud condensation nuclei. Secondary particles are obtained by the aqueous extraction of biological material from pollen grains and the subsequent solidification of atomized liquid droplets. The parameters of cloud activation are determined in the size range of 20–270 nm and water-vapor supersaturations of 0.1–1.1%. Measurement data were used to determine the hygroscopicity parameter that characterizes the effect of the chemical composition of subparticles on their condensation properties. The hygroscopic parameter varies in the range from 0.12 to 0.13. In general, the results of measurements have shown that the condensation activity of subpollen particles is comparable with the condensation activity of secondary organic aerosols and depends weakly on the type of primary pollen.

AB - Bioparticles constitute a significant fraction of atmospheric aerosol. Their size range varies from nanometers (macromolecules) to hundreds of micrometers (plant pollen and vegetation residues). Like other atmospheric aerosol particles, the degree of involvement of bioaerosols in atmospheric processes largely depends on their hygroscopic and condensation properties. This paper studies the ability of subpollen particles of pine, birch, and rape to serve as cloud condensation nuclei. Secondary particles are obtained by the aqueous extraction of biological material from pollen grains and the subsequent solidification of atomized liquid droplets. The parameters of cloud activation are determined in the size range of 20–270 nm and water-vapor supersaturations of 0.1–1.1%. Measurement data were used to determine the hygroscopicity parameter that characterizes the effect of the chemical composition of subparticles on their condensation properties. The hygroscopic parameter varies in the range from 0.12 to 0.13. In general, the results of measurements have shown that the condensation activity of subpollen particles is comparable with the condensation activity of secondary organic aerosols and depends weakly on the type of primary pollen.

KW - биоаэрозоль, субчастицы, конденсационная активность аэрозолей, спектрометр облачных ядер активации, параметр гигроскопичности

UR - http://www.scopus.com/inward/record.url?scp=85070772430&partnerID=8YFLogxK

U2 - 10.1134/S000143381904008X

DO - 10.1134/S000143381904008X

M3 - Article

AN - SCOPUS:85070772430

VL - 55

SP - 357

EP - 364

JO - Izvestiya - Atmospheric and Oceanic Physics

JF - Izvestiya - Atmospheric and Oceanic Physics

SN - 0001-4338

IS - 4

ER -