Dynamics of the concentration of atmospheric ions according to measurements at the Fonovaya observatory
M.Yu. Arshinov, B.D. Belan, S.B. Belan, D.K. Davydov
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: atmosphere, air, ion, concentration, annual variation, daily cycle, unipolarity coefficient, nanoparticle, neutral particle, nucleation
Abstract
Atmospheric ions play an important role in the formation of aerosol particles and affect public health. At the same time, measurements of their concentration in Russia are extremely insufficient. To fill the gap, the Fonovaya observatory began monitoring the ion content in July 2019. Analysis of the data obtained showed that from July 2019 to May 2024, the concentrations of both positive and negative aeroions were in the range 220-720 cm-3. Negative ions have a trend of +7%/year, and positive ions have a trend of -1.2%/year. Ions of both signs have a pronounced annual cycle with a maximum in summer and a minimum in winter. The long-term average daily cycle revealed that the concentrations of ions of both signs change synchronously. The minimum of their concentration is observed in the morning hours and the maximum in the afternoon. The results allow us to clarify the role of ions in atmospheric processes.
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