Fig. 17: Seasonal evolution of concentrations of negative ions.
From: Understanding atmospheric processes: insights from the comparison between Beijing and Hyytiälä
The negative ions in the size range 2.0‒2.3 nm in Beijing (red) and Hyytiälä (blue) are shown. The shaded areas are 75/25 percentiles. The hourly mean datasets from 2018 to 2022 were used.
