Formation and growth of fresh atmospheric aerosols: eight years of aerosol size distribution data from SMEAR II, Hyytiälä, Finland

🤖 Plain-English Summary

We analyzed size distributions measured continuously at a boreal forest measurement site at Hyytiälä, Finland between 1996 and 2003. The mean growth rate was 3.0 nm h–1, peaking in summer.

🔑 Key Findings

• From the eight-year data we identified days when new aerosol particle formation was taking place as well as days when no formation was detected, removing days with ambiguous status.
• The event days were then classified based on whether it was possible to determine formation and growth rates of new particles.
• These characteristics were then calculated.

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