Long-Term Sub-3nm Particle and Precursor Gas Measurements in the Boreal Forest

Over five years of particle concentration data and three years of precursor vapor measurements from the SMEAR II station in Hyytiälä, Finland. The dataset, created by Juha Sulo from the University of Helsinki, captures sub-3nm particle dynamics and seasonal variations in sulfuric acid and highly oxygenated organic molecules (HOMs).

Use Cases

• Modeling new particle formation pathways based on correlations between sub-3nm particles and precursor vapors like sulfuric acid and HOMs.
• Analyzing diurnal and seasonal patterns in aerosol precursor concentrations, such as HOM monomers and dimers.
• Investigating the impact of photochemical and biogenic activity on particle concentrations in the 1.1–1.7 nm and 1.7–2.5 nm size classes.

Strengths

• Long-term measurement covering over five years for particle concentrations.
• Includes three years of precursor vapor data from a Chemical Ionization Atmospheric Pressure Interface Time-of-Flight mass spectrometer (CI-APi-ToF).
• Data is from the well-established SMEAR II station, a key site for atmospheric research.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

University of Helsinki

Collection Method

Measured with a Particle Size Magnifier (PSM) and a Chemical Ionization Atmospheric Pressure Interface Time-of-Flight mass spectrometer (CI-APi-ToF).

Time Range

Over five years for particle data; three years for precursor vapor data.

Geography

SMEAR II station in Hyytiälä, Finland (boreal forest).