Science news

FMI's researchers publish about 350 peer-reviewed articles annually.

In Science News we publish current information about FMI's studies on the weather, the sea and the climate.

A new review focuses on nanoparticles in urban traffic-influenced areas

A new review focuses on nanoparticles in urban traffic-influenced areas

A recently published review focuses on the sources, composition, physical characteristics and formation of nanoparticles in traffic-influenced environments.

Elevated number concentrations of atmospheric nanoparticles are very typically observed in traffic-influenced environments. These particles are directly emitted to atmosphere or they are formed in the atmosphere via nucleation from initially gaseous precursors.

The review, made by researchers from Tampere University and Finnish Meteorological Institute, combines the current scientific information regarding primary exhaust nanoparticles emitted by vehicles and engines and regarding changes in exhaust nanoparticle concentration, size and composition when initially gaseous compounds form new particles or condense to existing particles during exhaust dilution and cooling processes.

The review combines this information with the observations made in roadside measurements of urban aerosols, aiming to form a comprehensive overview of nanoparticle emissions related issues. A special attention is paid on the links between atmospheric nanoparticles and health effects and topics where more research is needed.

Further information:

Senior researcher Hilkka Timonen, Finnish Meteorological Institute, tel. +358 50 380 2864,

Associate professor Topi Rönkkö, Tampere University, tel. +358401981019,

Reference: Rönkkö, T., and Timonen, H.: Overview of Sources and Characteristics of Nanoparticles in Urban Traffic-Influenced Areas, Journal of Alzheimer's Disease, 1-14, 10.3233/jad-190170, 2019.

Science news archive