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Evolution of UFP-series

The series of symposia on Ultrafine particles, hosted by EFCA Member GUS e.V., is being developed in tight cooperation between the Karlsruhe Institute of Technology and EFCA since 2007. 

Ultrafine particles 1 and 2

Ultrafine particles  1

Key in the Issue of Particulate Matter?

Forschungszentrum Karlsruhe, Germany, 11-12 June 2007

What do we have to know to answer the title question?

The first UFP-symposium provided an overview of on-going research on sources, ambient levels, atmospheric behaviour, health effects and actual mechanisms which are responsible for damage in living tissues. In spite of many open question the policy relevance of the UFP-issue became apparent.  


Ultrafine particles 2

Sources, Effects, Risks and Mitigation Strategies.
Brussels 19-20 May 2009.

A stronger basis for addressing ultrafine particles

With the second UFP-symposium the series moved to Brussels and so connected with European policymakers. Assessment of epidemiological research showed higher associations with ultrafine particles in comparison to PM2.5; mechanisms cannot be detailed precisely. A speaker on behalf of the European Commission hinted that the revision of the Air Quality Directive in 2013 would give an opportunity for UFP-regulation. Download Conference report

Group picture (click to enlarge)




Ultrafine particles 3 and 4

Ultrafine particles  3

Sources, Effects, Risks and Mitigation Strategies Conference Brussels, 26-27 May 2011

What are the right metrics for Particulate Matter?

At the third symposium time seemed to be ripe to reconsider the ongoing development of PM policy with its gradual development of regulating smaller size fractions and consider alternatives in a discussion on the Metrics of Particulate Matter. The outcome formed the basis for EFCA’s Policy Initiative no. 3 on Black Carbon Particles (2012). 




Ultrafine particles  3

Sources, Effects, Risks and Mitigation Strategies Conference

Brussels, 16-17 May 2013

Exploring chemical composition of ultrafine particles

The fourth symposium included addressing the chemical composition of ultrafine particles and the relevance of atmospheric conversions of its fractions for immediate and long-term health effects. Health effects were reviewed and included a novel association between UFP and Alzheimer for which an olfactory mechanism was proposed.


Ultrafine particles 5

Ultrafine particles 5

Air Quality and Climate

Brussels, 4-5 May 2015

Addressing the organic fraction of particles

At the fifth symposium the phenomenon of atmospheric nucleation was addressed. It was shown to be a crucial factor when describing particulate air pollution as well as processes which control climate. It confirmed that attention is to paid to size fractions down to the nanometer scale of particulate matter and their chemical composition. In particular, the need to focus on secondary organic aerosols and underlying processes for their formation was stressed, as well as development of the poor data collection.