Atmospheric Chemistry: Spectroscopic and Photo-Reaction Chamber Studies


报告题目:Atmospheric Chemistry: Spectroscopic and Photo-Reaction Chamber Studies

报告人:Prof. Wolfgang Jäger (University of Alberta, Edmonton, AB, Canada)



Atmospheric aerosols can severely affect human health and cause allergies, asthma, and cardiovascular and respiratory diseases. Aerosols have also significant effects on Earth’s climate. They have direct effects of Earth’s energy balance by scattering of, for example, incoming solar radiation and indirect effects by serving as cloud condensation nuclei.
The first part of the presentation will be about photo-reaction (‘smog’) chamber experiments to study ageing of soot aerosol particles. Soot particles consist of many primary particles and have complex morphologies. If soot particles are coated with volatile organic compounds or secondary organic aerosol, they undergo structural changes.
In the second part of the talk, spectroscopic studies of clusters of organic acids with water will be described. Such clusters are thought to play a critical role in the initial steps of secondary organic aerosol particle formation.
Wolfgang Jäger received his PhD degree in Chemistry from the Christian Albrechts University in Kiel, Germany, in 1989. He joined the Department of Chemistry at the University of Alberta, Edmonton, Canada, in 1995 after spending time as postdoctoral fellow and research associate at the University of British Columbia, Vancouver, Canada. He was promoted to Associate Professor in 2001 and to the rank of Full Professor in 2003.
Professor Jäger’s research is multifaceted and includes fundamental studies of intermolecular interactions using spectroscopic investigations of weakly bound complexes and clusters, development of atmospheric trace gas sensing techniques that utilize solid state infrared diode lasers, photoreaction chamber studies of aerosol formation, and design and fabrication of external cavity lasers using MEMS technology. His work has resulted in more than 160 publications thus far.
For his scientific achievements, Professor Jäger was awarded the NSERC Steacie Memorial Fellowship in 2002, in 2004 he became a Tier I Canada Research Chair in Cluster Science which was renewed in 2011, and in 2008 he was elected Fellow of the Royal Society of Canada. From 2009 to 2010, he spent a sabbatical year at the Fritz Haber Institute of the Max Planck Society in Berlin, Germany, which was funded by a prestigious Humboldt Fellowship.