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Atmospheric Aerosol Chemistry: Climate and Air Quality
Tuesday 09 December 2025, 12:00pm
Prof. Douglas R. Worsnop, Senior Vice-President, FiDiPro Professor of Physics,INAR, University of Helsinki
Location : LH3
Abstract of the talk:
Despite much effort in the past decades, uncertainties in both climate impacts and health effects of atmospheric aerosols remain large. During the last 25 years, aerosol mass spectrometry (AMS) has shown that sub-micron aerosol chemical composition is roughly 50:50 inorganic and organic worldwide, with secondary highly oxidized organics dominating the latter. Parallel application of chemical ionization mass spectrometry (CIMS) has provided the first observation of molecular cluster ions involved in atmospheric nucleation, including detection of highly oxidized multifunctional (HOM) organics in the gas phase. These results will be discussed in the context of their impact on atmospheric aerosols, air quality and climate; from the boreal forest to Chinese megacities
Brief Bio of Prof. Doug:
Douglas R. Worsnop received his PhD in chemistry from Harvard University (1982); was a Humboldt Fellow in Physics at the University of Freiburg, Germany; joined Aerodyne Research, outside Boston, in 1985. Now Senior Vice-President, he also has been FiDiPro Professor of Physics in INAR at the University of Helsinki since 2007. A Fellow of AAAS, AGU and AAAR, winner of the Benjamin Liu Prize for Aerosol Instrumentation (AAAR), the Yoram Kaufmann Award for Unselfish Cooperation in Research (AGU), the Fuchs Memorial Award (IARA) for outstanding research in aerosol science and the ACS Award for Creativity in Environmental Science, he has over 600 publications in chemical kinetics and aerosol chemistry, specializing in laboratory and field studies of the interactions of gases and aerosol particles.
Google scholar profile for publication list : https://scholar.google.com/citations?user=YCUCs8RuWf4C&hl=en
Despite much effort in the past decades, uncertainties in both climate impacts and health effects of atmospheric aerosols remain large. During the last 25 years, aerosol mass spectrometry (AMS) has shown that sub-micron aerosol chemical composition is roughly 50:50 inorganic and organic worldwide, with secondary highly oxidized organics dominating the latter. Parallel application of chemical ionization mass spectrometry (CIMS) has provided the first observation of molecular cluster ions involved in atmospheric nucleation, including detection of highly oxidized multifunctional (HOM) organics in the gas phase. These results will be discussed in the context of their impact on atmospheric aerosols, air quality and climate; from the boreal forest to Chinese megacities
Brief Bio of Prof. Doug:
Douglas R. Worsnop received his PhD in chemistry from Harvard University (1982); was a Humboldt Fellow in Physics at the University of Freiburg, Germany; joined Aerodyne Research, outside Boston, in 1985. Now Senior Vice-President, he also has been FiDiPro Professor of Physics in INAR at the University of Helsinki since 2007. A Fellow of AAAS, AGU and AAAR, winner of the Benjamin Liu Prize for Aerosol Instrumentation (AAAR), the Yoram Kaufmann Award for Unselfish Cooperation in Research (AGU), the Fuchs Memorial Award (IARA) for outstanding research in aerosol science and the ACS Award for Creativity in Environmental Science, he has over 600 publications in chemical kinetics and aerosol chemistry, specializing in laboratory and field studies of the interactions of gases and aerosol particles.
Google scholar profile for publication list : https://scholar.google.com/citations?user=YCUCs8RuWf4C&hl=en
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