报 告 人：Professor Douglas R. Worsnop
报告题目：Mass Spectrometry of Atmospheric Aerosol: 1 nanometer to 1 micron
Despite much effort in the past decades, uncertainties in both climate impacts and health effects of atmospheric aerosols remain large. During the last ten 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, clouds and climate.
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 Vice-President (2000), he also has been FiDiPro Professor of Physics 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 500 publications in chemical kinetics and aerosol chemistry, specializing in laboratory and field studies of the interactions of gases and aerosol particles.