Agenda

Speaker: Philip K. Hopke, Dept. Public Health Sciences, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA

Abstract:
The basic approach to quantitative resolution of air pollutant concentrations based on properly weighted least-squares fitting termed Positive Matrix Factorization (PMF) has been available for more than 2 decades. However, there have been a number of useful advances that have helped to improve the resolution of source profiles and the likely accuracy of resulting source contributions. There are new ways to preprocess the data to reduce the influence of local scale meteorology. Factor analysis operates on the variability of the observed concentrations.  Those variations are driven by both the temporal patterns of the emissions from the multiple sources and the local meteorology that disperses these emissions. Recently, dispersion normalized PMF has been demonstrated in which the data are normalized to the mean ventilation coefficient (VC = mixed layer height x wind speed) over the whole sampling period.   

Bio Sketch:
Dr. Philip K. Hopke is the Bayard D. Clarkson Distinguished Professor Emeritus at Clarkson University, and former Director of the Center for Air Resources Engineering and Science (CARES), and former Director of the Institute for a Sustainable Environment (ISE).  He also holds an adjunct professorship in the Department of Public Health Sciences at the University of Rochester School of Medicine and Dentistry.  Dr. Hopke is a past Chair of EPA’s Clean Air Scientific Advisory Committee (CASAC), and has served on the EPA Science Advisory Board (SAB). Professor Hopke is a Past President of the American Association for Aerosol Research (AAAR), and was a member of the more than a dozen National Research Council committees. He is a member of the NRC’s Board of Environmental Studies and Toxicology.  He is a fellow of the International Aerosol Research Assembly, the American Association for the Advancement of Science, the Air and Waste Management Association, and the American Association fo r Aerosol Research.  He is an elected member of the International Statistics Institute and was the recipient of the Eastern Analytical Symposium Award in Chemometrics and the Chemometrics in Analytical Chemistry Conference Lifetime Achievement Award. He is also a recipient of the David Sinclair Award of the AAAR and co-recipient of the 2018 Fissan-Pui-TSI Award for International Collaboration presented by the International Aerosol Research Assembly. He served as a Jefferson Science Fellow at the U.S. Department of State during the 2008-09 academic year. Professor Hopke received his B.S. in Chemistry from Trinity College (Hartford) and his M.A. and Ph.D. degrees in chemistry from Princeton University. After a post-doctoral appointment at M.I.T. and four years as an assistant professor at the State University College at Fredonia, NY, Dr. Hopke joined the University of Illinois at Urbana-Champaign, rising to the rank of professor of environmental chemistry, and subsequently came to Cla rkson in 1989 as the first Robert A. Plane Professor with a principal appointment in the Department of Chemistry. He moved his principal appointment to the Department of Chemical and Biomolecular Engineering in 2000.   In 2002, he became the Clarkson Professor and Director of CARES.  On July 1, 2010, he became Director of ISE that houses Clarkson’s undergraduate and graduate environmental science degree programs as well as managing its sustainability initiatives. In May 2016 he moved to emeritus status.  In April 2016, he was appointed as an Adjunct Professor in the Department of Public Health Sciences of the University of Rochester School of Medicine and Dentistry.