Fellow, American Association for the Advancement of Science (AAAS), 2015
Fellow, International Union of Pure and Applied Chemistry (IUPAC), 2014
Fellow, American Chemical Society (ACS), 2010
Sustained Research Award, Georgia Tech School of Earth & Atmospheric Sciences, 2010
Senior Faculty Best Paper Award, Georgia Tech Chapter of Sigma Xi, 1996
Undergraduate Research Advisor Award, Georgia Tech Chapter of Sigma Xi, 1991
Award for Outstanding Performance in Research, Georgia Tech Research Institute, 1987
Robert A. Welch... (read more)
Atmospheric chemists attempt to understand the chemical composition of the natural atmosphere, the nature of interactions involving atmospheric gases, liquids, and solids, as well as the Earth surface and biosphere, and the ways that human activity affects the chemical and physical characteristics of the atmosphere. Important environmental issues that are linked to human impacts on atmospheric chemistry include global climate change, urban and regional air quality, stratospheric ozone depletion, and acid deposition.
Chemical change in the atmosphere is driven largely by reactions of photochemically generated free radicals. Sophisticated experimental techniques (usually associated with physical chemists) are required to quantitatively characterize important atmospheric photochemical processes as well as the kinetics and mechanisms of the fast free radical reactions, most of which are initiated photochemically. In our laboratory, laser flash photolysis and fast flow techniques are employed to generate reactive intermediates of interest, and a variety of optical and mass spectrometric techniques are employed to probe the time evolution of reactants and products. Both gas-phase and condensed phase processes are investigated. The experimental results provide needed input into models of atmospheric transport and chemical transformation that are employed to understand the phenomena mentioned in the first paragraph above. Results of our studies also provide fundamental information that is useful for establishing free radical thermochemistry and for refining reaction rate theories. Current and former sponsors of our research include the National Aeronautics and Space Administration (NASA), the National Science Foundation (NSF), the Camille and Henry Dreyfus Foundation, Stiftelsson-Teltek (Norway), the Environmental Protection Agency (EPA), the Electric Power Research Institute (EPRI), and the Chemical Manufacturers Association (CMA).
Pure and Applied Chemistry, 2012-2013
Advances in Physical Chemistry, 2008-2011
International Journal of Chemical Kinetics, 1994-1996
Journal of Physical Chemistry, Senior Editor, 1994-2014