Highly Oxygenated Organic Molecules (HOM) from Gas-Phase Autoxidation Involving Peroxy Radicals: A Key Contributor to Atmospheric Aerosol [article]

Federico Bianchi, Theo Kurtén, Matthieu Riva, Claudia Mohr, Matti P. Rissanen, Pontus Roldin, Torsten Berndt, John D. Crounse, Paul O. Wennberg, Thomas F. Mentel, Jürgen Wildt, Heikki Junninen (+8 others)
Highly oxygenated organic molecules (HOM) are formed in the atmosphere via autoxidation involving peroxy radicals arising from volatile organic compounds (VOC). HOM condense on pre-existing particles and can be involved in new particle formation. HOM thus contribute to the formation of secondary organic aerosol (SOA), a significant and ubiquitous component of atmospheric aerosol known to affect the Earth's radiation balance. HOM were discovered only very recently, but the interest in these
more » ... unds has grown rapidly. In this Review, we define HOM and describe the currently available techniques for their identification/quantification, followed by a summary of the current knowledge on their formation mechanisms and physicochemical properties. A main aim is to provide a common frame for the currently quite fragmented literature on HOM studies. Finally, we highlight the existing gaps in our understanding and suggest directions for future HOM research. © 2019 American Chemical Society.
doi:10.34657/5889 fatcat:gl7qpjzdu5hdhl2luj2jdq537m