Wolfson Atmospheric
Chemistry Laboratories

Innovation Way
University of York
Heslington
York, YO10 5DD

General Enquiries

Jenny Hudson-Bell
wacl@york.ac.uk
01904 322609

Direct measurements of OH and other product yields from the HO2 + CH3C(O)O2 reaction.

Frank A.F. Winiberg, Terry J.Dillon, Stephanie C.Orr, Christoph B.M Groß, Iustinian Bejan, Charlotte A.Brumby, Matthew J.Evans, Shona C.Smith, Dwayne E.Heard, and Paul W. Seakins, ACP, 2016 DOI: 10.5194/acp-16-4023-2016

http://www.atmos-chem-phys.net/16/4023/2016/

Free radicals are important intermediates in the atmosphere, controlling rates of removal for many pollutants, and the formation rate for ozone. High radical concentrations observed in tropical regions are yet to be fully explained.

This paper describes the most fully comprehensive lab-based study of an important chemical reaction that can both remove and recycle free-radicals. Experiments were conducted at the University of Leeds Highly Instrumented Reactor for Atmospheric Chemistry (HIRAC), and used laser-techniques for radical detection. The implications of these new results, including predictions of increased radical concentrations in air, were calculated via a global model.