Articles | Volume 13, issue 6
Research article
12 Jun 2020
Research article |  | 12 Jun 2020

Implementation of a chemical background method for atmospheric OH measurements by laser-induced fluorescence: characterisation and observations from the UK and China

Robert Woodward-Massey, Eloise J. Slater, Jake Alen, Trevor Ingham, Danny R. Cryer, Leanne M. Stimpson, Chunxiang Ye, Paul W. Seakins, Lisa K. Whalley, and Dwayne E. Heard


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AR by Dwayne Heard on behalf of the Authors (07 Apr 2020)  Author's response    Manuscript
ED: Publish subject to technical corrections (29 Apr 2020) by Anna Novelli
Short summary
The OH radical is known as nature’s detergent, removing most trace gases from the atmosphere. Hence, an accurate measurement of its concentration is very important. We present measurements of OH in several field locations using a laser-based fluorescence method equipped with an OH scavenger. By determining the background signal in two different ways, we show that the instrument does not suffer any significant interferences that could result in an overestimation of OH concentrations.