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Published on: November 18, 2018
Measurements of gaseous hydrogen peroxide in southern England during a photochemical episode
G J Dollard1, F J Sandalls, R G Derwent
1Modelling and Assessments Group, Environmental and Medical Sciences Division, Harwell Laboratory, Didcot, Oxon OX11 0RA, UK.
Abstract:
Simultaneous measurements of gaseous hydrogen peroxide and ozone made in southern England are reported. The hydrogen peroxide measurements are the first reported for the United Kingdom and show clear diurnal trends and correlate with ozone measurements. Measurements were made during a photochemical episode when a peak hydrogen peroxide concentration of 2.5 microg m(-3) was recorded with a simultaneous peak of 168 microg m(-3) in the ozone concentration. From observations on the rate of decay in the measured concentrations, an evening-time deposition velocity of 0.28 cm s(-1) was derived for hydrogen peroxide.
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