Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/31998
Title: Reaction between CH3O 2 and BrO radicals: A new source of upper troposphere lower stratosphere hydroxyl radicals
Authors: Shallcross, DE
Leather, KE
Bacak, A
Xiao, P
Lee, EPF
Ng, M
Mok, DKW 
Dyke, JM
Hossaini, R
Chipperfield, MP
Khan, MAH
Percival, CJ
Issue Date: 2015
Publisher: American Chemical Society
Source: Journal of physical chemistry A, 2015, v. 119, no. 19, p. 4618-4632 How to cite?
Journal: Journal of Physical Chemistry A 
Abstract: Over the last two decades it has emerged that measured hydroxyl radical levels in the upper troposphere are often underestimated by models, leading to the assertion that there are missing sources. Here we report laboratory studies of the kinetics and products of the reaction between CH3O2 and BrO radicals that shows that this could be an important new source of hydroxyl radicals:BrO + CH3O2 ¡÷ products (1). The temperature dependent value in Arrhenius form of k(T) is k1 = (2.42-0.72+1.02) ¡Ñ 10-14 exp[(1617 ¡Ó 94)/T] cm3 molecule-1 s-1. In addition, CH2OO and HOBr are believed to be the major products. Global model results suggest that the decomposition of H2COO to form OH could lead to an enhancement in OH of up to 20% in mid-latitudes in the upper troposphere and in the lower stratosphere enhancements in OH of 2-9% are inferred from model integrations. In addition, reaction 1 aids conversion of BrO to HOBr and slows polar ozone loss in the lower stratosphere.
URI: http://hdl.handle.net/10397/31998
ISSN: 1089-5639
DOI: 10.1021/jp5108203
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