Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/19110
Title: Night-time chemistry above London: measurements of NO[subscript 3] and N[subscript 2]O[subscript 5] from the BT Tower
Authors: Benton, A.K.
Langridge, J.M.
Ball, S.M.
Bloss, W.J.
Dall'Osto, M.
Nemitz, E.
Harrison, R.M.
Jones, R.L.
First Published: 2010
Publisher: Copernicus GmbH (Copernicus Publications) on behalf of the European Geosciences Union (EGU).
Citation: Atmospheric Chemistry and Physics, 2010, 10 (20), pp. 9781-9795
Abstract: Broadband cavity enhanced absorption spectroscopy (BBCEAS) has been used to measure the sum of concentrations of NO[subscript 3] and N[subscript 2]O[subscript 5] from the BT (telecommunications) Tower 160 m above street level in central London during the REPARTEE II campaign in October and November 2007. Substantial variability was observed in these night-time nitrogen compounds: peak NO[subscript 3] and N[subscript 2]O[subscript 5] mixing ratios reached 800 pptv, whereas the mean night-time NO[subscript 3] and N[subscript 2]O[subscript 5] was approximately 30 pptv. Additionally, [NO[subscript 3] and N[subscript 2]O[subscript 5]] showed negative correlations with [NO] and [NO[subscript 2]] and a positive correlation with [O[subscript 3]]. Co-measurements of temperature and NO[subscript 2] from the BT Tower were used to calculate the equilibrium partitioning between NO[subscript 3] and N[subscript 2]O[subscript 5] which was always found to strongly favour N[subscript 2]O[subscript 5] (NO[subscript 3]/N[subscript 2]O[subscript 5]=0.01 to 0.04). Two methods are used to calculate the lifetimes for NO[subscript 3] and N[subscript 2]O[subscript 5], the results being compared and discussed in terms of the implications for the night-time oxidation of nitrogen oxides and the night-time sinks for NO[subscript y].
DOI Link: 10.5194/acp-10-9781-2010
ISSN: 1680-7316
eISSN: 1680-7324
Links: http://hdl.handle.net/2381/19110
http://www.atmos-chem-phys.net/10/9781/2010/acp-10-9781-2010.html
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: © Author(s) 2010. This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Chemistry

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