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Title: An improved dual channel PERCA instrument for atmospheric measurements of peroxy radicals
Authors: Green, T. J.
Reeves, C. E.
Fleming, Zoe L.
Brough, N.
Rickard, A. R.
Bandy, B. J.
Monks, P. S.
Penkett, S. A.
First Published: 21-Apr-2006
Publisher: Royal Society of Chemistry
Citation: Journal of Environmental Monitoring , 2006, 8 (5), pp. 530-536
Abstract: This paper describes a new dual-channel PEroxy RadiCal Amplification (PERCA) instrument, which has been designed to improve the time resolution and signal to noise and to reduce the interference caused by variations in ambient ozone concentrations. The instrument was run at the Weybourne Atmospheric Observatory (WAO), North Norfolk, during WAOWEX (Weybourne Atmospheric Observatory Winter Experiment) in January/February 2002 and INSPECTRO (Influence of clouds on the spectral actinic flux in the lower troposphere) in September 2002. The performance of the instrument is assessed and compared to that of a single channel instrument. In particular, it is shown how the precision is greatly improved in fluctuating background ozone conditions. In addition the improved time response of the instrument allows changes in peroxy radical concentrations to be related to rapid changes in nitric oxide concentrations and the ozone photolysis frequency, j(O[superscript 1]D).
DOI Link: 10.1039/b514630e
ISSN: 1464-0325
eISSN: 1464-0333
Type: Journal Article
Description: Full text of this item is not currently available on the LRA. The final published version may be available through the links above.
Appears in Collections:Published Articles, Dept. of Chemistry

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