Articles | Volume 8, issue 10
Atmos. Meas. Tech., 8, 4243–4264, 2015
Atmos. Meas. Tech., 8, 4243–4264, 2015
Research article
14 Oct 2015
Research article | 14 Oct 2015

Intercomparison of the comparative reactivity method (CRM) and pump–probe technique for measuring total OH reactivity in an urban environment

R. F. Hansen et al.

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Cited articles

Amedro, D., Parker, A. E., Schoemaecker, C., and Fittschen, C.: Direct observation of OH radicals after 565 nm multi-photon excitation of NO2 in the presence of H2O, Chem. Phys. Lett., 513, 12–16,, 2011.
Amedro, D., Miyazaki, K., Parker, A., Schoemaecker, C., and Fittschen, C.: Atmospheric and kinetic studies of OH and HO2 by the FAGE technique, J. Environ. Sci., 24, 78–86,, 2012.
Ashmore, M. R.: Assessing the future global impacts of ozone on vegetation, Plant Cell Environ., 28, 949–964, 2005.
Atkinson, R. and Arey, J.: Atmospheric Degradation of Volatile Organic Compounds, Chem. Rev., 103, 4605–4638, 2003.
Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson, R. F., Hynes, R. G., Jenkin, M. E., Rossi, M. J., Troe, J., and IUPAC Subcommittee: Evaluated kinetic and photochemical data for atmospheric chemistry: Volume II – gas phase reactions of organic species, Atmos. Chem. Phys., 6, 3625–4055,, 2006.
Short summary
This paper describes and presents results from a intercomparison, in an environment rich in NOx (i.e., NO+NO2), of two OH reactivity instruments: one based on the comparative reactivity method, and one based on the pump-probe method. Co-located measurements were made of both ambient air and standard mixtures. Ambient OH reactivity values measured by both instruments were found to be in good agreement for ambient NOx mixing ratios as high as 100 ppbv.