Articles | Volume 12, issue 1
https://doi.org/10.5194/amt-12-271-2019
https://doi.org/10.5194/amt-12-271-2019
Research article
 | 
15 Jan 2019
Research article |  | 15 Jan 2019

A calibration procedure which accounts for non-linearity in single-monochromator Brewer ozone spectrophotometer measurements

Zahra Vaziri Zanjani, Omid Moeini, Tom McElroy, David Barton, and Vladimir Savastiouk

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Cited articles

Bais, A. F., Zerefos, C. S., and McElroy, C. T.: Solar UVB measurements with the double- and single-monochromator Brewer ozone spectrophotometers, Geophys. Res. Lett., 23, 833–836, https://doi.org/10.1029/96GL00842, 1996. 
Fioletov, V. E., Kerr, J. B., Wardle, D. I., and Wu, E.: Correction of stray light for the Brewer single monochromator, Proc. Quadrennial Ozone Symposium, 21, 369–370, 2000. 
Fountoulakis, I., Redondas, A., Bais, A. F., Rodriguez-Franco, J. J., Fragkos, K., and Cede, A.: Dead time effect on the Brewer measurements: correction and estimated uncertainties, Atmos. Meas. Tech., 9, 1799–1816, https://doi.org/10.5194/amt-9-1799-2016, 2016. 
Gröbner, J., Wardle, D. I., McElroy, C. T., and Kerr, J. B.: Investigation of the wavelength accuracy of brewer spectrophotometers, Appl. Optics, 37, 8352–8360, 1998. 
Josefsson, W. A. P.: Focused Sun Observations Using a Brewer Ozone Spectrophotometer, J. Geophys. Res., 97, 15813–15817, 1992. 
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Short summary
It is now known that single-monochromator Brewer spectrophotometer ozone and sulfur dioxide measurements suffer from non-linearity at large ozone slant column amounts due to the presence of instrumental stray light caused by scattering within the optics of the instrument. This paper presents a simple and practical method of correcting for the effects of stray light.