Articles | Volume 12, issue 4
Atmos. Meas. Tech., 12, 2499–2512, 2019
https://doi.org/10.5194/amt-12-2499-2019

Special issue: Advances in cavity-based techniques for measurements of atmospheric...

Atmos. Meas. Tech., 12, 2499–2512, 2019
https://doi.org/10.5194/amt-12-2499-2019

Research article 24 Apr 2019

Research article | 24 Apr 2019

Development of an incoherent broadband cavity-enhanced absorption spectrometer for measurements of ambient glyoxal and NO2 in a polluted urban environment

Shuaixi Liang et al.

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Chen, J. and Venables, D. S.: A broadband optical cavity spectrometer for measuring weak near-ultraviolet absorption spectra of gases, Atmos. Meas. Tech., 4, 425–436, https://doi.org/10.5194/amt-4-425-2011, 2011. 
Coburn, S., Ortega, I., Thalman, R., Blomquist, B., Fairall, C. W., and Volkamer, R.: Measurements of diurnal variations and eddy covariance (EC) fluxes of glyoxal in the tropical marine boundary layer: description of the Fast LED-CE-DOAS instrument, Atmos. Meas. Tech., 7, 3579–3595, https://doi.org/10.5194/amt-7-3579-2014, 2014. 
Fang, B., Zhao, W., Xu, X., Zhou, J., Ma, X., Wang, S., Zhang, W., Venables, D. S., and Chen, W.: Portable broadband cavity-enhanced spectrometer utilizing Kalman filtering: application to real-time, in situ monitoring of glyoxal and nitrogen dioxide, Opt. Express, 25, 26910–26922, https://doi.org/10.1364/OE.25.026910, 2017. 
Fiedler, S. E., Hoheisel, G., Ruth, A. A., and Hese, A.: Incoherent broad-band cavity-enhanced absorption spectroscopy of azulene in a supersonic jet, Chem. Phys. Lett., 382, 447–453, https://doi.org/10.1016/j.cplett.2003.10.075, 2003. 
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Short summary
A home-built instrument of an incoherent broadband cavity-enhanced absorption spectrometer is reported for sensitive detection of CHOCHO and NO2 in China's highly polluted environment. An NO2 spectral profile measured using the same spectrometer is applied as a reference spectral profile in the subsequent atmospheric spectral analysis and retrieval of NO2 and CHOCHO. This will provide an idea for solving the problem of cross-interference of strongly absorbing gases in weakly absorbing gases.