Articles | Volume 15, issue 15
Atmos. Meas. Tech., 15, 4473–4487, 2022
https://doi.org/10.5194/amt-15-4473-2022
Atmos. Meas. Tech., 15, 4473–4487, 2022
https://doi.org/10.5194/amt-15-4473-2022
Research article
03 Aug 2022
Research article | 03 Aug 2022

Development of a broadband cavity-enhanced absorption spectrometer for simultaneous measurements of ambient NO3, NO2, and H2O

Woohui Nam et al.

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Short summary
We describe our vibration-resistant instrument for measuring ambient NO3, NO2, and H2O based on cavity-enhanced absorption spectroscopy. By simultaneous retrieval of H2O with the other species using a measured H2O absorption spectrum, direct quantifications among all species are possible without any pre-treatment for H2O. Our instrument achieves the effective light path to ~101.5 km, which allows the sensitive measurements of NO3 and NO2 as 1.41 pptv and 6.92 ppbv (1σ) in 1 s.