Articles | Volume 16, issue 18
https://doi.org/10.5194/amt-16-4263-2023
https://doi.org/10.5194/amt-16-4263-2023
Research article
 | 
25 Sep 2023
Research article |  | 25 Sep 2023

Comparison of photoacoustic spectroscopy and cavity ring-down spectroscopy for ambient methane monitoring at Hohenpeißenberg

Max Müller, Stefan Weigl, Jennifer Müller-Williams, Matthias Lindauer, Thomas Rück, Simon Jobst, Rudolf Bierl, and Frank-Michael Matysik

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Cited articles

Barreiro, N., Vellespi, A., Santiago, G., Slezak, V., and Peuriot, A.: Influence of oxygen on the resonant photoacoustic signal from methane excited at the ν3 mode, Appl. Phys. B, 104, 983–987, https://doi.org/10.1007/s00340-011-4546-8, 2011. a, b, c
Barreiro, N., Peuriot, A., Santiago, G., and Slezak, V.: Water-based enhancement of the resonant photoacoustic signal from methane–air samples excited at 3.3 µm, Appl. Phys. B, 108, 369–375, https://doi.org/10.1007/s00340-012-5018-5, 2012. a, b
Defratyka, S. M., Paris, J.-D., Yver-Kwok, C., Fernandez, J. M., Korben, P., and Bousquet, P.: Mapping Urban Methane Sources in Paris, France, Environ. Sci. Technol., 55, 8583–8591, https://doi.org/10.1021/acs.est.1c00859, 2021. a, b
Dello Russo, S., Sampaolo, A., Patimisco, P., Menduni, G., Giglio, M., Hoelzl, C., Passaro, V. M., Wu, H., Dong, L., and Spagnolo, V.: Quartz-enhanced photoacoustic spectroscopy exploiting low-frequency tuning forks as a tool to measure the vibrational relaxation rate in gas species, Photoacoustics, 21, 100227, https://doi.org/10.1016/j.pacs.2020.100227, 2021. a
Elefante, A., Giglio, M., Sampaolo, A., Menduni, G., Patimisco, P., Passaro, V. M., Wu, H., Rossmadl, H., Mackowiak, V., Cable, A., Tittel, F. K., Dong, L., and Spagnolo, V.: Dual-Gas Quartz-Enhanced Photoacoustic Sensor for Simultaneous Detection of Methane/Nitrous Oxide and Water Vapor, Anal. Chem., 91, 12866–12873, https://doi.org/10.1021/acs.analchem.9b02709, 2019. a
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Short summary
Over a period of 5 d, a photoacoustic methane sensor was compared with a Picarro cavity ring-down (G2301) spectrometer. Both devices measured the ambient methane concentration at the meteorological observatory Hohenpeißenberg. Cross-sensitivities on the photoacoustic signal, due to fluctuating ambient humidity, were compensated by applying the CoNRad algorithm. The results show that photoacoustic sensors have the potential for accurate and precise greenhouse gas monitoring.
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