Articles | Volume 19, issue 14
https://doi.org/10.5194/amt-19-4875-2026
https://doi.org/10.5194/amt-19-4875-2026
Research article
 | 
29 Jul 2026
Research article |  | 29 Jul 2026

1.645 µm differential absorption lidar measurements of atmospheric methane using an Er:YAG laser

Dimitri Edouart, Fabien Gibert, and Claire Cénac

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Cited articles

Barton-Grimley, R. A., Nehrir, A. R., Kooi, S. A., Collins, J. E., Harper, D. B., Notari, A., Lee, J., DiGangi, J. P., Choi, Y., and Davis, K. J.: Evaluation of the High Altitude Lidar Observatory (HALO) methane retrievals during the summer 2019 ACT-America campaign, Atmos. Meas. Tech., 15, 4623–4650, https://doi.org/10.5194/amt-15-4623-2022, 2022. 
Bösenberg, J.: Ground-based differential absorption lidar for water-vapor and temperature profiling: methodology, Appl. Opt., 37, 3845–3860, https://doi.org/10.1364/AO.37.003845, 1998. 
Buchwitz, M., Rozanov, V. V., and Burrows, J. P.: A near-infrared optimized DOAS method for the fast global retrieval of atmospheric CH4, CO, CO2, H2O, and N2O total column amounts from SCIAMACHY Envisat-1 nadir radiances, J. Geophys. Res., 105, 15231–15245, https://doi.org/10.1029/2000JD900191, 2000. 
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Short summary
A differential absorption lidar (DIAL) based on an Er:YAG laser measured methane mixing ratio profiles along a quasi-horizontal path. A precision better than 1 % was achieved up to 3.5 km with a spatiotemporal resolution of 470 m / 20 min. The measurements were compared with in-situ instruments. An analysis of random and systematic errors shows that the main limitation is the uncertainty in the ON wavelength.
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