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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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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