1 November 2012 First attempt to monitor atmospheric glyoxal using differential absorption lidar
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Glyoxal (CHOCHO), as an indicator of photochemical “hot spots”, was for the first time the subject of a differential absorption lidar (DIAL) campaign. The strongest absorption line of glyoxal in the blue wavelength region – 455.1 nm – was chosen as the experimental absorption wavelength. In order to handle the effects of absorption cross-section variation of the interfering gas – nitrogen dioxide (NO2) – three-wavelength DIAL measurements simultaneously detecting glyoxal and NO2, were performed. The differential absorption curves, recorded in July 2012, indicate an extremely low glyoxal concentration in Lund, Sweden, although it is expected to be peaking at this time of the year.
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Liang Mei, Patrik Lundin, Gabriel Somesfalean, Jiandong Hu, Guangyu Zhao, Sune Svanberg, Joakim Bood, Mihalis Vrekoussis, Alexandros Papayannis, "First attempt to monitor atmospheric glyoxal using differential absorption lidar", Proc. SPIE 8534, Remote Sensing of Clouds and the Atmosphere XVII; and Lidar Technologies, Techniques, and Measurements for Atmospheric Remote Sensing VIII, 853412 (1 November 2012); doi: 10.1117/12.2009528; https://doi.org/10.1117/12.2009528


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