First triple-wavelength lidar observations of depolarization and extinction-to-backscatter ratios of Saharan dus ...

• Main Authors: Haarig, Moritz, Ansmann, Albert, Engelmann, Ronny, Baars, Holger, Toledano, Carlos, Torres, Benjamin, Althausen, Dietrich, Radenz, Martin, Wandinger, Ulla
• Format: Text
• Language: unknown
• Published: Katlenburg-Lindau : EGU 2022
• Subjects: Germany; Leipzig; Saxony; AERONET; aerosol; 550; Aerosol Robotic Network
• Online Access: https://dx.doi.org/10.34657/10901; https://oa.tib.eu/renate/handle/123456789/11868

Two layers of Saharan dust observed over Leipzig, Germany, in February and March 2021 were used to provide the first-ever lidar measurements of the dust lidar ratio (extinction-to-backscatter ratio) and linear depolarization ratio at all three classical lidar wavelengths (355, 532 and 1064gnm). The pure-dust conditions during the first event exhibit lidar ratios of 47g±g8, 50g±g5 and 69g±g14gsr and particle linear depolarization ratios of 0.242g±g0.024, 0.299g±g0.018 and 0.206g±g0.010 at wavelengths of 355, 532 and 1064gnm, respectively. The second, slightly polluted-dust case shows a similar spectral behavior of the lidar and depolarization ratio with values of the lidar ratio of 49g±g4, 46g±g5 and 57g±g9gsr and the depolarization ratio of 0.174g±g0.041, 0.298g±g0.016 and 0.242g±g0.007 at 355, 532 and 1064gnm, respectively. The results were compared with Aerosol Robotic Network (AERONET) version 3 (v3) inversion solutions and the Generalized Retrieval of Aerosol and Surface Properties (GRASP) at six and ...