Clear-air lidar dark band

Di Girolamo, Paolo; Scoccione, Andrea; Cacciani, Marco; Summa, Donato; De Rosa, Benedetto; Schween, Jan H.

This paper illustrates measurements carried out by the Raman lidar BASIL in the frame of the HD(CP)inline-formula2 Observational Prototype Experiment (HOPE), revealing the presence of a clear-air dark band phenomenon (i.e. a minimum in lidar backscatter echoes) in the upper portion of the convective boundary layer. The phenomenon is clearly distinguishable in the lidar backscatter echoes at 532 and 1064 nm, as well as in the particle depolarisation data. This phenomenon is attributed to the presence of lignite aerosol particles advected from the surrounding open pit mines in the vicinity of the measuring site. The paper provides evidence of the phenomenon and illustrates possible interpretations for its occurrence.

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Di Girolamo, Paolo / Scoccione, Andrea / Cacciani, Marco / et al: Clear-air lidar dark band. 2018. Copernicus Publications.

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