Fig. 1: Two lidar measurements of liquid-water clouds that formed under contrasting ambient aerosol conditions. top: clean conditions. bottom: polluted conditions.
Figure 1 shows the time-height cross section of the range-corrected lidar signals at 532 nm. The measurements were performed on 26 July 2011 and 5 September 2011 in Leipzig, Germany. Strong signals, shown in red color, indicate the probed clouds. Aerosol layers are indicated with yellowish and greenish colors whereas blue colors represent low lidar signals and thus a comparably clean air.