Figure 332
Fig. 332
normal (630x209, 4 KB) large (1024x339, 9 KB) EPS (17 KB)
Aerosol-mass column between 15 and 20 km altitude derived from backscatter measurements made by lidar at Garmisch-Partenkirchen, Germany, between 1976 and 1997. Approximate dates of major volcanic eruptions are noted below the horizontal axis. The dashed line indicates average values before 1980, which can be considered background values free from volcanic influence. (Adapted from Jäger and Hofmann, 1991; Jäger et al., 1998.)