Fig. 9
From: Ash fall impact on vegetation: a remote sensing approach of the Oldoinyo Lengai 2007–08 eruption
Map of the logarithmic regression parameters for fitting the Ash Recovery Index (ARI) values through time. (a) Slope values, (b) Half recovery time (c) Full recovery time. (d) Logarithmic regression between the measured ash thickness and the slope values of the ARI. (e) Spatial distribution of field points for which thickness is documented. Grey values in D and E marks points for which no positive vegetation evolution is observed. The purple ellipse in a, b, c and e show the location of the 3 cm isopach line used for volume interpolation