Fig. 7
From: Ash fall impact on vegetation: a remote sensing approach of the Oldoinyo Lengai 2007–08 eruption
Slope values resulting from the OLS trend analysis. Analysis is carried out on NDVIcorr values per pixel for three different time periods: (a) pre-eruptive phase May 2005 – May 2007; (b) during the year of the eruption May 2007- May 2008; (c) post-eruptive phase May 2008 - May 2013; (d) Schematic representation of the temporal evolution of the NDVI for an area affected by ash and the associated trend lines for the three period of interest shown in a, b and c