Fig. 6From: Ash fall impact on vegetation: a remote sensing approach of the Oldoinyo Lengai 2007–08 eruptionPrincipal component analysis of the vegetation time series: (a) Map of the factor scores for the sixth component of the PCA carried out on the NDVIdif time series from July 2005 to May 2010; (b) Component loadings for the sixth principal component, with variables being the monthly NDVIdif values for each pixel. Note the grey shading highlighting the eruption periodBack to article page