Fig. 1: Time series of NDVI and the associated changes in PFT cover for each ecosystem.
From: Vegetation recovery following retrogressive thaw slumps across northern tundra regions
Coloured dots and grey plus symbols represent mean NDVI values for each RTS subpart, segmented by identified breakpoints (indicated by vertical lines). PFT cover is visualized using a ternary diagram showing the proportions of low-stature vegetation, erect shrubs and bare ground. Each dot (RTS subpart) is colour-coded on the basis of its PFT classification. The RTS subparts that lack vegetation surveys are shown in plus symbols. Black lines represent best-fit NDVI piecewise trends, with the grey bands representing the 95% confidence intervals. The red triangles on the map indicate the locations of four validation sites, including CR, PP, HI and TP. The basemap shows the circumpolar permafrost extent map. Basemap data from the US National Snow and Ice Data Center/World Data Center for Glaciology61.
