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Simulations of shrub tundra NDVI using the GeoSail model. For simulations examining the effects of mixtures of shrubs and lower stature tundra (the black and gray lines), shrub leaf LAI is 4.25. For simulations varying shrub LAI (green lines) the graminoid canopy background has green LAI of 0.56 over a moss layer, while shrub LAI varies. The line colors correspond to the lines in Fig. 9.
