Figure 5 . Spectral reflectance of mixed-composition pixels from representative tundra sites in Alaska. Figure adapted from (Davidson et al., 2016). Sample size (n) is shown parenthetically. Sentinel-2 bandpasses are indicated with vertical bars to illustrate the advantage of imaging spectrometers with contiguous bands over multispectral instruments. Dots are opaque to show the density of observations. Spectra were collected using a UniSpec DC Analysis System (PP Systems, Amesbury, MA, USA) with a spatial resolution of 50 cm.