NDVI/NDII track senescence timing (decline). CRI/ARI track color-change timing (yellowing/reddening peak). Aug–Dec only, cloud + snow masked. Marker size = confidence, from a bootstrap confidence interval on the transition date (narrower CI = larger marker).
NDVI — senescence decline
Position = fitted 50% decline date · size = confidence (obs count, see below)
NDII — canopy water decline
Position = fitted 50% decline date · size = confidence (obs count, see below)
CRI — yellowing (carotenoid)
Position = fitted peak-color date · size = confidence (obs count, see below)
ARI — reddening (anthocyanin)
Position = fitted peak-color date · size = confidence (obs count, see below)