Fig. 4

a Forest disturbance and restoration product developed by VCT algorithm in 2017. b Forest disturbance patterns mapped by the VCT algorithm during the 1987–2017 time period. For each year, the VCT algorithm was used to produce maps of disturbance. Dark green pixels representing “persisting forest” in the VCT algorithm were defined as “VCT undisturbed forest”; light green pixels representing “probable forest with recent disturbance” were defined as “VCT post-disturbance regrowing forest”