In the paper “Attributing carbon changes in conterminous U.S. forests to disturbance and non-disturbance factors from 1901 to 2010” (Journal of Geophysical Research-Biogeosciences, 117, G02021, doi:10.1029/2011JG001930, 2012), the Integrated Terrestrial Ecosystem Carbon Model (InTEC) is validated and used for the conterminous U.S. forests. Zhang et al. quantify the disturbance and non-disturbance effects on forest C changes in the continental U.S. using forest inventory analysis (FIA) data and the process-based InTEC model driven by forest stand age, climate, and atmospheric composition data. Factors are grouped into disturbance effects (i.e., direct C loss from harvest, fire and insect attacks, and subsequent forest recovery following disturbance events) and non-disturbance effects (i.e., from climate variability, changing atmospheric CO2 concentration, and N deposition).
 There are three errors in Figure 2:
 The unit for Figure 2b should be “g N m–2 per year” (the original is g N m–2 per century).
 The ramp colors for the legend for Figure 2d should be reversed.
 The caption for Figure 2 should be correspondingly corrected.