Figure 3

Contribution of component uncertainty to total tree carbon uncertainty. Contribution of stem wood, stem bark, coarse roots, total branch, and total foliage uncertainty to total tree uncertainty for Pseudotsuga menziesii, approach 2, positive correlation. Stem wood was the greatest contributor to total tree uncertainty at most diameter at breast height (DBH) classes for all species. Note that total tree uncertainty derived in this way was not always equal to the total tree uncertainty calculated using the roadmap (Figure 6) because the input components were derived from only one of the possible calculation pathways.