Fig. 2.

Soil decomposition environmental rate scalar values in the fully forced run, annual mean and averaged over the permafrost region, shown as a function of depth and time: (A) temperature scalar, (B) liquid moisture scalar, (C) oxygen scalar, and (D) the product of these three environmental controls on decomposition. The primary limitation to decomposition associated with freezing is via the moisture scalar; thus it shows the strongest change in magnitude and vertical profile with warming and thawing.