Figure : fig-11-5

Mechanisms of Soil Carbon Stabilization Associated with Different Soil Orders in the Northern Circumpolar Permafrost Zone

Figure 11.5

This figure appears in chapter 11 of the Second State of the Carbon Cycle Report (SOCCR2): A Sustained Assessment Report report.

Gelisol soils have a seasonally frozen active layer at the soil surface and perennially frozen (permafrost) layer at depth. Histosol and other soil orders in the permafrost zone have seasonally frozen soil at the surface. Of the Gelisol soils, freeze-thaw mixing is indicative of the Turbel suborder and waterlogging of the Histel suborder; Orthels do not have characteristics of the first two suborders. Mineral complexation and other mechanisms preserving carbon are features of all soils but are labeled here as soil orders and suborders not strongly characterized by freeze-thaw processes or waterlogging. Pie area represents proportional storage of carbon (soil depth of 0 to 3 m) in the permafrost zone. [Data source: Hugelius et al., 2014; see also Table 11.1, p. 439.]

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This figure was created on February 05, 2018.

This figure was submitted on March 22, 2019.

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