Table 1.

Differences between current and potential carbon stocks for living tree biomass, dead wood and litter, soil (0–2 m depth) and total ecosystem carbon in different land-use types

Land-use types	Living tree biomass	Dead wood and litter	Soil	Total
Urban	1.1 (0.8–1.4)	0.3 (0.2–0.4)	0.3 (0.2–0.5)	1.7 (1.2–2.2)
Cropland	38.3 (25.5–50.7)	10.1 (6.7–13.3)	8.5 (5.4–12.6)	56.8 (37.5–76.6)
Pasture	29.8 (21.0–36.5)	7.6 (5.3–9.2)	6.0 (3.5–9.4)	43.3 (29.8–55.1)
Rangeland	24.6 (11.4–38.7)	6.1 (2.8–9.5)	3.1 (1.9–4.6)	33.7 (16.0–52.9)
Low-human-pressure land	37.0 (18.8–54.4)	12.2 (6.0–17.2)	4.2 (2.4–10.5)	53.3 (27.2–82.1)
Existing forest	84.7 (68.7–105.0)	26.9 (25.9–32.3)	27.3 (13.5–91.1)	138.9 (108.1–228.4)
Sum	216.7 (153.0–266.8)	61.8 (41.3–76.2)	49.3 (26.8–128.7)	327.8 (221.1–471.7)

Values show the means (in Gt C) of the four GS and six SD model predictions. Values in brackets show the full range of estimates across the ten models. For soil carbon, the uncertainty range (absolute errors) was based on ref. ²³.