Table 2.
Evaluation of carbon stored in vegetation (Cveg) and turnover times (defined as soil carbon, Csoil, divided by net primary productivity, NPP) in the model in the year 2000
| Cveg (kgC m-2) | Turnover (yr) (Csoil/NPP) | |||
|---|---|---|---|---|
| Observations | Model | Observations | Model | |
| Tropical forests | 11 (2.9–19) | 10 (1.7–15) | 11 (6.0–21) | 6 (5.0–10) |
| Mixed forests | 2.9 (0.7–5.8) | 3.9 (0.3–8.3) | 23 (10–43) | 24 (11–47) |
| Boreal forests | 2.0 (0.9–2.9) | 4.6 (0.3–7.6) | 69 (27–147) | 53 (31–157) |
| Tropical savannas | 5.1 (0.2–12) | 4.4 (0–11) | 16 (8.0–81) | 10 (7.0–17) |
| Temperate grasslands | 1.5 (0.3–2.9) | 1.4 (0–4.3) | 38 (12–89) | 45 (17–96) |
| Tundra | 0.5 (0.1–1.0) | 1.5 (0–5.6) | 133 (25–475) | 87 (48–1402) |
| Mediterranean woodlands | 2.4 (0.7–3.7) | 1.5 (0–4.3) | 20 (11–46) | 26 (19–37) |
| Deserts | 0.8 (0.1–2.6) | 0.3 (0–0.4) | 50 (14–174) | 28 (12–57) |
Values are average across 8 biomes based on the World Wildlife Funds 14 eco-regions. The numbers in parentheses are the 10th and 90th percentiles of values in the biome and indicate the scale of spatial heterogeneity