Table 2.
Areas of drained peatland (kha) by climate zone and land use category according to the Global Peatland Database, together with aggregated emission factors.
| Climatic zone | Land use category | Area (kha) | CO2 (t ha−1 a−1) | CH4 (kg ha−1 a−1) | N2O (kg ha−1 a−1) |
|---|---|---|---|---|---|
| Boreal | Forest | 5474 | 2.5 | 9.8 | 2.6 |
| Cropland | 262 | 27.9 | 58.3 | 19.4 | |
| Deep-drained grassland | 426 | 20.2 | 59.6 | 14.2 | |
| Shallow-drained grassland | 0 | — | — | — | |
| Agriculture | 3420 | 24.1 | 43.0 | 16.8 | |
| Peat extraction | 333 | 10.2 | 32.9 | 0.5 | |
| Rewetted | — | −1.3 | 123.6 | 0 | |
| Temperate | Forest | 6315 | 10.3 | 7.9 | 4.3 |
| Cropland | 2528 | 28.6 | 58.3 | 19.4 | |
| Deep-drained grassland | 3405 | 22.3 | 73.5 | 12.3 | |
| Shallow-drained grassland | 2422 | 13.6 | 63.4 | 2.4 | |
| Agriculture | 8389 | 21.0 | 55.8 | 10.1 | |
| Peat extraction | 662 | 10.8 | 32.9 | 0.5 | |
| Rewetted | — | −0.4 | 205.9 | 0 | |
| Tropical | Forest | 7235 | 22.0 | 50.0 | 3.7 |
| Cropland | 305 | 45.0 | 118.9 | 4.2 | |
| Deep-drained grassland | 70 | 37.4 | 52.0 | 7.7 | |
| Shallow-drained grassland | 0 | — | — | — | |
| Agriculture | 9314 | 42.5 | 96.6 | 5.4 | |
| Peat extraction | 8 | 10.1 | 32.9 | 5.6 | |
| Rewetted | — | 1.9 | 166.5 | 0 |
Emission factors assumed for rewetted peatlands are also shown for each climatic zone.