Table 3.
Total deposition of NHx-N, NOy-N and total N on global forest biomes (topical, subtropical, temperate and boreal) based on an overlay of the Global Forest Monitoring Project data and the deposition at 1° × 1° in 2010, as calculated with EMEP rv4.17 model, based on forest-specific values (first value) and grid-average values (value in brackets) in areas with >5% forest cover.
| Forest biome | Area (Million km2) | NHx-N dep (Tg N yr−1) | NOy-N dep (Tg N yr−1) | Total N dep (Tg N yr−1) | Average N dep1 (kg N ha−1 yr−1) |
|---|---|---|---|---|---|
| Total | 32.2 | 11.9 (10.8) | 11.1 (9.8) | 23.0 (20.6) | 7.1 (6.4) |
| Tropical | 16.9 | 6.1 (5.6) | 6.1 (5.5) | 12.1 (11.1) | 7.2 (6.6) |
| Subtropical | 3.5 | 3.1 (2.8) | 1.9 (1.7) | 5.1 (4.5) | 14.6 (13) |
| Temperate | 7.2 | 2.5 (2.1) | 2.7 (2.3) | 5.2 (4.4) | 7.3 (6.2) |
| Boreal | 4.6 | 0.2 (0.2) | 0.3 (0.3) | 0.6 (0.5) | 1.2 (1.2) |
1
Average N deposition was derived by dividing the total N deposition by the area.