Table 2.
Total deposition of NHx-N, NOy-N and total N on worlds terrestrial ecosystems for the year 2010. All data are based on an overlay of the Global Land Cover map (GLC 2000) and HTAP multi-model ensemble results, averaged at 1° × 1°.
| Land use class | Area (Million km2) | NHx-N (Tg N yr−1) | NOy-N (Tg N yr−1) | Total N (Tg N yr−1) | Average N inputs1 (kg N ha−1 yr−1) |
|---|---|---|---|---|---|
| Forest | 42.9 | 10.3 | 12.3 | 22.5 | 5.3 |
| Semi natural vegetation/grassland | 44.5 | 9.6 | 9.6 | 19.2 | 4.3 |
| Croplands | 18.6 | 13.5 | 9.7 | 23.2 | 12.5 |
| Other land | 24.5 | 2.1 | 3.4 | 5.4 | 2.2 |
| Total | 130.6 | 35.4 | 35.0 | 70.3 | 5.4 |