Table 5.
TDEP (WDEP+DDEP, units of kg N ha−1 for nitrogen deposition including TNO3, NHX and TIN, and kg S ha−1 for TSO4) in 1990 and 2010 for the 10 ecoregions.
| ID | Regions Name | TNO3 | NHX | TIN | TSO4 | ||||
|---|---|---|---|---|---|---|---|---|---|
|
| |||||||||
| 1990 | 2010 | 1990 | 2010 | 1990 | 2010 | 1990 | 2010 | ||
|
| |||||||||
| 5 | Northern Forests | 4.21 | 2.19 | 2.35 | 2.56 | 6.56 | 4.74 | 9.86 | 3.56 |
| 6 | Northwestern Forested Mountains | 1.36 | 1.12 | 0.91 | 1.26 | 2.27 | 2.38 | 1.75 | 1.47 |
| 7 | Marine West Coast Forest | 1.07 | 1.35 | 2.00 | 2.43 | 3.7 | 3.78 | 5.03 | 3.95 |
| 8 | Eastern Temperate Forests | 6.12 | 3.27 | 3.96 | 4.68 | 10.08 | 7.94 | 17.54 | 6.66 |
| 9 | Great Plains | 2.45 | 1.84 | 2.77 | 3.97 | 5.22 | 5.81 | 3.36 | 2.16 |
| 10 | North American Deserts | 1.49 | 1.12 | 0.83 | 1.01 | 2.32 | 2.13 | 1.34 | 1.05 |
| 11 | Mediterranean California | 3.15 | 2.08 | 2.68 | 3.36 | 5.84 | 5.44 | 1.68 | 1.74 |
| 12 | Southern Semi-arid Highlands | 1.68 | 1.10 | 1.18 | 0.93 | 2.86 | 2.03 | 2.87 | 0.92 |
| 13 | Temperate Sierras | 2.00 | 1.48 | 0.91 | 1.02 | 2.91 | 2.5 | 2.33 | 1.2 |
| 15 | Tropical Wet Forests | 4.11 | 3.35 | 1.27 | 2.05 | 5.38 | 5.41 | 5.15 | 3.77 |