Table 1b. Annual mean atmospheric deposition, throughfall, stemflow and net canopy exchange for a high elevation red fir site in the Great Smokey Mountain National Park, North Carolina(+). This site experiences relatively high inputs of anthropogenic pollutants and a large component of fog/cloud inputs.
| H2O | S | NO3-N | Cl | H | NH4-N | K | Na | Ca | Mg |
|---|
| (cm) | kg/ha/yr |
|---|
| Gas | | 4.1 | 8.6 | | 0.9 | | | | | |
| Particulate | | 4.7 | 1.9 | 0.7 | 0.01 | 1.6 | 0.5 | 0.8 | 7.4 | 0.6 |
|---|
| Total dry deposition | | 8.8 | 10.5 | 0.7 | 0.9 | 1.6 | 0.5 | 0.8 | 7.4 | 0.6 |
|---|
| Precipitation | 203 | 9.5 | 3.2 | 3.2 | 0.5 | 3.1 | 0.7 | 1.1 | 2.6 | 0.6 |
|---|
| Fog/Cloud | 41 | 17.1 | 3.7 | 10.3 | 0.5 | 5.1 | 5.4 | 5.6 | 6.0 | 1.1 |
|---|
| Total Deposition | 244 | 35.4 | 17.4 | 14.2 | 1.9 | 9.8 | 6.6 | 7.5 | 16.0 | 2.3 |
|---|
| Throughfall | 215 | 39.4 | 12.1 | 16.2 | 2.2 | 3.1 | 15.8 | 6.8 | 17.9 | 3.4 |
|---|
| Stemflow | 1 | 0.8 | 0.01 | 0.2 | 0.01 | 0.01 | 0.5 | 0.1 | 0.5 | 0.1 |
|---|
| Throughfall+Stemflow | 216 | 40.2 | 12.1 | 16.4 | 2.2 | 3.1 | 16.3 | 6.9 | 18.4 | 3.5 |
|---|
| Net Canopy Exchange(*) | | 4.8 | -5.3 | 2.2 | 0.3 | -6.7 | 9.7 | -0.6 | 2.4 | 1.2 |
|---|
(+) Data adapted from Johnson and Lindberg,1992
(*) Net canopy exchange=total deposition-(throughfall + stemflow)