| Table
1. Average concentration
of cations in the bulk precipitation and annual input of cations in
rainwater at Bodie and Ocracoke islands, North Carolina (modified from
van der Valk 1974b). |
|||||
| Potassium | Sodium | Calcium | Magnesium | ||
| Bodie Island | |||||
| Bulk precipitation | (ppm) | 1.30 | 23.00 | 2.30 | 3.90 |
| Rainfall | (ppm) | 0.15
|
7.16 | 1.02 | 1.30 |
| Bulk precipitation | (kg/ha) | 24.00
|
721.00 | 58.00 | 107.00 |
| Rainfall | (kg.ha-1.yr-1) | 2.30 | 118.00 | 16.00 | 21.00 |
| Ocracoke Island | |||||
| Bulk precipitation | (ppm) | 1.00 | 21.00 | 3.40 | 3.00 |
| Rainfall | (ppm) | 0.15
|
4.36 | 0.82 | 0.59 |
| Bulk precipitation | (kg/ha) | 26.00 | 533.00 | 86.00 | 77.00 |
| Rainfall | (kg.ha-1.yr-1) | 2.20 | 65.00 | 12.00 | 8.90 |