Table 2.
Diffusive flux rates (J) of various geochemical constituents in the SWIR ridge valley areas A2 and A3.
| Station | Sample ID | Environment | Constituent | Ds |
J |
Flux direction |
|---|---|---|---|---|---|---|
| m2 a-1 | mmol m-2 a-1 | |||||
| PS81/659 | A2 | Surface (0–20 cm) | Nitrate | 2.58 10-2 | -14 | Downward (upper 5.0 cm) |
| PS81/656 | A2 | Subsurface (50–550 cm) | Sulfate | 1.33 10-2 | -1 | Downward |
| Ammonium | 2.58 10-2 | 1 | Upward | |||
| PS81/661 | A3 | Surface (0–20 cm) | Sulfide | 2.54 10-2 | 34 | Upward |
| DIC | 1.38 10-2 | 600 | Upward | |||
| Ammonium | 2.58 10-2 | 138 | Upward | |||
| Nitrate | 2.58 10-2 | -8 | Downward (upper 5.5 cm) | |||
| PS81/657 | A3 | Subsurface (50–550 cm) | Sulfate | 1.33 10-2 | -4 | Downward |
| Sulfide | 2.54 10-2 | 0.8 | Upward | |||
| DIC | 1.38 10-2 | 5 | Upward | |||
| Ammonium | 2.58 10-2 | 1 | Upward | |||
| PS81/636 | A3m | Surface (0–45 cm) | Sulfide | 2.59 10-2 | 10 | Upward |
| DIC | 1.37 10-2 | 32 | Upward | |||
| Ammonium | 2.59 10-2 | 14 | Upward | |||
| Nitrate | 2.58 10-2 | -17 | Downward (upper 3.5 cm) |
Ds, sediment diffusion coefficient; J, diffusive flux rate; DIC, dissolved inorganic carbon.