TABLE 2.
Concentrations of DIC, organic acids, and selected ions in source waters sampled from 13 YNP hot springs
| pH group and site | DIC concn (mM) | Concna (μM) |
||||||
|---|---|---|---|---|---|---|---|---|
| Formate | Acetate | S22− | Fe2+ | NH4(T) | NO2− | NO3− | ||
| Acidic (pH <4.0) | ||||||||
| A(LC) | 0.7 | 1.6 | BD (0.8) | 14.0 | 7.2 | 261.3 | BD (0.1) | 1.6 |
| A(AS) | 37.1 | 26.6 | 20.2 | BD (0.3) | 207.7 | 552.0 | BD (0.1) | BD (0.2) |
| A(DS) | 0.3 | 0.8 | BD (0.8) | 24.9 | 21.8 | 67.5 | 0.8 | 43.5 |
| Moderately to slightly acidic (pH 4.0–6.9) | ||||||||
| MA(CP) | 1.2 | BD (0.1) | BD (0.8) | 6.2 | 4.7 | 392.2 | BD (0.1) | 9.7 |
| MA(HG) | 0.1 | 0.8 | BD (0.8) | 3.7 | 9.7 | 134.5 | 2.5 | BD (0.2) |
| MA(EP) | 2.4 | BD (0.1) | BD (0.8) | BD (0.3) | 1.4 | 66.4 | BD (0.1) | BD (0.2) |
| MA(OP) | 1.0 | 0.2 | BD (0.8) | 0.3 | 3.2 | 6.5 | BD (0.1) | BD (0.2) |
| MA(CT) | 1.7 | BD (0.1) | BD (0.8) | 5.3 | 1.6 | 28.2 | BD (0.1) | 29.0 |
| Neutral to alkaline (pH >7.0) | ||||||||
| NA(PS) | 0.1 | BD (0.1) | BD (0.8) | 1.6 | 1.2 | 15.3 | BD (0.1) | BD (0.2) |
| NA(BP) | 6.0 | BD (0.1) | BD (0.8) | BD (0.3) | BD (1.0) | BD (1.2) | BD (0.1) | 19.4 |
| NA(RCS) | 2.8 | 0.9 | 2.0 | BD (0.3) | BD (1.0) | 5.9 | 16.4 | BD (0.2) |
| NA(FC) | 4.9 | BD (0.1) | BD (0.8) | 11.8 | BD (1.0) | BD (1.2) | BD (0.1) | 27.4 |
| NA(RCN) | 2.8 | 1.3 | 2.1 | 16.2 | BD (1.0) | 10.0 | 5.4 | 38.7 |
a
BD, below the detection limit (the detection limit is given in parentheses).