Table 1.
Major ions in Vostok glacial ice at a depth of 3,300 m and in accretion ice at ≈3,600 m
| Ion or compound | Glacial ice (4 × 105
years)
|
Accretion ice (filtered)
|
||
|---|---|---|---|---|
| ng/g | Bulk molarity, μM | ng/g | Bulk molarity, μM | |
| SO42− | 122 | 1.24 | 38 | 0.39 |
| NaCl in solid grains | 58.2 | 1 | — | — |
| NO3− | 18.6 | 0.3 | 10 | 0.164 |
| Na+ | — | — | 29 | 1.26 |
| Cl− | 5 | 0.14 | 37.6 | 1.06 |
| CH3SO3− | 7.99 | 0.084 | — | — |
| HCOO− | 0.95 | 0.02 | — | — |
| CH3COO− | 0.77 | 0.013 | — | — |
| Mg2+ | — | — | 7.6 | 0.32 |
| Ca2+ | — | — | 9.7 | 0.24 |
| Acidity in bulk | — | ≈2 | — | ≈0 |
| DOC (ref. 15) | ? | ? | ? | ≈7 |
| DOC (ref. 14) | — | — | ∼500 | ? |
DOC, dissolved organic carbon of unknown composition.