| in summer | 33 | temporal |
| virtually | 17 | manner |
| by 2015 | 17 | temporal |
| arctic → be → ice-free | 117 |
| arctic → become → ice-free | 26 |
| arctic → go → ice-free | 3 |
| negative | neutral | positive |
| 0.081 | 0.619 | 0.300 |
| Raw frequency | 146 |
| Normalized frequency | 1.000 |
| Modifier score | 1.000 |
| Perplexity | 37.199 |