Table 1 The observed mean ice speed from 2018, the observed and modelled rate of change in ice speed, the observed total and percentage change in ice speed from 1994 to 2018.
From: Widespread increase in dynamic imbalance in the Getz region of Antarctica from 1994 to 2018
Flow unit | 2018 Mean speed (m/yr) | Observed rate of speed change (m/yr²) | Modelled rate of speed change (m/yr²) | Observed total speed up over 25 years (m/yr) | Observed percentage speed change over 25 years (%) | Rate of elevation change 1992–2017 (m/yr) | Grounding line migration 1996–2017 (km) | Ice thickness (m) | Bed elevation (m) |
|---|---|---|---|---|---|---|---|---|---|
1 | 173.7 ± 11.5 | 0.7 | 0.8 | 18.6 | 10.7 | 0.0 | −1.3 | 649 | −540 |
2 | 192.2 ± 17.2 | 0.2 | 0.1 | 5.5 | 2.9 | −0.2 | −1.1 | 674 | −594 |
3 | 182.6 ± 14.4 | 1.9 | 1.9 | 46.5 | 25.5 | −0.7 | −2.7 | 639 | −541 |
4 | 390.7 ± 33.3 | 3.7 | 3.4 | 92.4 | 23.6 | −1.0 | – | 775 | −651 |
5 | 532.4 ± 36.1 | 10.5 | 9.1 | 263.4 | 49.5 | −1.6 | – | 728 | −613 |
6 | 668.8 ± 90.8 | 15.6 | 15.2 | 391.2 | 58.5 | −1.8 | – | 851 | −727 |
7 | 424.8 ± 42.2 | 1.0 | 2.1 | 24.5 | 5.8 | −0.5 | −2.5 | 638 | −552 |
8 | 518.8 ± 59.1 | 2.0 | 5.4 | 50.4 | 9.7 | −0.5 | – | 501 | −418 |
9 | 511.2 ± 64.6 | 2.8 | 3.8 | 69.4 | 13.6 | −0.1 | – | 552 | −473 |
10 | 879.2 ± 149.1 | 9.1 | 11.4 | 228.2 | 26.0 | −0.6 | – | 659 | −535 |
11 | 744.3 ± 125.0 | 5.7 | 5.1 | 141.5 | 19.0 | −2.2 | – | 913 | −659 |
12 | 467.8 ± 65.5 | 8.2 | 6.2 | 205.5 | 43.9 | −1.3 | – | 995 | −806 |
13 | 1397.6 ± 163.7 | 11.4 | 6.0 | 285.8 | 20.4 | −0.4 | – | 674 | −524 |
14 | 1281.1 ± 122.6 | 8.0 | 7.3 | 198.9 | 15.5 | −0.6 | – | 701 | −560 |
