Table 1 Midgardsormen grounding line migration

From: Large ice loss variability at Nioghalvfjerdsfjorden Glacier, Northeast-Greenland

Date of landsat scene

Total displacement (m)

Ice thickness (m)

Relative thickness change (m/year)

14-08-1994

−682 ± 60

  

25-07-1998

0

282 ± 6.4

 

26-06-2001

391 ± 60

282 ± 6.4

−0.14 ± 2.2

10-06-2002

531 ± 60

269 ± 6.4

−12.83 ± 6.7

20-07-2005

841 ± 60

243 ± 6.4

−8.28 ± 2.1

31-07-2006

911 ± 60

242 ± 6.4

−1.15 ± 6.2

11-08-2007

946 ± 60

240 ± 6.4

−2.69 ± 6.2

08-08-2009

998 ± 60

236 ± 6.4

−1.79 ± 3.2

16-07-2010

1076 ± 60

224 ± 6.4

−13.10 ± 6.8

07-07-2012

1227 ± 60

209 ± 6.4

−7.41 ± 3.2

12-07-2014

1402 ± 60

196 ± 6.4

−6.50 ± 3.2

  1. Observed northward displacement of Midgardsormen between 1994 and 2014 based on the available Landsat scenes. Ice thickness and its changes are derived from the displacement, the known bed topography and the floatation criterion of the ice shelf. The error calculations are discussed in the Methods section