Fig. 2: Observed and modelled accelerations in ice speed.
From: Extensive inland thinning and speed-up of Northeast Greenland Ice Stream
Time series of daily solutions of ice speed at NEG3 (a), NEG2 (b) and NEG1 (c). The red error bars denote the mean monthly speed and associated root-mean-square error. The black line denotes the best-fitting trend. The mean flow accelerations in m year−2 from GNSS data (GNSS) and from mosaics based on ESA Sentinel-1 SAR offset tracking (SAT) are listed for each site. d, Map of the observed ice flow acceleration from 2016 to 2022. e, Map of modelled ice flow acceleration in m year−2 from 2016 to 2021 using NorESM1, RCP4.5 and regularized Coulomb friction law. f, Modelled ice flow using Budd friction law (linear viscous). g, Modelled ice flow using Budd friction law with a friction coefficient of 1/3. h, Modelled ice flow using Budd friction law with a friction coefficient of 1/6. i, Modelled ice flow using Schoof friction law. j, Modelled ice flow using Weertman friction law with a friction coefficient of 1/3. Map of modelled ice flow acceleration in m year−2 using NorESM1, RCP4.5 and regularized Coulomb friction law for the periods 2020–2040 (k), 2040–2060 (l), 2060–2080 (m) and 2080–2100 (n). Colour bar: red denotes acceleration and blue denotes slowdown. The image was prepared using MATLAB R2021a software.
