Articles | Volume 14, issue 7
The Cryosphere, 14, 2429–2448, 2020
https://doi.org/10.5194/tc-14-2429-2020
The Cryosphere, 14, 2429–2448, 2020
https://doi.org/10.5194/tc-14-2429-2020

Research article 27 Jul 2020

Research article | 27 Jul 2020

Using a composite flow law to model deformation in the NEEM deep ice core, Greenland – Part 1: The role of grain size and grain size distribution on deformation of the upper 2207 m

Ernst-Jan N. Kuiper et al.

Data sets

Large area scan macroscope images from the NEEM ice core Kipfstuhl, Sepp https://doi.pangaea.de/10.1594/PANGAEA.743296

Structural grain parameters from image analysis of large area scan macroscope images from the NEEM ice core Ilka Weikusat, Tobias Binder, and Sepp Kipfstuhl https://doi.org/10.1594/PANGAEA.743296

A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation Ilka Weikusat, Ernst-Jan N. Kuiper, Johannes H. P. de Bresser, Daniela Jansen, Gillian M. Pennock, and Martyn R. Drury https://doi.org/10.1594/PANGAEA.920005

Short summary
A composite flow law model applied to crystal size distributions from the NEEM deep ice core predicts that fine-grained layers in ice from the last Glacial period localize deformation as internal shear zones in the Greenland ice sheet deforming by grain-size-sensitive creep. This prediction is consistent with microstructures in Glacial age ice.