The Cryosphere
The Cryosphere
TC
Articles | Volume 14, issue 7
Articles | Volume 14, issue 7
https://doi.org/10.5194/tc-14-2429-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-14-2429-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 14, issue 7
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, Ilka Weikusat, Johannes H. P. de Bresser, Daniela Jansen, Gill M. Pennock, and Martyn R. Drury

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

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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.
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