Results of the third Marine Ice Sheet Model Intercomparison Project (MISMIP+)

Cornford, Stephen L., Seroussi, Helene, Asay-Davis, Xylar, Gudmundsson, Hilmar, Arthern, Rob, Borstad, Chris, Christmann, Julia, Dias dos Santos, Thiago, Feldmann, Johannes, Goldberg, Daniel, Hoffman, Matthew J., Humbert, Angelika, Kleiner, Thomas, Leguy, Gunter, Lipscomb, William H., Merino, Nacho, Durand, Gaël, Morlighem, Mathieu, Pollard, David, Rückamp, Martin, Williams, C. Rosie and Yu, Hongju (2020) Results of the third Marine Ice Sheet Model Intercomparison Project (MISMIP+). The Cryosphere, 14 (7). pp. 2283-2301. ISSN 1994-0424

[img]
Preview
Text
tc-14-2283-2020.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (4MB) | Preview
Official URL: https://doi.org/10.5194/tc-14-2283-2020

Abstract

We present the result of the third Marine Ice Sheet Model Intercomparison Project, MISMIP+. MISMIP+ is intended to be a benchmark for ice-flow models which include fast sliding marine ice streams and floating ice shelves and in particular a treatment of viscous stress that is sufficient to model buttressing, where upstream ice flow is restrained by a downstream ice shelf. A set of idealized experiments first tests that models are able to maintain a steady state with the grounding line located on a retrograde slope due to buttressing and then explore scenarios where a reduction in that buttressing causes ice stream acceleration, thinning, and grounding line retreat. The majority of participating models passed the first test and then produced similar responses to the loss of buttressing. We find that the most important distinction between models in this particular type of simulation is in the treatment of sliding at the bed, with other distinctions – notably the difference between the simpler and more complete treatments of englacial stress but also the differences between numerical methods – taking a secondary role.

Item Type: Article
Subjects: F600 Geology
F700 Ocean Sciences
F800 Physical and Terrestrial Geographical and Environmental Sciences
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Elena Carlaw
Date Deposited: 24 Jul 2020 10:10
Last Modified: 08 Sep 2020 14:30
URI: http://nrl.northumbria.ac.uk/id/eprint/43871

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics