In:
The Cryosphere, Copernicus GmbH, Vol. 14, No. 7 ( 2020-07-21), p. 2283-2301
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
1994-0424
DOI:
10.5194/tc-14-2283-2020
Language:
English
Publisher:
Copernicus GmbH
Publication Date:
2020
detail.hit.zdb_id:
2393169-3
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