2018
DOI: 10.5194/gmd-2018-105
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The GRISLI ice sheet model (version 2.0): calibration and validation for multi-millennial changes of the Antarctic ice sheet

Abstract: Abstract.In this paper we present the GRISLI (Grenoble Ice Sheet and Land Ice) model in its newest revision (version 2.0). Whilst GRISLI is applicable to any given geometry, we focus here on the Antarctic ice sheet because it highlights the importance of grounding line dynamics. Important improvements have been implemented since its original version (Ritz et al., 2001) including notably an explicit flux computation at the grounding line based on the analytical formulations of Schoof (2007) 5 and Tsai et al. … Show more

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Cited by 6 publications
(8 citation statements)
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“…This is likely due in large part to the use of a spatially constant value for ice-shelf basal mass balance, but also reflects the simple approach used to represent β. Nonetheless, the results are quite consistent with other models (e.g., Martin et al, 2011;Quiquet et al, 2018;Seroussi et al, 2019).…”
Section: Model Validation and Benchmarkssupporting
confidence: 91%
See 1 more Smart Citation
“…This is likely due in large part to the use of a spatially constant value for ice-shelf basal mass balance, but also reflects the simple approach used to represent β. Nonetheless, the results are quite consistent with other models (e.g., Martin et al, 2011;Quiquet et al, 2018;Seroussi et al, 2019).…”
Section: Model Validation and Benchmarkssupporting
confidence: 91%
“…(u b ) has units of [yr m −1 ] and the coefficient c b has units of [Pa], which helps to facilitate its physical interpretation.Most commonly, β is defined using a linear (e.g Quiquet et al, 2018),. power-law (e.g.…”
mentioning
confidence: 99%
“…consists in the superposition of the shallow-ice approximation (SIA) velocities for ice flow due to vertical shearing and the shallow-shelf approximation (SSA) velocities, used as a sliding law (Bueler and Brown, 2009). For the initMIP-Antarctica experiments, we used the GRISLI version 2.0 (Quiquet et al, 2018) which includes the analytical formulation of Schoof (2007) to compute the flux at the grounding line. Basal drag is computed with a power-law basal friction (Weertman, 1957).…”
Section: Lsce_grislimentioning
confidence: 99%
“…In the version used here, over the whole domain, the velocity field consists in the superposition of the shallow-ice approximation (SIA) velocities for ice flow due to vertical shearing and the shallow-shelf approximation (SSA) velocities, used as a sliding law (Bueler and Brown, 2009). For the LARMIP experiments, we used the GRISLI version 2.0 (Quiquet et al, 2018) which includes the analytical formulation of (Schoof, 2007) to compute the flux at the grounding line. Basal drag is computed with a power-law basal friction 30 (Weertman, 1957).…”
Section: A5 Gris-lsc: Grenoble Ice Sheet and Land Ice (Grisli)mentioning
confidence: 99%