The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet

By M. Martin, R. Winkelmann, M. Haseloff, T. Albrecht, Ed Bueler, C. Khroulev, Anders Levermann. 2010

203 citations recorded by the source corpus.

Abstract. We present a dynamic equilibrium simulation of the ice sheet-shelf system on Antarctica with the Potsdam Parallel Ice Sheet Model (PISM-PIK). The simulation is initialized with present-day conditions for bed topography and ice thickness and then run to steady state with constant present-day surface mass balance. Surface temperature and sub-shelf basal melt distribution are parameterized. Grounding lines and calving fronts are free to evolve, and their modeled equilibrium state is compared to observational data. A physically-motivated calving law based on horizontal spreading rates allows for realistic calving fronts for various types of shelves. Steady-state dynamics including surface velocity and ice flux are analyzed for whole Antarctica and the Ronne-Filchner and Ross ice shelf areas in particular. The results show that the different flow regimes in sheet and shelves, and the transition zone between them, are captured reasonably well, supporting the approach of superposition of SIA and SSA for the representation of fast motion of grounded ice. This approach also leads to a natural emergence of sliding-dominated flow in stream-like features in this new 3-D marine ice sheet model.

Subfields: Atmospheric Science, Management, Monitoring, Policy and Law, Pulmonary and Respiratory Medicine

View Paper: https://www.semanticscholar.org/paper/93fd817c86a037a452b45a8826ad99a64fc19184

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Citations in the corpus

Kinematic first-order calving law implies potential for abrupt ice-shelf retreat (2011, methodology): “Eigencalving thus allows to reproduce calving fronts with varying ice thickness as also found in simulations of the whole Antarctic Ice Sheet (Martin et al., 2011).”
The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 1: Model description (2010, methodology): “As a first application,Martin et al. (2011) present a dynamic equilibrium simulation for Antarctica, demonstrating the ability of PISM-PIK to simulate whole sheet-shelf systems. www.the-cryosphere.net/5/715/2011/ The Cryosphere, 5, 715–726, 2011 j+1 j j-1 i i+1i-1 b+ b- a+a- a+S a-N a+N a-S b-W b+W…”
Contribution of Antarctica to past and future sea-level rise (2016, unknown): “The relationship between proximal ocean conditions and melting at the base of floating ice shelves remains a challenging topic of ongoing research 78 , and a simple parameterization 64 Medium-range, default values of OCFAC, CREVLIQ, and VCLIF used in our nominal Pliocene (Extended Data Fig.”
Antarctic sub-shelf melt rates via PICO (2017, background): “Simplistic parameterizations that depend on the local ocean and ice-shelf properties have been applied in long-term and large-scale ice sheet simulations (Joughin et al., 2014; Martin et al., 2011; Pollard and DeConto, 2012; Favier et al., 2014).”