Destabilization of the WAIS in the unperturbed reference simulation

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Fig. 1 Destabilization of the WAIS in the unperturbed reference simulation. Destabilization of the WAIS in the unperturbed reference simulation. (A) Grounding line and calving front of present-day observed state (green contours) and evolution of grounding line position during self-sustained retreat (colored contours, 750-year time steps), underlaid by bed topography (blue shading). The mass addition region used in the perturbation simulations is highlighted by the white sector, within which mass deposition is restricted to ice sheet areas that have been grounded at the onset of the perturbation. Insets show the state of the Antarctic Ice Sheet as observed (B) and after simulated collapse of the WAIS (C). Hatched area refers to the region outside the model domain, and blue rectangle indicates region shown in (A). Johannes Feldmann et al. Sci Adv 2019;5:eaaw4132 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).