evidence: In recent decades, meltwater runoff from the GrIS has accelerated relative to global surface temperatures17 and there are precursor signals of an impending critical transition detectable in ice cores from the central-western GrIS18. There is, therefore, a need to explore the future trajectories of the GrIS under different emission scenarios. Furthermore, it is important to understand what is required to prevent a runaway effect. The so-far insufficient efforts to reduce global emissions make it necessary to investigate scenarios in which we do not achieve current warming targets, such as those defined in the Paris Agreement, by the end of the twenty-first century19,20,21. Different options to remove CO2 from the atmosphere, including carbon capture and storage technologies and large-scale reforestation, could make it possible to maintain such temperature goals in the long term, even if a temporary overshoot occurs22. These subsequent efforts to reduce GMTs after ad 2100 could have a substantial mitigating effect because many of the large-scale components of the climate system change slowly compared with the current rate of global warming. [...] Pattyn, F. et al. The Greenland and Antarctic ice sheets under 1.5 °C global warming. Nat. Clim. Change8, 1053–1061 (2018). [...] Noël, B., van Kampenhout, L., Lenaerts, J. T. M., van de Berg, W. J. & van den Broeke, M. R. A 21st century warming threshold for sustained Greenland ice sheet mass loss. Geophys. Res. Lett.48, e2020GL090471 (2021).