evidence: Under RCP 8.5, the likely range of GMSL rise is 0.63–1.32 m, the very likely range is 0.45–1.65 m, and the median is 0.93 m by 2100. By 2300, the likely range is 1.67–5.61 m, the very likely range is 0.88–7.83 m, and the median is 3.29 m (Table 1). [...] A recent structured expert judgment15, focusing on ice sheet contributions to GMSL presented a likely range of 0.8–1.7 m, and a very likely range of 0.6–2.4 m for GMSL rise in 2100 under a high emission scenario that is roughly comparable to RCP 8.5. There are obvious differences between the ranges derived from the structured expert judgment and our expert survey, particularly in the magnitude of the upper tails of the distributions. The structured expert judgment15 provided combined ice sheet sea-level rise contributions, which alone show a very likely range of 0.1–1.8 m by 2100 under the high emission scenario. This potentially suggests a difference between GMSL projections from experts with a primary expertise in ice sheets15, and GMSL projections from the field more broadly, as in our survey, where there was a relatively equal distribution of respondents with primary expertise in statistical or physical process modeling (32%), data collection or processing (35%), and impacts of sea-level rise (30%). From tiered questions, 13% of respondents in our survey identified ice-sheets as their expertise (Supplementary Information). [...] Church, J. A. et al. Sea-level rise by 2100. Science342, 1445–1445 (2013).