claim: The Schmittner et al. study finds low probability of both very low and very high climate sensitivities, and its lower estimate ( as compared to the IPCC ) is based on a new temperature reconstruction of the Last Glacial Maximum that may or may not withstand the test of time.
evidence: Compared to the previous report, the lower bounds for the sensitivity of the climate system to emissions were slightly lowered, though the projections for global mean temperature rise ( compared to pre-industrial levels ) by 2100 exceeded 1.5 °C in all scenarios.