Earth's equilibrium climate sensitivity to doubled CO2 is closer to 3.5°C than 4.5°C

Added to korrents 20 Sept 2026 · How quotes work · Something wrong? Tell us

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• The IPCC would likely have assessed a warming range of 0.4-0.8°C rather than 0.3-0.7°C if improved observational datasets had been available. EHEd Hawkins14 Apr 2026
• There is a 77% chance of global warming exceeding 3C by 2150 under current policies. ZHZeke Hausfather22 Sept 2026
• The global land surface is warming approximately 50% faster than the global average. ZHZeke Hausfather22 Sept 2026
• The IPCC AR5 near-term warming assessment was reasonable given the published evidence at the time. EHEd Hawkins14 Apr 2026
• To keep global warming below 2 degrees Celsius over pre-industrial levels by 2100, it may become increasingly likely that negative carbon emissions will be required. JBJohn Baez12 Jan 2020

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