Zero Emissions Commitment Depends on Warming Level
A Met Office Hadley Center-led study finds that warming after CO₂ emissions stop depends on how much the planet has already warmed.
Updated on Nov. 15, 2026 in Environmental
Live Poll
Is it now urgent to cut emissions quickly to limit future warming?
A study led by the Met Office Hadley Center found that global temperature after human CO₂ emissions stop depends on how much warming has already occurred. Using the UK Earth System Model, the researchers found temperature stayed roughly stable at warming levels up to 2°C above preindustrial levels.
Why it matters
The zero emissions commitment has often been assumed to be close to zero, so this finding suggests continued warming after emissions cease may be larger at higher temperatures. The results could inform how policymakers think about the consequences of delayed emissions cuts.
The model showed a further 0.4°C to 0.6°C of warming 150 years after emissions stopped at warming levels of 3°C to 5°C above preindustrial temperatures. Whether other climate models reproduce these figures has not been established.
The players
Met Office Hadley Center
The United Kingdom's national weather service research center, which led the study and contributes to international climate modeling.
University of Liverpool
A UK university whose researcher Ric Williams co-authored the study.
The details
The study simulated what happens when CO₂ emissions stop at different levels of warming. At higher warming levels, the Earth's energy imbalance was larger and the cooling effect of land and ocean absorbing CO₂ was weaker, so the planet kept warming for longer.
Timeline
150 years after emissions stop: the model's projected further warming at high warming levels
Season Trajectory
The study tests the long-held assumption that the zero emissions commitment is close to zero, using the UK Earth System Model (UKESM1.2) to show that post-emissions warming grows with the warming level already reached. This adds to a body of climate-model work that informs global emissions targets.
Understanding how much warming continues after emissions stop helps clarify how quickly emissions cuts must occur to limit long-term temperature rise. The findings suggest that delayed action may carry larger future warming costs at higher temperature levels.
The takeaway
Cutting emissions earlier matters more at higher warming levels, because the planet can keep warming for decades after emissions stop. Continued monitoring with multiple climate models will help confirm these results.
Further reading
Explore more on Environmental climate research and emissions science.
Source note: This article includes information reported by Phys.
Live Poll
Is it now urgent to cut emissions quickly to limit future warming?
