Transient Climate Response to Cumulative CO₂ Emissions (TCRE)

The Transient Climate Response to Cumulative Carbon Dioxide Emissions (TCRE) is a scientific metric that quantifies the near-linear relationship between cumulative carbon dioxide emissions and global mean surface temperature rise. This finding has been pivotal in shaping the concept of a finite global carbon budget, directly linking cumulative emissions with specific warming thresholds, such as 1.5°C or 2°C. TCRE underpins much of the Intergovernmental Panel on Climate Change (IPCC) assessment work and informs international mitigation targets by demonstrating the long-lasting warming effect of carbon dioxide.