CO2Budgets
CO2Budgets refers to the framework for quantifying the maximum cumulative emissions of carbon dioxide (CO2) allowed into the atmosphere to meet a specified climate target, typically a limit on global average temperature rise relative to pre-industrial levels. The concept rests on the fact that CO2 persists in the atmosphere for long periods and that total cumulative emissions are a primary driver of long‑term warming.
Global carbon budgets are commonly expressed in gigatonnes of CO2 (GtCO2) and are linked to targets such
Budgets can be conceptually allocated across regions or sectors, and equity considerations—such as per‑capita rights and
Limitations include dependence on uncertain future forcings and climate responses, the treatment of non‑CO2 effects, and