OCO-based CO₂ Growth Rate is Adopted by the Global Carbon Project

Atmospheric CO₂ growth rate is a fundamental metric that links changes in radiative forcing to the broader climate system. OCO-based CO₂ growth rate has been incorporated into the Global Carbon Project (GCP), see Friedlingstein et al. [2025], for the first time in the 2025 assessment. The inclusion of the OCO-based decadal CO₂ growth rate in the GCP assessment, which is widely used by global policy makers and the scientific community, underscores both the stability and accuracy of the OCO CO₂ retrievals and the growing value of its long observational record.