This study presents high-precision measurements of ∆^′17O(CO₂). Key findings include the extension of the N₂O–∆^′17O correlation to the upper troposphere and the identification of significant differences in the N₂O–∆^′17O slope in StratoClim samples. Additionally, the ∆^′17O measurements are used to estimate global stratospheric production and surface removal of ∆^′17O, providing an independent estimate of global vegetation CO₂ exchange.