Multisite Observations of the Oxygen Isotope Anomaly in Surface Ozone Across China Indicate an Imprint of Stratosphere-Troposphere Exchange.
The mass-independent oxygen-17 anomaly in ozone (Δ17O-O3) provides a unique constraint on atmospheric transport and oxidation processes, yet its spatial variability over continental regions remains poorly characterized. Here, we present the first multisite observations of surface Δ17O-O3 reported to date across China,...