The SynFlux dataset of atmosphere-biosphere fluxes of ozone is now published in Biogeosciences. Jason’s paper demonstrates that ozone uptake by vegetation can be accurately calculated at flux tower sites in the United States and Europe, even without local ozone measurements. SynFlux dramatically expands the spatial and temporal coverage of ozone flux data, by orders of magnitude, for evaluating atmospheric chemistry models and assessing air pollution impacts on vegetation. Our ongoing work is developing these applications.