The provided data consists of processed model output data for a range of simulations associated with work under the HECTER project (NEX0102361:Topic A. Hydrogen Emissions: Constraining The Earth system Response). Raw model data were generated using STOCHEM-CRI, a 3D tropospheric chemistry and transport model operating at a resolution of 5x5 degrees. Simulations span a single production year using archived meteorological data from 1998, results for global burden of species and fluxes are reported at a monthly temporal resolution. Further model details will become available at point of publication.