Integrated Modeling for Chemistry of Indoor Environments: Progress and Future Perspectives

The Modeling Consortium for Chemistry of Indoor Environments (MOCCIE) develops and integrates various indoor models across a wide range of spatial and temporal scales, including molecular dynamics simulations, kinetic process models, gas-phase and aerosol chemistry models, and computational fluid dynamic simulations. We take a holistic approach to apply our models to numerous laboratory experiments and indoor field campaigns to constrain model parameters, gain molecular- and process-level understanding, and extrapolate to different building operating conditions. We summarize our major findings of model applications to cross-cutting themes, including partitioning and reactions on indoor surfaces, human skin ozonolysis to form the human oxidation field, oxidation of volatile organic compounds to generate semivolatile organic compounds and secondary organic aerosols, and spatial distributions of indoor compounds around human occupants and in rooms. Finally, we discuss future perspectives of indoor chemistry modeling, including indoor emissions as a source of outdoor air pollutants and the impacts of climate change on indoor chemistry.