The highly interactive and variable nature of scales of space and time featured in components of the Earth system imparts enormous complexity to land-atmosphere interactions. Here, we introduce an open special collection on Advances in Scaling and Modeling of Land-Atmosphere Interactions that features articles in JGR: Biogeosciences, JGR: Atmospheres, Journal of Advances in the Modeling of Earth Systems, and Earth & Space Science. Collectively, these articles identify interactions across multiple processes, in field experiments, long-term observations, and numerical simulations, which are then used to advance theories of scale interaction to improve predictive models.