Advancing the predictive power of Earth system models through understanding of the structure and function of Arctic terrestrial ecosystems. The goal of NGEE Arctic is to support the DOE’s Biological and Environmental Research (BER) mission to advance a robust predictive understanding of Earth’s climate and environmental systems by delivering a process-rich ecosystem model, extending from bedrock to the top of the vegetative canopy and atmospheric interface, in which the evolution of Arctic ecosystems in a changing climate can be modeled at the scale of a high-resolution ESM grid cell.