Data and code for: Northward expansion of high-stature vegetation reveals net surface-cooling feedbacks in the majority of canadian boreal-tundra ecozones

This dataset contains the analysis code, workflows, and supporting geospatial datasets developed for the study *Northward Expansion of High-Stature Vegetation Reveals Net Surface-Cooling Feedbacks in the Majority of Canadian Boreal–Tundra Ecozones* (Amaogu et al., 2025). The repository includes Python scripts, processed vegetation and land-cover products, NDVI trend analyses, and seasonal surface energy flux trend datasets used to generate the figures and results reported in the manuscript. Supporting spatial outputs are provided in an ESRI File Geodatabase containing final vegetation, land-cover, and energy-flux trend products. These materials are provided to facilitate transparency, reproducibility, and reuse of the analyses presented in the study.