RT Journal Article T1 Canopy height and biomass distribution across the forests of Iberian Peninsula A1 Su, Yang A1 Schwartz, Martin A1 Fayad, Ibrahim A1 García, Mariano A1 Zavala, Miguel A. A1 Tijerín-Triviño, Julián A1 Astigarraga, Julen A1 Cruz Alonso, Verónica A1 Liu, Siyu A1 Zhang, Xianglin A1 Chen, Songchao A1 Ritter, François A1 Besic, Nikola A1 d’Aspremont, Alexandre A1 Ciais, Philippe AB Accurate mapping of vegetation canopy height and biomass distribution is essential for effective forest monitoring, climate change mitigation, and sustainable forestry. Here we present high-resolution remote sensing-based canopy height (10 m resolution) and above ground biomass (AGB, 50 m resolution) maps for the forests of the Iberian Peninsula from 2017 to 2021, using a deep learning framework that integrates Sentinel-1, Sentinel-2, and LiDAR data. Two UNET models were developed: one trained on Airborne Laser Scanning (ALS) data (MAE: 1.22 m), while another using Global Ecosystem Dynamics Investigation (GEDI) footprints (MAE: 3.24 m). External validation with 6,308 Spanish National Forest Inventory (NFI) plots (2017–2019) confirmed canopy height reliability, showing MAEs of 2–3 m in tree-covered areas. AGB estimates were obtained through Random Forest models that linked UNET derived height predictions to NFI AGB data, achieves an MAE of ~29 Mg/ha. The creation of high-resolution maps of canopy height and biomass across various forest landscapes in the Iberian Peninsula provides a valuable new tool for environmental researchers, policy makers, and forest management professionals, offering detailed insights that can inform conservation strategies, carbon sequestration efforts, and sustainable forest management practices. PB Nature Research YR 2025 FD 2025-04 LK https://hdl.handle.net/20.500.14352/120649 UL https://hdl.handle.net/20.500.14352/120649 LA eng NO Su, Y., Schwartz, M., Fayad, I. et al. Canopy height and biomass distribution across the forests of Iberian Peninsula. Sci Data 12, 678 (2025). https://doi.org/10.1038/s41597-025-05021-9 NO Acknowledgements:MAZ, JTT, JA and VCA acknowledge support from the Spanish Ministry of Science and Innovation (grant LARGE, Nº PID2021-123675OB-C41, Agencia Estatal de Investigación). MG acknowledges support from the Spanish Ministry of Science and Innovation (grant REMOTE, Nº PID2021-123675OB-C42). VCA was supported by the Ministry of Universities, Spain, and Next Generation-EU, with “Maria Zambrano” fellowship. PC acknowledges support from the European Space Agency Climate Space RECCAP2-CS project (ESA ESRIN/4000144908) and the CALIPSO project funded by the generosity of Schmidt Science. YS, PC, MS, IF and AD are supported by the French German project AI4FOREST (ANR-22-FAI1-0002-01) funded by ANR and DLR. NO European Commission (EU) NO Ministerio de Ciencia e Innovación (España) NO Agencia Estatal de Investigación (España) NO Ministerio de Universidades (España) NO European Space Agency NO Agence Nationale de la Recherche (France) NO Deutsches Zentrum für Luft- und Raumfahrt (Deutschland) NO Schmidt Science DS Docta Complutense RD 16 jul 2025