A 20 m spatial resolution peatland extent map of Alaska

作者：Mark J. Lara, Roger Michaelides, Duncan Anderson, Wenqu Chen, Emma Hall, Caroline Ludden, Aiden I. G. Schore, Umakant Mishra, Sarah Scott · 发表于：Scientific Data · 年份：2025 · DOI：10.1038/s41597-025-04502-1 · 被引用次数：6 · 研究领域：Peatlands and Wetlands Ecology、Climate change and permafrost、Arctic and Antarctic ice dynamics

Peatlands are prevalent across northern regions, including bogs, fens, marshes, meadows, and select tundra wetlands that all vary in size (e.g., 0.01 s to 10 s km 2 ) and shape (e.g., circular to elongated). However, our best remotely sensed products describing the regional-scale distribution of peatland extents are constrained to 1 km 2 pixels, often representing notable sub-pixel heterogeneity and local-scale uncertainties. Here we develop a new 20 m spatial resolution wall-to-wall ~1.5 million km 2 peatland map of Alaska, using peat cores, ground observations, and sub-meter resolution image interpretation. Ground-data were used to train machine learning classifiers to detect peatlands using a fusion of Sentinel-1 (Dual-polarized Synthetic Aperture Radar), Sentinel-2 (Multi-Spectral Imager), and derivatives from the Arctic Digital Elevation Model (ArcticDEM), that were spatially constrained by a peatland suitability model. Statewide peatland mapping ( overall agreement: 85%) identified peatlands to cover 4.6, 10.4, and 5.3% of polar, boreal, and maritime ecoregions, respectively, and 7.3% of the total terrestrial land area. This new dataset will improve the representation of peatland carbon, nutrient, and fire dynamics across Alaska.