Global ensemble peatland, bare rock and bare sand extent at 100 m to 1 km spatial resolution based on multisource data

Ensemble estimate of the global distribution of peatlands / extent (peatland.extent_multi_p). This is a simple average from five (5) sources of data:

1. WRI Global Peatlands extent map at 30-m (250-m effective);
2. PEATGRIDS at 1-km / Global Peatlands Map 2.0 produced by the Global Peatlands Initiative;
3. Europe Peatland Map 2025 produced by the Greifswald Mire Centre;
4. Peatland Extent and Condition for the Contiguous United States based on Lilleskov et al. (2025);
5. Canada national peatland map based on Webster et al. (2018);
6. Wetlands extent based on the ESA CCA time-series of land cover maps;

The average between the three sources is an extent map with value 0–100%. The refence period is 2000–2020, although probably most of data is based on pre 2010. For more details about the source data please refer to the cited references below.

Bare rock and bare sand estimates are based on the following two sources of data:

1. Copernicus GLC land cover at 100-m for 2015 and 2019;
2. Local Climate zones map at 100-m for 2018;

Two classes are considered: (1) probability of occurrence of bare rock (bare.rock_glc.gfz_p), (2) probability of occurrence of bare sand i.e. shifting sand (bare.soil.sand_glc.gfz_p). We recommend using only the 1-km data for spatial modeling.

The time-series of bare areas (bare.areas_esa.cci_p) are based on the ESA CCI Land Cover time-series (2000–2022) 300-m resolution data; also available at 1-km resolution based on "average" resampling.