TABLE 2.

Global datasets used for estimating N‐induced forest C sequestration and climate footprint of human N use

Variable	Data source and explanation	Spatial resolution	Reference
Fraction forest cover	Global Forest Monitoring Project. Forest area was calculated by multiplying forest cover fractions with total grid cell area.	20 km × 20 km	(Hansen et al., 2013)
Forest biome	WWF ecoregions aggregated to 4 classes (see Table S1) combined with FAO Global Ecological Zones (GEZ) (see Figure S1b)	— (vector)	(FAO/IIASA, 2012; Olson et al., 2001)
N2O from cropland soils	Multi‐model mean from six dynamic global vegetation models for the years 2007–2016	0.5° × 0.5°	(Tian et al., 2020; Tian, Yang, et al., 2019)
N2O due to deposition	Idem	Idem	Idem
Regional N2O emissions	Average emission estimates from several models and datasets for the years 2007–2016	10 world regions	(Tian et al., 2020)