Global Rice Paddy Inventory (GRPI): a high-resolution inventory of methane emissions from rice agriculture based on Landsat satellite inundation data

GRPI is a 0.1^o × 0.1^o monthly resolution methane emission inventory for global rice agriculture in 2022. We use Landsat satellite data at 30-m resolution to map the global monthly distribution of rice paddy fractional areas on a 0.1^o× 0.1^o (~10 km ×10 km) grid by optimizing an algorithm for flooded vegetation and combining it with a 30-m global cropland database and rice-specific data. We validate this global rice paddy map with an independent US rice database and with seasonal flux measurements from the FLUXNET CH₄ network, estimating errors on rice area fraction of 31% on the 0.1^o× 0.1^o grid and 10% regionally.  You can find more detail in Chen, Z. et al, Global Rice Paddy Inventory (GRPI): a high-resolution inventory of methane emissions from rice agriculture based on Landsat satellite inundation data, Earth’s Future, in press, https://doi.org/10.31223/X5941Z, 2025.