GGCMI Phase 3 crop calendar

The new crop calendar for GGCMI Phase 3 is a composite product merging various observational data sources. It provides in each 0.5° land grid cell the planting day and maturity day for 18 different crops, separating rainfed and irrigated systems. Grid cells outside of currently cultivated areas are spatially extrapolated and original data gap-filled. This crop calendar version only provide static growing periods, i.e., the multi-year average estimates. We only specify a single growing season per crop and grid cell, and no crop rotations are considered. However, for wheat and rice we provide data for a second season with separate crop calendars for winter and spring wheat, and two separate main rice growing seasons. Additional details on gap-filling, spatial extrapolation, and data source selection are provided in the original publication: Jägermeyr et al. 2021, Climate impacts on global agriculture emerge earlier in new generation of climate and crop, Nature Food, 2, pp. 873–885, https://www.nature.com/articles/s43016-021-00400-y An annual crop calendar with yearly observed planting and harvest dates is in preparation and will be published separately.