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Abstract

Land-use activities have influenced the Earth’s climate system by significantly altering biogeochemical and biogeophysical properties at local to planetary scales. Yet the precise magnitude and character of land-use effects on climate remains uncertain, and this uncertainty in turn limits the accuracy of future projections. To address this issue, we have developed a new set of global gridded land-use forcing datasets to link historical land-use data and future projections in a standard format required by climate models. For CMIP6, land-use has become a required forcing and use of the land-use harmonization dataset is designated as an entry card for participating in CMIP6 experiments. The second generation land-use harmonization (LUH2) product expands on the land-use forcing dataset generated for CMIP5 and includes new land-use states (and all transitions between them), updated inputs, and new management layers. 

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