Land use driver

[ankurdesai]

Per @apourmok email - the new gridded global land use driver 850-2100 - we should set something up to host the files (10s of GB of netcdf, currently not thredds) and extract this driver time series for sites/regions and feed it to models that could use land use. It's what will be used in CMIP6.

We are pleased to announce that a second generation Land-Use Harmonization dataset (LUH2) was released in late April and can be downloaded from our website: http://luh.umd.edu/. This new dataset was prepared for the sixth phase of the Coupled Model Intercomparison Project (CMIP6) experiments, as a contribution of the Land-Use Model Intercomparison Project (LUMIP), to provide global gridded land-use forcing datasets that link historical land-use data and future projections in a standard format required by climate models.

This new generation of LUH builds upon past work from CMIP5, and includes updated inputs, higher spatial resolution, more detailed land-use transitions, and the addition of important agricultural management layers. LUH2 v1.0h (released now) is the historical land-use forcing dataset, and covers the period 850-2015. This product is the result of a series of prototypes released previously, uses the established data format, and will connect smoothly to gridded products for the future (to be released later this year). A DOI is planned for this dataset.

The major attributes of LUH2 v1.0h include: • Global domain • 850-2015 annual land-use states, transitions, and gridded management layers • 0.25 x 0.25 degree spatial resolution • 12 possible land-use states including separation of Primary and Secondary natural vegetation into Forest and Non-forest sub-types, Pasture into Managed Pasture and Rangeland, and Cropland into multiple crop functional types • More than 100 possible transitions per grid cell per year, including crop rotations • Agriculture management layers including irrigation, fertilizer, biofuel management, fraction of crop biomass harvested, and fraction of cropland flooded • Agriculture and urban land-use based on HYDE 3.2 • Wood harvest reconstruction based on FAO and other sources • Spatial pattern of wood harvesting constrained by Landsat data • Updated shifting cultivation estimates • Information on fate of wood harvest • Data provided in NetCDF format

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