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High spatial resolution (30 arc-second, ~800 m) Southwestern United States tree-ring reconstructions of net growing season growing degree days (May–Sept), net calendar-year precipitation (Jan–Dec), net water-year precipitation (previous Oct–Sept), and net growing-season precipitation (May–Sept).
High spatial resolution (30 arc-second, ~800 m) Southwestern United States tree-ring reconstructions of May-Sept growing degree days (GDD), net water-year precipitation (previous Oct–Sept), and the direct precipitation maize farming niche (>= 1800 growing Season F GDD & >= 300 mm water-year precipitation).
A recalibrated reconstruction of United States Summer PMDI over the last 2000 years. Updated half degree gridded Jun-Aug PMDI reconstructions from Cook et al. (2010). LBDA data in netCDF format are available from the NOAA study page.
Digital elevation data at 3 arc second (approx. 90m) horizontal resolution and less than 16m vertical resolution. The data are provided by the NASA Shuttle Radar Topographic Mission (SRTM) and the International Centre for Tropical Agriculture (CIAT), and are currently distributed free of charge by USGS and available for download through CGIAR at http://srtm.csi.cgiar.org/.