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Precipitation
Monthly mean precipitation (1986 to date) is provided by the Global Precipitation Climatology Centre at Deutscher Wetterdienst.
Temperature
Monthly mean 2m air temperature is taken from the ECMWF operational forecast (2002 to date). Historic data (1958-2001) are from the ERA40 reanalysis. Both data sets are provided by the British Atmospheric Data Centre, from their website at http://www.badc.rl.ac.uk
Soil Water Holding Capacity
Soil water holding capacity is taken from the NASA/GISS analysis of Bouman et al (1986) which is supplied by the United Nations Environmental Programme as dataset GNV25.
Base Map
ESRI World Basemap from http://www.esri.com/data/download/basemap
Rivers
Global stream network HYDRO1K from the US Geological Survey http://edc.usgs.gov
Population
Gridded Population of the World version 2. These data have been adjusted to match the UN national estimated population for each country in 1995. Available from http://sedac.ciesin.columbia.edu/plue/gpw/index.html?main.html&2
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