GIS data

Hijmans, R.J., S.E. Cameron, J.L. Parra, P.G. Jones and A. Jarvis, 2005. Very high resolution interpolated climate surfaces for global land areas. International Journal of Climatology 25: 1965-1978. Worldclim http://www.worldclim.org/bioclim.htm
Imhoff, Marc L., and Lahouari Bounoua. 2006. Exploring global patterns of net primary production carbon supply and demand using satellite observations and statistical data. Journal of Geophysical Research, vol. 111.
Imhoff, Marc L., Lahouari Bounoua, Taylor Ricketts, Colby Loucks, Robert Harriss, and William T. Lawrence. 2004. Global Patterns in Net Primary Productivity (NPP). Data distributed by the Socioeconomic Data and Applications Center (SEDAC).

[edit] use with SCCS

See Imputing the data Eff and Dow 2009