Supplement 1. Matlab m-code used to obtain values of mean annual temperature and mean annual precipitation at a point nearest to the study site from the New et al. (2000) 10' climatology when local data were not available.

File List GlobalClimate.m -- Matlab code Description This code returns the mean annual temperature (MAT) and mean annual precipitation (MAP) for any terrestrial lat × long coordinates using the data set described in New et al (2000). Input (at prompt): latitude and longitude (in decimal degrees with N and E > 0 and W and S <0) Output: mean annual precipitation MAP (mm y-1) and mean annual temperature MAT, (degrees C) References: New, Mark, David Lister, Mike Hulme, and Ian Makin. 2002. A high resolution data set of surface climate over global land areas. Climate Research 21:1–25. Required data files (should be renamed after downloading): Tglobal10min.mat: http://www.cru.uea.ac.uk/cru/data/tmc.htm/grid_10min_pre.dat.gz Pglobal10min.mat: http://www.cru.uea.ac.uk/cru/data/tmc.htm/grid_10min_tmp.dat.gz