A variety of gridded global climate datasets is provided covering
different periods within 1951-2000 and based on different data sources
(Climatic Research Unit, CRU; Global Precipitation Climatology Center, GPCC). 
 
The datasets are provided as tables of comma separated values (on a
common grid with 0.5°x0.5° resolution) as well as resampled georeferenced IDA
images and GeoTIFF files (5’x5’ resolution). 
 
Basic datasets of temperature, precipitation, aridity index, and
continentality index
Koeppen-Climatology/CommonData/CommonData.htm
 
 
Koeppen climate classification maps
Koeppen-Climatology/Koeppen_Climatology.htm
 
 
Climatic net primary production