The most frequently used climate classification map is that of Wladimir Köppen, presented in its latest version in 1961 by Rudolf Geiger. This new digital Köppen-Geiger world map on climate classification for the second half of the 20th century, downloaded from the University of Veterinary Medicine Vienna (VUW), is based on recent data sets from the Climatic Research Unit (CRU) of the University of East Anglia and the Global Precipitation Climatology Centre (GPCC) at the German Weather Service.
Worldclim database (www.worldclim.org) includes maps at different resolutions of around twenty variables related to different climatic factors (temperature, precipitation, seasonality, etc.). If whole Earth extent is selected, users can choose between maps at spatial resolution (pixel side) of 600, 300 or 150 seconds. If selected extent is Europe or less, users can choose between maps at spatial resolution (pixel side) of 300, 150 or 30 seconds.
Past Estimates: Center for Climatic Research, Genesis Paleo Sensitivity Experiments. Experiment 126KDI: 126.000 years ago, mixed layer of Sea Surface Temperature, Dynamic Sea-Ice, 1120 years averaged. Monthly (12 maps per variable): http://ccr.meteor.wisc.edu/model/visualization/gen/gentable.php
The Intergovernmental Panel on Climate Change (IPCC) is the most important source of information about climate change. Among all of the models, scenarios and variables available at the IPCC Data Distribution Centre (http://www.ipcc-data.org), here you can download data on future estimates of Temperature and Precipitation from Model output described in the 2007 IPCC Fourth Assessment Report, multi-year means, models CSIRO:MK3 and UKMO:HADCM3, scenarios SRES A1B, A2 and B1.
Worldclim provides also climate change data for future conditions derived from the output of global climate models (www.worldclim.org/future.htm). The model CCM3 is run using a scenario of 2 x CO2 in the atmosphere (Govindasamy, B.; Duffy, P. B.; Coquard, J. 2003. High-resolution simulations of global climate, part 2: effects of increased greenhouse cases. Climate Dynamics 21: 391-404). Users can choose between the same variables and extent/resolution scales mentioned before.
Worlclim has a new web page on future conditions (http://www.worldclim.org/futdown.htm) with more up-to-date data downscaled from global climate model output, IPPC 3rd assessment (4th assessment coming soon).
Global Land Surface Evapotranspiration and Water Balance Data Sets include annual potential evapotranspiration, evapotranspiration and water balance. Data sets were developed by AHN Chung-Hyun and Ryutaro TATEISHI (Remote Sensing and Image Research Center, Chiba University) and downloaded from Global Resource Information Database - United Nations Environment Programme (UNEP/GRID).
GIS layers in the EDIT geoplatform are all in geodetic coordinates (longitude, latitude), datum WGS84.
Data can be downloaded in two different formats: Idrisi (vector or raster) and ESRI (vector shape or raster ASCII).