World Map of the Köppen-Geiger climate classification updated

The most frequently used climate classification map is that ofWladimir Köppen, presented in its latest version
1961 by Rudolf Geiger. A huge number of climate studies and subsequent publications adopted this or a
former release of the Köppen-Geiger map. While the climate classification concept has been widely applied
to a broad range of topics in climate and climate change research as well as in physical geography, hydrology,
agriculture, biology and educational aspects, a well-documented update of the world climate classification
map is still missing. 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, we
present here a new digital Köppen-Geiger world map on climate classification, valid for the second half of
the 20th century.