  The warmer temperatures of global climate change strengthen the water cycle,
evaporation and precipitation increase. But the extremes of heavy rain, floods,
dry periods and droughts will also increase. How does this fit together? Simple
physical considerations show which factors mainly regulate the strength of the
water cycle in the Earth system, and how this determines water availability on
land. This can be used to interpret the observed changes in the water balance
in Germany and explain the increasing dryness in Germany.
