From a long term perspective, South America´s different landscapes, climate- and vegetation zones are no stable features. In the Andes as well as in the large sediment basins environmental changes of the past are well documented in geomorphological
climate changes (such as ice ages) the rain forests shrank, savannahs expanded and deserts existed where dense vegetation dominates today. Or big lake sand long glaciers existed in today´s desert like central Andean valleys. Apart from temperature changes
Ice cores from Greenland and Antarctica are unique archives for past climate change. They permit the reconstruction of changes in temperature and concentrations of the major greenhouse gases. The longest climate history so far comes from the latest
of external stimulation mechanisms and internal feedback. Especially considering the present or future climate change paleo-climate research has become the focus of interests. The findings from climate archives can only be interpreted through results based
Changement climatique holocène et histoire du peuplement dans le Sahara oriental
the discontinuance of lacustrine deposits and the abandonment of prehistoric settlements at decreasing latitudes. The resulting southward movement of human settlement implied significant changes in pattern of behavior and land-use. - (IfL)
The earth´s climate underwent major changes long before the impact of humans has become relevant. Cretaceous and early Cenozoic climate was significantly warmer than today and polar areas were ice-free. Since 55 million years the earth cooled