Climate Change

Climate change is the shift

Climate change is the shift in climate prevailing over a given area over a long period of time. It occurs because the atmosphere is always changing an

Past climate changes are shown by

Past climate changes are shown by geological records, advances and retreats of glaciers, sediments in glacial lakes, tree rings, and historical record

The Younger Dryas was a cold

The Younger Dryas was a cold climatic reversal about 10,200 years ago. It affected Scandinavia and especially Scotland, and then climate returned to a

The Climatic Optimum was a warm

The Climatic Optimum was a warm period that peaked about 5,500 years ago. Mean mid-latitude temperature was about 2.5°C above present.

The Little Climate Optimum lasted from

The Little Climate Optimum lasted from about 950 to 1250 A.D. Greenland was settled by Vikings because temperatures rose and living conditions improve