Climate through the Ages - Long-Term Temperature Record, Cont.

• 14,000 y.a.,, glaciers started to retreat as temps rose
• 11,000 y.a., temps suddenly fell - referred to as Younger-Dryas
• The dramatic temperature drop might have been related to a change in the thermohaline circulation
• read more about it at Wikipedia
• Younger-Dryas lasted about 1000 years, then avg temps increased, glaciers retreated.
• 6,000-5,000 y.a., climate was about 1°C warmer than normal