Lecture 27-new

Lecture 27-new - Lecture27:TransitionfromGlacial...

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Lecture 27: Transition from Glacial to Interglacial (Holocene) Conditions The end of the last glacial period was the largest climate change with which humans have ever been associated. Many aspects of that transition are still beyond our complete explanation.
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The Simple View of the Transition The simple view is that climate changed significantly about 12,000 years ago. It went from globally cold to globally warm conditions in just 2- 4,000 years. Reality is never that simple.
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of the transition It appears that climate started warming up about 18-19,000 years ago, but only in the Southern Hemisphere around Antarctica. It returned to colder conditions about 14,000 years ago and then ‘quickly’ warmed to almost present-day conditions about 12,000 years ago. Conditions in the Northern Hemisphere did not start warming until about 15,000 years ago and went through ther Younger Dryas cold interval while Antarctica was much warmer. The important point is that
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This note was uploaded on 05/08/2009 for the course GEOL 150Lxg taught by Professor Stott during the Spring '07 term at USC.

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Lecture 27-new - Lecture27:TransitionfromGlacial...

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