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2012 March 19. USGS News Release: Confidence in Climate Data: Using 3 Million-year-Old Records.

posted Mar 21, 2012, 10:59 AM by Fiona Potter   [ updated Mar 28, 2012, 2:22 PM ]
|USGS. An article relevant to GSS Climate Change chapter 7 and Life and Climate chapter 13. Excerpt: Scientists are looking at what climate conditions were like 3.3 to 3 million years ago, during a geologic period known as the Pliocene, and they are confident in the accuracy of their data. 
The Pliocene is the most recent period of sustained global warmth similar to what is projected for the 21st century. Climate during this time period offers one of the closest analogs to estimate future climate conditions….  Read the full article at http://www.usgs.gov/newsroom/article_pf.asp?ID=3147