New research extends Earth's temperature record back to 2 million years ago
 

New research extends Earth's temperature record back to 2 million years ago
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A new study extends global average surface temperature records back to 2 million years ago, further back in time than any previous climate research. The research suggests that global warming from human emissions of greenhouse gases will cause far more warming, up to 9 degrees Celsius, or 16.2 degrees Fahrenheit, during the next several millennia than previously expected.*

The study, published Monday in the scientific journal Nature, uses nearly five dozen ocean sediment cores to develop a record of Earth's global average surface temperature dating back to 2 million years.*

The study's author, Carolyn Snyder, a scholar at Stanford University and an official at the U.S. Environmental Protection Agency, used these sediment cores to create more than 20,000 climate reconstructions from specific points in the ocean.* Read more...

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