Human carbon release rate is unprecedented in the past 66 million years of Earth's history
Monday, March 21, 2016 - 11:20
in Earth & Climate
The earliest instrumental records of Earth's climate, as measured by thermometers and other tools, start in the 1850s. To look further back in time, scientists investigate air bubbles trapped in ice cores, which expands the window to less than a million years. But to study Earth's history over tens to hundreds of millions of years, researchers examine the chemical and biological signatures of deep sea sediment archives.