The climate clues buried under Greenland's ice sheet
The Greenland Ice Sheet contributes more to sea level rise than any other ice mass. If it disappeared, it would raise global sea levels by 24 feet, devastating coastlines home to about half the world’s population. Computer simulations and modern observations alone can’t precisely predict how Greenland might melt.
Greenland’s bedrock holds clues. It was present the last time the ice sheet melted completely and contains chemical signatures of how that melt unfolded. It could help scientists predict how drastically Greenland might change in the face of today’s rising temperatures.
Related Knowledge Center: Climate science
What began as a theory in the 1890s — that industrial emissions of carbon dioxide could increase global temperatures — had progressed to a scientific fact a century later. Scientists across a range of disciplines are studying the impact of the still-growing concentration of carbon dioxide and other so-called “greenhouse gases” in the atmosphere as they call for industrial and governmental policies to slow, then halt, the warming of the planet.