Greenland's ice-free past raises concerns about sea level rise

New fossils found in Greenland suggest the continent was nearly ice-free in the past, sparking concerns about future ice loss and rising sea levels.

Sachi Kitajima Mulkey reports for Grist.

In short:

• Researchers from the University of Vermont discovered ancient plant and insect fossils in ice core samples from Greenland, indicating that the continent was largely ice-free within the last 1.1 million years.
• The findings suggest that Greenland's ice sheet, which contains enough water to raise sea levels by 23 feet, could melt more easily than previously thought, as current CO2 levels are at a historical high.
• Experts urge immediate action to reduce greenhouse gas emissions, warning that melting the Greenland ice sheet would be irreversible.

Key quote:

"Most likely, we’re creating a world where these ice sheets are going to melt.”

— Tyler Jones, glaciology researcher at the University of Colorado

Why this matters:

If Greenland's ice melts, global sea levels could rise significantly, threatening coastal communities worldwide. Understanding Greenland's past climate conditions helps scientists predict future changes and highlights the urgency of climate action to mitigate these impacts.