An international team of 21 scientists from ten countries has released a landmark study in Science showing that substantial global glacier loss is now unavoidable. Using eight glacier models to assess more than 200,000 glaciers outside Greenland and Antarctica, the researchers found that current climate policies would lead to catastrophic ice loss. If warming reaches 2.7°C — the trajectory set by today’s commitments — only 24% of present-day glacier mass will remain.
In contrast, limiting warming to 1.5°C, the target of the Paris Agreement, would preserve 54% of glacier mass. This means strong climate policies could save twice as much ice compared to the current path. The study underscores the critical importance of immediate and ambitious emissions reductions to slow the pace of glacier retreat.
“Glacier loss is unavoidable, but the scale of loss is not. Strong climate action can double the amount of ice preserved for future generations.”
Glaciers are vital for global water security, ecosystems, and sea level regulation. Their retreat threatens communities dependent on meltwater in regions such as the Himalayas, Andes, and Alps, while contributing to rising seas that endanger coastal populations worldwide. The study highlights that every fraction of a degree matters: even small differences in warming scenarios translate into massive differences in glacier survival.
The findings add urgency to international climate negotiations and reinforce the need for policies aligned with the Paris Agreement. Without stronger action, the world faces irreversible losses that will reshape landscapes, economies, and societies. With decisive action, however, humanity can still preserve a significant portion of Earth’s glaciers and the critical services they provide.
