Mountain glaciers may hold less ice than previously thought – here’s what that means for 2 billion downstream water users and sea level rise
- Written by Mathieu Morlighem, Professor of Earth Sciences, Dartmouth College

Mountain glaciers are essential water sources for nearly a quarter of the global population. But figuring out just how much ice they hold – and how much water will be available as glaciers shrink in a warming world – has been notoriously difficult.
In...