Researchers from the University of Birmingham and two other UK schools provide long-suspected evidence that glaciers near volcanoes move along the surface approximately 50% quicker than the average glacier.

The researchers write in the journal Communications Earth & Environment that, “Specifically, proximity to volcanoes most likely means higher volcanic geothermal flux or heat, which in turn triggers enhanced subglacial melt, increased basal water pressures, sliding, and ice flow.” In other words, a thin layer of water between the glacier and the warm ground acts as a lubricant, allowing the glacier to move faster.

The authors of the paper believe that monitoring the velocity of glaciers would prove to be a useful tool to assess imminent volcanic hazards. Left unsaid in the paper is that increased movement of glaciers may point to a natural process that is not related to climate change.

Trivia: One percent of the planet’s 214,086 glaciers are found within 3 miles (5 km) of an active volcano.

Source: Proximity to Active Volcanoes Enhances Glacier Velocity by Mallalieu et al, CE&E 2024.  Graphic: Antarctic Glacier.