The Blackfoot-Jackson basin contains the largest concentration and the largest glaciers in Montana’s Glacier National Park. According to a scientific study started in the 1990s, the park could lose even its largest glaciers by 2030.
This animation, using images from the Landsat 5 and 8 satellites, shows the glaciers’ retreat from 1984 to 2015.
The blue in the images above represents “permanent” snow and ice. The red in the southeast corner is a burn scar from the Thompson forest fire.
“These tiny remnants could last 10 to 15 years past that time if they are in sheltered places, but the park will no longer really have viable glaciers,” Fagre says.