In Glacier National Park, some effects of global climate change are strikingly clear. Glacier recession is underway, and many glaciers have already disappeared. The retreat of these small alpine glaciers reflects recent changes in climate as glaciers respond to warming temperature and altered precipitation. It has been estimated that there were approximately 150 glaciers present in 1850, and most glaciers were still present in 1910 when the park was established.
In 2010, there were only 25 glaciers larger than 25 acres remaining in the park. If computer-based climate predictions are true, the park’s glaciers could disappear in several decades.