The disappearance of Mt. Shasta's snowpack not only has turned its summit brown but also has hastened the melting of glaciers, unleashing torrents of mud and rocks.
At Shasta, the effects were all too clear in the run-up to Labor Day weekend.The air was thick with smoke and ash from surrounding wildfires. Grasslands had withered to bare earth. Thousands of oak trees had jettisoned their leaves to conserve water. At Lake Shasta, one of the largest and most scenic reservoirs in the U.S., water levels had plunged to their lowest in 44 years, exposing a bathtub-style ring of bare dirt and rocks more than 100 feet wide.
“The glaciers are melting very quickly this year,” he adds, grimly. “Our hearts are with our neighbors who are currently affected by mudflows and wildfires.”Calvert described the hydrologic dynamics re-contouring Shasta as “cryptic and complex.” A recent U.S. Geological Survey inventory suggests the total glacier and perennial snowfall area in the American West may have decreased as much as 39% since the mid-20th century.
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