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Glacier Melt Will Lead to Glacier-Less Summits in the Golden State for First Instance in Recorded History
Far in California’s Sierra Nevada, massive ice formations are disappearing and projected to dissolve completely by the beginning of the next century, resulting in summits without glaciers for the first time in human history, recent studies has discovered.
Ancient Origins of Sierra Nevada Ice Masses
The range's glaciers are older than earlier understood, tracing back tens of thousands of years, with a few as old as the last ice age, according to a report published recently.
“Our reconstructed glacial history indicates that a coming ice-free Sierra Nevada is unprecedented in human history since known peopling of the Americas ~20,000 years ago,” the study states.
Global Risk to Glaciers
Ice masses around the world are at risk amid the climate emergency. A study released in the month of May of this year found that nearly 40% of glaciers are doomed to thaw because of climate warming. If such heating rises by 2.7C, which the world is presently on course for, as many as seventy-five percent will vanish, leading to ocean level increase and mass displacement.
Throughout the Western United States, glaciers have diminished significantly since they were first documented in the late 19th century, according to the report.
Focus on Major Ice Bodies
The new research focuses on four Sierra Nevada glaciers – the Palisade, Lyell, Maclure and Conness glaciers – that are among the largest and likely oldest in the range. Their durability during global heating makes them “bellwethers” for studying glacier disappearance in the western region, the study states.
Study Techniques and Results
Researchers examined recently exposed bedrock around the ice formations and collected specimens to ascertain how long the region was blanketed by glacial ice. They determined that the ice masses have enveloped swaths of the range for much longer than earlier believed – since prior to people inhabited North America.
The state's glacial sheets reached their maximum positions as early as 30,000 years ago, the article’s authors wrote, and one of the ice bodies experts looked at is thought to have expanded seven thousand years ago, earlier than previously believed. The disappearance of ice formations, for the initial time in human history, demonstrates the profound effects of the climate crisis, one author of the investigation said.
Environmental and Symbolic Consequences
“We’ll be the first to see the glacier-less summits,” said the study's lead researcher, the principal investigator. “This has environmental ramifications for flora and fauna. And it’s a representational decline. Global warming is very abstract, but these ice masses are tangible. They’re symbolic elements of the Western U.S..”
Bradley Johnson
A passionate curator and advocate for Australian artisans, dedicated to showcasing unique handmade creations.
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