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Deep in the state of Sierra Nevada, enormous ice formations are disappearing and projected to dissolve completely by the start of the coming hundred years, leaving summits without glaciers for the initial occasion in human history, new research has found.

Ancient Beginnings of Sierra Nevada Ice Masses

The mountain range’s glaciers are more ancient than earlier understood, tracing back many thousands of years, with a few as old as the most recent glacial period, according to an article published recently.

“Our reconstructed ice age record indicates that a coming glacier-free Sierra Nevada is without precedent in human history since known settlement of the Americas ~20,000 years ago,” the article declares.

Worldwide Threat to Ice Formations

Ice masses around the world are at risk amid the climate emergency. A research released in May of this year determined that nearly 40% of ice sheets are destined to melt because of global heating. If this warming increases by 2.7 degrees Celsius, which the planet is presently on track for, as up to seventy-five percent will vanish, causing ocean level increase and large-scale relocation.

Across the Western United States, ice formations have shrunk substantially since they were first documented in the 1800s, according to the report.

Focus on Key Ice Bodies

The recent study centers on several Sierra Nevada glaciers – the Conness, Maclure, Lyell and Palisade ice sheets – that are some of the biggest and likely most ancient in the range. Their durability during climate warming makes them “indicators” for studying ice loss in the west, the article notes.

Research Methods and Findings

Scientists examined newly uncovered base rock around the ice formations and collected specimens to ascertain how extensively the region was blanketed by glacial ice. They determined that the ice masses have enveloped large areas of the range for much longer than previously known – since prior to humans inhabited North America.

California’s glaciers attained their maximum positions as long ago as thirty thousand years ago, the study's researchers stated, and a particular of the glaciers experts looked at is thought to have grown seven thousand years ago, sooner than once thought. The disappearance of glaciers, for the first time in recorded history, demonstrates the dramatic impacts of the climate crisis, a researcher of the investigation said.

Ecological and Symbolic Impact

“We’ll be the first to witness the glacier-less summits,” said Andrew Jones, the principal investigator. “This has environmental ramifications for plants and animals. And it’s a symbolic loss. Climate change is highly intangible, but these ice masses are concrete. They’re iconic features of the American West.”