Thwaites glacier approaches irreversible collapse

An analysis of cracks in Antarctica's Thwaites Glacier over the past 20 years indicates it is nearing a total collapse. Known as the Doomsday Glacier, this rapidly changing ice mass poses uncertainties for global sea level rise predictions.

The Thwaites Glacier in Antarctica, often called the Doomsday Glacier, stands out as one of the planet's most rapidly evolving glaciers. A recent analysis examines the expansion of cracks within it over the last two decades, pointing to the possibility of an irreversible collapse in the near future.

This glacier's behavior remains a significant puzzle in forecasting how much sea levels might rise due to climate change. Scientists highlight its role in broader environmental shifts, including impacts on geology and earth science in polar regions.

The findings underscore the urgency of monitoring such ice formations, as their instability could accelerate global changes. While the exact timeline remains unclear, the observed crack growth suggests the glacier is getting closer to a tipping point.

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Climate models predict that the rate of glacier loss will accelerate to 3000 per year by 2040, even if nations achieve their emission reduction targets. This could result in 79 percent of the world's glaciers vanishing by 2100 under current policies, threatening water supplies for billions and contributing to sea-level rise. Researchers emphasize the potential to save many glaciers by limiting warming to 2 degrees Celsius.

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A meltwater lake on Greenland's 79°N Glacier, formed in 1995, has undergone sudden drainages that are fracturing the ice in unusual triangular patterns. These events, accelerating in recent years, raise concerns about the glacier's long-term stability amid warming temperatures. Scientists are studying whether it can recover from these disturbances.

Global greenhouse gas emissions reached a new high in 2024, signaling the planet's approach to an environmental tipping point. Current coral bleaching events serve as a severe climate warning, amid ongoing rises in emissions despite scientific calls for reductions.

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