A recent state-of-knowledge review by top experts warns that abrupt climate shifts in Antarctica, driven by global warming, could lead to catastrophic consequences for generations. The study, published in Nature, reveals accelerating changes across the region, including rapid melting of sea ice, ocean currents, and ecosystems.
Experts say limiting CO2 emissions is crucial to reduce and prepare for these effects. Antarctic sea ice cover has retreated dramatically over the last decade, with 120 kilometers (75 miles) of coastline losing sea ice since 2014. This shift is happening three times faster than Arctic sea ice.
The study found that Antarctica could become ice-free in summer sooner than the Arctic, speeding up warming and potentially pushing marine species toward extinction. The world would need to heat up by 5°C compared to pre-industrial levels to melt the entire Antarctic ice sheet, which would lift global oceans by nearly 200 feet.
Experts warn of two potential risks: the collapse of the West Antarctic Ice Sheet, which could trigger a “point of no return” for global warming, and the slowdown of the Antarctic Overturning Circulation. To slow down these changes, it’s essential to stop adding more planet-warming gases into the atmosphere.
The review highlights the urgent need for action to mitigate the effects of climate change on Antarctica. By making greenhouse gas emission decisions over the coming decade or two, experts say we can lock in how much ice will be lost and how quickly it will be lost.
Source: https://www.cbsnews.com/news/abrupt-antarctic-climate-shifts-catastrophic-consequences-for-generations