Scientists have discovered a troubling increase in methane emissions in the Ross Sea, Antarctica, which could significantly impact global climate change. Unlike the Arctic, where methane leaks have been recorded for some time, new findings reveal numerous methane seeps in the Antarctic, active since around 2011. Methane, a potent greenhouse gas, is about 80 times more effective at trapping heat than carbon dioxide over two decades, leading to concerns about a dangerous feedback loop as global temperatures rise.
In a study in Nature Communications, researchers used acoustic mapping and divers to identify previously undocumented methane seeps, indicating rapid environmental changes. Marine scientist Sarah Seabrook noted that the system is evolving quickly year by year. The origins of these leaks remain uncertain, but they may resemble patterns observed in the Arctic, linked to the release of gas trapped beneath ancient ice.
While the total methane output from Antarctica is not yet quantified, there is a pressing concern that these emissions are not accounted for in current climate models. The situation at the Antarctic ocean floor could represent accelerating and previously overlooked factors contributing to climate change.
