This summer, the Thwaites Glacier in Antarctica presented a striking image. It looked like it was weeping, with meltwater streaming down its massive face. Dr. Yixi Zheng, a climate scientist with the British Antarctic Survey, witnessed this firsthand while on the South Korean icebreaker Araon in the Amundsen Sea.
Standing on the ship, she described the glacier as towering high—about the height of a ten-story building. “It’s melting so quickly,” she said, likening the flow of water to a waterfall. This alarming sight can be a wake-up call for many. “When you see it, it triggers something inside. It’s like the ice is crying,” she remarked.
On this expedition, scientists noted a shimmering effect at the sea’s surface caused by the meltwater. Despite being deep underwater, the momentum of the water brought it to the surface, almost making the ice shelf appear to shake.
During their 12-day stay on the ice shelf, the team faced challenges. The ice was so compromised—with cracks and crevasses—that they had to use a helicopter instead of their usual fixed-wing plane. It allowed them to see the glacier’s deteriorating state up close.
Thirty kilometers from the open ocean, even the water beneath the ice measured a balmy 1.1 degrees Celsius—about three degrees above freezing. According to the Korea Polar Research Institute, the ice shelf is thinning at an alarming rate, losing between 40 and 140 meters each year.
The Antarctic summer is a crucial time for scientific research, and the results are concerning. The reality is that Antarctica is warming rapidly. Sea ice is dwindling, glaciers are shrinking, and the meltwater is impacting climate systems globally. Thwaites Glacier, often called the “doomsday glacier,” holds enough water to raise global sea levels by about 60 to 65 centimeters. The looming threat of its instability is a significant concern for scientists watching climate change unfold.
Dr. Edward Doddridge, a physical oceanographer from Tasmania, points to the grim evidence showing that Thwaites and its neighboring glaciers collectively hold potential for a five-meter rise in sea levels. “We may have already reached a point where they cannot be saved,” he cautioned. Even if we lower emissions, the glaciers will continue to melt, but at a slower pace, giving humanity more time to adapt.
So far, the rest of Antarctica hasn’t experienced extreme melting. However, there’s an estimated 52 meters of potential sea level rise in the East Antarctic ice shelf, raising alarms among researchers. The situation is dire, but the scientists remain dedicated. Their efforts include mapping the sea floor and studying core samples from glaciers like Cook Glacier to better understand past climate conditions.
As Thwaites and other glaciers melt, they not only contribute to rising sea levels but also disrupt global ocean currents. The flow of freshwater is less dense and doesn’t sink, which is essential for regulating ocean temperatures and nutrient distribution. This can create feedback loops that accelerate further melting.
The global climate system is interconnected. If the Atlantic Meridional Overturning Circulation (AMOC) slows or collapses, it could have dramatic effects on weather patterns worldwide. Matthew England, an expert in climate science, warns that disruptions could lead to significant agricultural and social challenges.
“Turning off AMOC would mean a La Niña-like world, causing extreme weather conditions,” he explains. An eventual AMOC collapse could also release carbon stored in oceans, adding to global warming. Studies from the Intergovernmental Panel on Climate Change (IPCC) indicate that AMOC may weaken significantly by the end of the century.
While changes in Antarctica can seem gradual, the urgent images of melting glaciers are reminders of the climate crisis’s reality. Scientists like Dr. Zheng feel the urgency every time they witness the shrinking ice. “It evokes a strange emotion,” she said. “You see it is melting fast, breaking up, and we need to do something.”
For more information on climate change and its effects, refer to the detailed reports available from the Intergovernmental Panel on Climate Change.
