Scientists have discovered a new way to track the melting of glaciers in Antarctica by using the changing shapes of bumps on the ice surface. A recent study published in the journal Nature has revealed that more than a third of these “pinning points” have reduced in size since 2000.
The research focused on ice shelves that cover around 75% of Antarctica’s coastline and are essential in slowing the movement of ice off the continent. By analyzing images from the American Landsat spacecraft dating back to 1973, researchers were able to track the thinning of ice shelves over several decades.
This innovative approach provides a longer historical perspective on ice melting compared to traditional satellite measurements using altimeters. The study showed that certain glaciers, such as Pine Island and Thwaites in West Antarctica, began thinning as early as the 1970s, while other areas didn’t start experiencing significant melting until the 1990s.
The findings shed light on the acceleration of ice loss in Antarctica and the potential impacts on global sea-level rise. Experts in the field of oceanography have praised the research for its groundbreaking approach to studying ice shelves and their role in supporting the stability of the ice sheet.
This research highlights the urgency of addressing climate change and its impact on the Antarctic ice sheet. The study serves as a reminder of the importance of monitoring and understanding the changes occurring in Antarctica to better prepare for the future.
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