Forget That Big Iceberg–A Smaller One in the Arctic Is More Troubling

Forget That Big Iceberg–A Smaller One in the Arctic Is More Troubling

SOURCE: Scientific American DATE: July 31, 2017 SNIP: The world saw headlines about one of the largest icebergs ever calved a few weeks ago. But a smaller one on the other end of the globe might have bigger consequences. The chunk of ice, which broke free in the Arctic last week, is more worrisome to climate scientists who are watching one of Earth’s largest glaciers shed pieces in a way that stands to raise sea levels. Movement of the Petermann Glacier has sped up in recent years, dumping land-based ice into the ocean at a faster rate and drawing more ice down from the center of Greenland, said Laurence Dyke, a researcher at the Geological Survey of Denmark and Greenland. Meanwhile, the ice shelf that braces it and slows the rate of flow is disintegrating as climate change transforms the region. “You could call it the canary in the coal mine. If that big glacier there is changing quickly, and it is, it’s a worrying sign for what’s happening in the rest of Greenland,” he...
A major glacier in Greenland might be breaking apart

A major glacier in Greenland might be breaking apart

SOURCE: Grist and Icy Seas DATE: July 26, 2017 SNIP: “I am disturbed by new ocean data from Greenland every morning before breakfast these days.” — Andreas Muenchow A major glacier in Greenland might be breaking apart. That’s the buzz this week in the polar science community after a big new iceberg emerged at Petermann Glacier in far northwest Greenland. Scientists first spotted an extensive network of cracks in Petermann earlier this year. The worry is that those cracks may widen during the next few weeks, the warmest part of the short Greenland summer. — Eric...