Melting Point: Rapid Retreat at Petermann Glacier — Decades of retreat are vis |
. Rifting and periodic iceberg calving are normal parts of an outlet glacier’s life cycle, even in northwest Greenland. Still, these two events reduced the ice tongue by one-third.
In 2017, a rift formed near a stream channel running lengthwise along the glacier’s surface. Since then, thehas converged with an older rift. The merged rifts are visible in this detailed image of the floating ice tongue, acquired on May 14, 2023, with the Operational Land Imager on Landsat 8. It remains to be seen if the rift will eventually grow across the width of the glacier and release another large iceberg.
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