Summer Breakout In Northeast Greenland
“The likely cause of the rapid disintegration is probably a wind-driven effect when the sea ice was already warm and weak,” said Christopher Shuman, a University of Maryland, Baltimore County, glaciologist based at NASA’s Goddard Space Flight Center. “Think of it like a wet paper towel being pulled apart as the winds blew across the area.”
The first image shows the region on July 21, 2023. A pocket of persistent open water, or polynya, had formed within the fjord’s sea ice near the front of the glaciers. on Landsat 9 and the OLI on Landsat 8, respectively. Some of the warmth likely came from Randsøen Lake at the edge of the glacier junction, visible toward the left side of the image above. This persistent lake collects summer meltwater from the margins of both glaciers. Streams atop the glaciers then carry the dark, sediment-laden water into the fjord, where the water continues to absorb more heat. The polynya grew larger until the sea ice broke out on July 23.Aside from seasonally warm areas, the ocean water near Storstrømmen and L.
that the shallow shape of the seafloor prevents warm Atlantic water from accessing these glaciers and melting them from below—a common phenomenon elsewhere around Greenland.
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