US EditionNASA satellites spot brand-new island in Alaska formed by melting glacier
Prow Knob, a 2-square-mile landmass, became an island after Alsek Glacier retreated over 3 miles since 1984, doubling Alsek Lake's size, NASA confirmed.
- Glaciers in southeastern Alaska are melting rapidly, causing increased water in proglacial lakes.
- The Alsek Glacier's retreat has created a new 2-square-mile island, completely surrounded by Alsek Lake.
- NASA reported that the Alsek Glacier officially separated from Prow Knob this summer, five years later than predicted.
- Mauri Pelto, a glaciologist, stated that the glacier's retreat may cause ecological and sociocultural consequences in the region.
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The Alsek glacier in the southeast of Alaska melts at a high speed – and creates islands where land masses used to be. Nevertheless, the fact that the water level does not rise off the shore of the state is due to a little-known phenomenon.
The retreat of a glacier led a piece of land to be completely surrounded by a lake
Satellite images show a new island appearing in Alaska
There are different ways that islands can form. Some take several million years, such as the magmatic hotspots where magma plumes from deep within the planet reach the surface and form something like the Hawaiian island chain, and others like the mud volcanoes off the coast of Azerbaijan. However, an island in the middle of Alsek Lake in Alaska took a slightly different route (Picture: NASA Earth Observatory / Michala Garrison) Prow Knob i…
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