A major glacier in northwest Greenland is interacting with the ocean tides, scientists reported Monday, resulting in previously unaccounted-for melting and potentially faster sea level rise.
The group of glaciologists from the University of California, Irvine and NASA’s Jet Propulsion Laboratory published the study in the Proceedings of the National Academy of Sciences on Monday. Observations from the Petermann Glacier revealed that the glacier’s grounding line — the area where the ice sheet begins to extend out on top of the ocean — can shift significantly as tides come in and out each day.
The phenomenon could worsen in the coming years and decades as ocean temperatures climb. CNN recently reported that sea surface temperatures were at their highest on record this spring — a spike that has alarmed scientists who are concerned it could be part of a worrying new trend. The study raises more concerns for the already worrisome prospect of sea level rise, which threatens coastlines around the world.
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