Giant whales move into Greenland waters as ice disappears
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- Sea ice has disappeared from East Greenland’s coastal waters, allowing giant baleen whales to access areas historically blocked by ice, with ship surveys recording no humpbacks before 2006 and 150 sightings by 2024.
- Humpback, fin, and minke whales visited the Greenland Sea in summer 2024 in estimated numbers of 4,000, 6,000, and 6,000 respectively, feeding in ice-free zones newly opened by climate change.
- Prof Mads Peter Heide-Jørgensen described the shift as a 'major ecological regime shift', driven by rising sea temperatures and increased food availability from fish moving northward.
- Satellite-tagged whales and aerial surveys from 2015 and 2024, combined with Inuit hunter testimony, confirmed the whales’ expanded presence and feeding behavior along the East Greenland coast.
- Baleen whales consumed at least 800,000 tonnes of fish and krill during the summer feeding season, indicating a significant new predator load in the Arctic marine food web.
- Narwhals and belugas are now at risk as they share or lose habitat to the incoming baleen whales, highlighting that while some species benefit from warming, others are losing critical habitat.
Why it matters: The influx of 16,000 large whales into East Greenland redistributes marine predation pressure, benefiting adaptable baleen species while threatening ice-dependent Arctic natives like narwhals—reshaping both ecosystems and local hunting practices in a region where whale harvests are culturally significant.
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