(CNN)The sea ice off the coast of northern Greenland is normally some of the thickest in the entire Arctic, with ridges of ice piled as high as 70 feet in some places.
And despite the rapid retreat of sea ice across the region due to climate change, this harsh corner of the globe was expected to be the last to retain year-round sea ice cover.
But recent satellite imagery shows that some of the Arctic's oldest ice has been replaced by miles of open water for the first time on record, surprising scientists and ice monitors.
"This was the area that was seen as the last bastion, where we'd see these changes come last, but they've arrived," said Walt Meier, a senior research scientist with the National Snow and Ice Data Center.
Sea ice off of northern Greenland is much thicker than elsewhere in the Arctic because, according to Meier, as ice drifts across the Arctic from Siberia, it is compacted against Greenland's rugged coast.
But this year has shown that even the densest sea ice is not impervious to high temperatures.
In late February and early March, summerlike heat and winds out of the south resulted in a similar ice breakup in the region.
"We saw this occur first earlier this year ... which is really particularly unusual in the sense that it was still winter there, so it's generally very cold."
Keld Qvistgaard, a senior ice adviser with the Greenland Ice Service, says it's possible that the current breakup is connected to the one that appeared in February. But the current melt is far more extensive than what was spotted in late winter, and much larger than he's ever seen before.
Unlike Arctic sea ice the evidence just keeps piling up, but some are still stuck getting their science from blogs run by charlatans.
Are you a Gorebot? A Denier? Let's mix it up here and figure this issue out!
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