Arctic sea ice reaches historic seasonal low

Apparently we’re just about out of multi-year ice at the north pole:

The multiyear ice covering the Arctic Ocean has effectively vanished….

“I would argue that, from a practical perspective, we almost have a seasonally ice-free Arctic now, because multiyear sea ice is the barrier to the use and development of the Arctic,” said Barber [Canada’s Research Chair in Arctic System Science at the University of Manitoba].

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