Where’s the sea ice? 3 reasons the Arctic freeze is unseasonably late and why it matters
- Written by Mark Serreze, Research Professor of Geography and Director, National Snow and Ice Data Center, University of Colorado Boulder

With the setting of the sun and the onset of polar darkness, the Arctic Ocean would normally be crusted with sea ice along the Siberian coast by now. But this year, the water is still open.
I’ve watched the region’s transformations since the 1980s as...
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