AI mapping reveals hidden stage of Arctic freeze with climate implications

PHYSorg
Aug 22, 2026, 1:00 pm388 ptsTop
As autumn gives way to winter across the Arctic, the ground doesn't immediately freeze solid. Instead, soils often linger near the freezing point for days or even weeks in a phase called the zero curtain. In a new NASA-led study, researchers produced high-resolution maps of the Arctic zero curtain.

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