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.
AI mapping reveals hidden stage of Arctic freeze with climate implications
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Featured HeadlinesWhy Tesla’s Autopilot crashes spurred the feds to investigate driver-assist technologies – and what that means for the future of self-driving cars
