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The study’s lead author, Chad Thackeray, an assistant researcher at UCLA, said one reason predictions about sea ice loss diverge so much is that they differ in how they consider a process called sea ice albedo feedback.

The process occurs when a patch of sea ice completely melts, uncovering a seawater surface that is darker and absorbs more sunlight than ice would have.

That change in the surface’s reflectivity of sunlight, or albedo, causes greater local warming, which in turn leads to further ice melt, the researchers said.

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hed in the journal Nature Climate Change. Among the current generation of models, some show ice-free Septembers as early as 2026, while others suggest the phenomenon will begin as late as 2132. <span>The study’s lead author, Chad Thackeray, an assistant researcher at UCLA, said one reason predictions about sea ice loss diverge so much is that they differ in how they consider a process called sea ice albedo feedback. The process occurs when a patch of sea ice completely melts, uncovering a seawater surface that is darker and absorbs more sunlight than ice would have. That change in the surface’s reflectivity of sunlight, or albedo, causes greater local warming, which in turn leads to further ice melt, the researchers said. The cycle exacerbates warming — one reason the Arctic is heating up twice as fast as the rest of the globe, they said. Thackeray and co-author Alex Hall, a UCLA professor, noted that se


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