Researchers have rebuffed a wild idea to use tiny, hollow glass beads to halt sea ice loss, finding that a coating of microspheres would actually accelerate ice melt instead of slowing it.
in Arctic summers by 2050. But the new research puts forward a comprehensive set of calculations to show why tiny glass beads are not the answer.
Webster teamed up with University of Washington atmospheric scientist Stephen Warren to test the claims of the 2018 modeling study, which had concluded that a layer of 65 micrometer-wide glass spheres spread about five beads deep could increase the reflectivity and thickness of Arctic sea ice. Layers of microspheres can make new, thin ice more reflective, as the 2018 study showed. But the effect of the glass beads would be minimal because thin ice mostly occurs in autumn and winter when there is little sunlight, Webster and WarrenCome spring, most Arctic sea ice is blanketed in bright-white, deep snow, which is highly reflective, so adding glass beads would actually darken sea ice surfaces at this time of year, leading to greater warming and ice loss.
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