Climate Change Shifts 400,000 Lakes and 38% of Arctic Sites as Corals Bleach White
Updated
Updated · NPR · Nov 8
Climate Change Shifts 400,000 Lakes and 38% of Arctic Sites as Corals Bleach White
3 articles · Updated · NPR · Nov 8
Summary
More than color is changing: warming-driven bleaching, soot, thaw and habitat shifts are turning corals white, darkening lakes, greening parts of the Arctic and altering animal coloration.
A 2020 Nature Communications study found 38% of sampled Arctic sites greening from 1985 to 2016, while a 2021 PNAS study reported green wavelengths in more than 400,000 boreal Arctic lakes fell 15% from 1984 to 2019.
Those shifts can intensify warming and ecological stress—dark soot speeds ice melt, darker lakes retain more heat and can boost methane production, and bleached corals become more vulnerable to disease and death.
Animals are also being pushed out of visual sync with their environments: snowshoe hares stand out against reduced snow, male dragonflies are losing wing color in warmer climates, and hotter parts of Costa Rica have seen more orange-red orchid bees.
Researchers say the color changes are visible markers of broader climate disruption, with risks ranging from reef collapse and less diverse fish communities to altered Arctic food resources and fewer blue lakes as summers warm.