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How nuclear weapons research revealed new climate threats

Lawrence Livermore Lab’s increasingly powerful climate models have sounded a stark warning for California.
By James Temple

After atmospheric scientist Ivana Cvijanovic began pushing a computerized climate simulation to its limits, she noticed a disturbing result: as Arctic sea ice nearly disappeared, massive high-pressure systems built up thousands of miles away, off the west coast of the United States. The atmospheric ridge blocked major storms bound for California, cutting off rainfall. Cvijanovic’s model shows that as the North Pole’s…

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