Frank, K. Longo and Maria A. Silva-Dias Science Published in Get Full Access. Andreae, Luiz A. Martin, Ahmed Abdelmonem and Armin Afchine. Martin, Baerbel Sinha, Q. Chen, Sachin S.
Gunthe, Alex J. Thus, the clouds had a cooling effect. Koren and Altaratz hypothesized that the last time the skies were this clean of aerosols—other than in the Horse Latitudes, that is—was before the Industrial Revolution. The skies then must have been much less cloudy than today, Koren said. An implication of this theory is that as these cumuls clouds became more widespread at the beginning of the Industrial Revolution could have cooled the Earth.
Including these clouds in climate models could alter results significantly. But there's no way to know for sure. No one maintained records of aerosol levels in preindustrial times, and for now, Koran's suggestion is mere speculation. Muhlbauer said this was an "interesting" scenario but cautioned that the findings are extremely preliminary. Adding cumulus clouds into climate models is a "long way off," he said.
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