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Varying Aerosols Impact Solar Radiation Levels Reaching Earth’s Surface
Written by AZoCleantechFeb 19 2021
Back in the late 1980s and 1990s, scientists from ETH Zurich had detected the initial signs that the amount of solar light reaching the surface of the Earth had been progressively declining since the 1950s.
Haze over Los Angeles: Aerosols dim the incoming sunlight. (Image Credit: Adobe Stock.
Such a phenomenon was called global dimming  but a reversal in this trend became apparent only in the late 1980s. At several locations, the atmosphere brightened once again and solar radiation on the Earth s surface also increased.
In previous studies, we showed that the amount of sunlight that reaches the Earth’s surface is not constant over many decades but instead varies substantially a phenomenon known as global dimming and brightening. ....

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