The finding could help explain a phenomenon that has mystified climate scientists for more than 80 years, in which clouds are measured to be absorbing more sunlight than conventional physics holds possible: the additional evaporation could account for the discrepancy. This realization could alter calculations of how climate change affects cloud cover and precipitation. The photomolecular effect could also be harnessed for industrial processes such as desalinating water or drying materials.
“I think this has a lot of applications,” says engineering professor Gang Chen, who wrote a paper on the work with postdocs Guangxin Lv and Yaodong Tu and graduate student James Zhang, SM ’21. Noting that drying consumes 20% of all industrial energy usage, he says the team has already been approached by companies looking to use the effect for evaporating syrup and drying paper in a paper mill.
“We’re exploring all these different directions,” he adds. “And of course, it also affects the basic science, like the effects of clouds on climate, because clouds are the most uncertain aspect of climate models.”
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