"The concept of stratospheric aerosol geoengineering involves adding a layer of aerosol particles to the upper atmosphere to decrease climate changes due to greenhouse gases like carbon dioxide."

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Hemes, Kyle S.; Verfaillie, Joseph; Baldocchi, Dennis D. (2020): Wildfire‐smoke aerosols lead to increased light use efficiency among agricultural and restored wetland land uses in California's Central Valley. In J. Geophys. Res. Biogeosci. DOI: 10.1029/2019JG005380.

"In this work, we leverage a meso‐network of eddy covariance measurement sites across a unique array of managed and restored C₃ and C₄ canopy types to understand how recent wildfire smoke affected ecosystem productivity during the summer of 2018, an especially smoky year in the agriculturally productive Central Valley."

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"Finding new solutions to problems caused by climate change is what David Keith, professor of applied physics at Harvard School of Engineering, works on every day. Keith, one of the featured speakers at the Nobel Conference at Gustavus Adolphus College on Sept. 25, 2019, noted that three earlier problems involving smog, DDT pesticides, and stratospheric ozone, were problems that inspired quick action and effective results."

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Krishnamohan, K. S.; Bala, Govindasamy; Cao, Long; Duan, Lei; Caldeira, Ken (2020): The Climatic Effects of Hygroscopic Growth of Sulfate Aerosols in the Stratosphere. In Earth's Future. DOI: 10.1029/2019EF001326.

"We show that stratospheric sulfate aerosols, for a given mass of sulfates, cause more cooling when prescribed at the lower levels of the stratosphere because of hygroscopic growth. The larger relative humidity in the lower stratosphere causes an increase in the aerosol size through hygroscopic growth which leads to a larger scattering efficiency."

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