06.04.2020

# Media

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AZoCleantech: Stratospheric Aerosol Geoengineering Could be Useful for Mitigating Climate Change

"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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06.04.2020

# Media

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Digital Journal: Geoengineering could reduce climate change risks

"New research, from the UK, indicates that injecting the correct quantity of sulphur dioxide into Earth's upper atmosphere thicken the layer of light reflecting aerosol particles. This could lower the effects of climate change."

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24.03.2020

# New Publications

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Robock, Alan. 2020: “Benefits and Risks of Stratospheric Solar Radiation Management for Climate Intervention (Geoengineering).”

Robock, Alan. 2020: “Benefits and Risks of Stratospheric Solar Radiation Management for Climate Intervention (Geoengineering).” Spring Bridge Issue on Engineering and Climate Change (50/1). 

‌"Even if it becomes possible, stratospheric geoengineering would come with benefits but also risks and concerns. Quantifying these benefits and risks requires more research."

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23.03.2020

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Azo cleantech: Stratospheric Aerosol Geoengineering Could be Useful for Mitigating Climate Change

"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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20.03.2020

# New Publications

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Irvine, Peter J, and David W Keith. 2020: “Halving Warming with Stratospheric Aerosol Geoengineering Moderates Policy-Relevant Climate Hazards.”

Irvine, Peter J, and David W Keith. 2020. “Halving Warming with Stratospheric Aerosol Geoengineering Moderates Policy-Relevant Climate Hazards.” Environmental Research Letters 15 (4): 044011. https://doi.org/10.1088/1748-9326/ab76de.

"In prior work it was found that halving warming with an idealized solar constant reduction would substantially reduce climate change overall, exacerbating change in a small fraction of places. Here, we test if this result holds for a more realistic representation of stratospheric aerosol geoengineering using the data from the geoengineering large ensemble (GLENS)."

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29.01.2020

# New Publications

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Bingaman, Donald C.; et al. (2020): A Stratospheric Aerosol Injection Lofter Aircraft Concept: Brimstone Angel

Bingaman, Donald C.; Rice, Christian V.; Smith, Wake; Vogel, Patrick (2020): A Stratospheric Aerosol Injection Lofter Aircraft Concept: Brimstone Angel. In : AIAA Scitech 2020 Forum. AIAA Scitech 2020 Forum. Orlando, FL. Reston, Virginia: American Institute of Aeronautics and Astronautics.

"A conceptual aircraft design is presented to facilitate Stratospheric Aerosol Injection (SAI) for the purpose of altering the Earth’s thermodynamic energy balance to offset a portion of anthropogenic global warming."

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27.01.2020

# Media

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RiverTowns: Scientists study new techniques to fight climate change

"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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27.01.2020

# Media

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Christian Science Monitor: Should we fiddle with Earth’s thermostat? This man might know how.

"Scientists are exploring a radical idea: dimming the sun. If it works, solar geoengineering could be a last-ditch option to buy time and avert ecological disaster. But it raises ethical, legal, and geopolitical questions."

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20.01.2020

# New Publications

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Krishnamohan, K. S.; et al. (2020): The Climatic Effects of Hygroscopic Growth of Sulfate Aerosols in the Stratosphere

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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14.01.2020

# New Publications

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Kravitz, Ben; MacMartin, Douglas G. (2020): Uncertainty and the basis for confidence in solar geoengineering research

Kravitz, Ben; MacMartin, Douglas G. (2020): Uncertainty and the basis for confidence in solar geoengineering research. In Nat Rev Earth Environ 1 (1), pp. 64–75. DOI: 10.1038/s43017-019-0004-7.

"Using a risk-register framework, we illustrate key uncertainties, such as sub-grid-scale mixing or effects of stratospheric heating, investigations of which should be prioritized to transition the field to a mission-driven research agenda."

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