25.09.2019

# New Publications

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MacMartin, Douglas G.; et al. (2019): Technical characteristics of a solar geoengineering deployment and implications for governance

MacMartin, Douglas G.; Irvine, Peter J.; Kravitz, Ben; Horton, Joshua B. (2019): Technical characteristics of a solar geoengineering deployment and implications for governance. In Climate Policy 22, pp. 1–15. DOI: 10.1080/14693062.2019.1668347.

"We examine the science of solar geoengineering in order to clarify the technical dimensions of decisions about deployment – both strategic and operational – and how these might influence governance considerations, while consciously refraining from making specific recommendations. The focus here is on a hypothetical deployment rather than governance of the research itself. We first consider the complexity surrounding the design of a deployment scheme, in particular the complicated and difficult decision of what its objective(s) would be, given that different choices for how to deploy will lead to different climate outcomes. Next, we discuss the on-going decisions across multiple timescales, from the sub-annual to the multi-decadal."

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24.09.2019

# Media

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New York Times: How to Cool a Planet With Extraterrestrial Dust

"A study of fossil meteorites suggests that a distant asteroid collision once sent Earth into an ice age."

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09.09.2019

# Media

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CNBC: This Bill Gates-funded chemical cloud could help stop global warming

"Bill Gates is backing the first high-altitude experiment of one radical approach called solar geoengineering. It’s meant to mimic the effects of a giant volcanic eruption."

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06.09.2019

# New Publications

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Collomb, J.-D. (2019): US Conservative and Libertarian Experts and Solar Geoengineering: An Assessment

Collomb, Jean-Daniel (2019): US Conservative and Libertarian Experts and Solar Geoengineering: An Assessment. In: European journal of American studies (14-2). Online verfügbar unter http://journals.openedition.org/ejas/pdf/14717.

"The goal of this article is to review the various positions taken by free-market conservative and libertarian public policy experts regarding solar geoengineering. A quantitative analysis and a qualitative analysis of the online publications of ten major free-market think tanks are provided with a view to determining whether free-market conservative and libertarian experts are embracing solar geoengineering as a key solution to climate change."

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30.08.2019

# Media

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The Verge: As a last resort, Andrew Yang proposes space mirrors to save the planet

"Presidential hopeful Andrew Yang has delivered a climate plan that fleshes out his dreams for a geoengineered world. According to his proposal, which was released on August 26th, it’ll take 20 years, $4.87 trillion, and maybe even space mirrors to prevent a climate catastrophe."

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30.08.2019

# Media

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NCAR & UCAR News: New consortium brings together solar geoengineering modeling experts

"Many of the country’s top solar geoengineering researchers have banded together to form a modeling consortium aimed at identifying gaps in our current understanding, prioritizing research that can fill those gaps, and pooling resources."

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22.08.2019

# New Publications

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Visioni, D.; et al. (2019): Seasonal Injection Strategies for Stratospheric Aerosol Geoengineering

Visioni, D.; MacMartin, D.; Kravitz, B.; Tilmes, S.; Mills, M.; Richter, J.; Boudreau, M. (2019): Seasonal Injection Strategies for Stratospheric Aerosol Geoengineering. In: Geophys. Res. Lett. 124 (6), S. 7. DOI: 10.1029/2019GL083680.

"Simulations of stratospheric aerosol geoengineering have typically considered injections at a constant rate over the entire year. [...] We simulated single‐point injections of the same amount of SO2 in each of the four seasons and at five different latitudes (30°S, 15°S, equator, 15°N, and 30°N), 5 km above the tropopause. Our findings suggest that injecting only during one season reduces the amount of SO2 needed to achieve a certain aerosol optical depth, thus potentially reducing some of the side effects of geoengineering. We find, in particular, that injections at 15°N or 15°S in spring of the corresponding hemisphere results in the largest reductions in incoming solar radiation."

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22.08.2019

# Media

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Informationsdienst Wissenschaft: What are the future topics of applied research? (German)

German article on CE

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19.08.2019

# Media

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The Economist: Sunshady business—the politics of geoengineering (Podcast)

"If efforts to cut emissions fall short, might some nations resort to solar geoengineering—building a sunshade in the stratosphere—to buy more time?"

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14.08.2019

# Media

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Dailymail: Could dimming the sun save the Earth?

"The plan sounds like science fiction — but could be fact within a decade; every day more than 800 giant aircraft would lift millions of tonnes of chalk dust to a height of 12 miles above the Earth's surface and then sprinkle the lot high around the stratosphere. In theory, the airborne dust would create a gigantic sunshade, reflecting some of the Sun's rays and heat back into space, dimming those that get through and so protecting Earth from the worsening ravages of climate warming."

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