16.02.2019

# Media

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Belfer Center: Governance of the Deployment of Solar Geoengineering

"The Harvard Project on Climate Agreements has released a volume of 26 briefs that explores a range of topics related to how we might govern the deployment of solar geoengineering. “Solar geoengineering” (SG) refers to the deliberate alteration of the earth’s radiative balance in order to reduce the risks attributed to the accumulation of greenhouse gases in the atmosphere. The method most commonly discussed as technically plausible and potentially effective involves adding aerosols to the lower stratosphere, where they would reflect some (~1%) incoming sunlight back to space."

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11.02.2019

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Chatham House: Cool idea or hi-tech madness?

"As the threat from climate change looms ever larger, growing attention is being paid to proposals that sound as if they come straight from a sci-fi novel. One idea is to spray the stratosphere with particulates to reflect sunlight, thus reducing the temperature of planet Earth."

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11.02.2019

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Union of Concerned Scientists: UCS Position on Solar Geoengineering

"Deep cuts in emissions of heat-trapping gases and investments in adaptation to now unavoidable impacts must remain humanity’s first-line responses to climate change. Emission reductions and adaptation must be carried out at a greatly accelerated pace, and in a manner consistent with sustainable development and efforts to eradicate poverty."

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11.02.2019

# New Publications

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Dagon, K.; et al. (2019): Quantifying the effects of solar geoengineering on vegetation

Dagon, K.; Schrag, D. (2019): Quantifying the effects of solar geoengineering on vegetation. In: Climatic Change 13 (5), S. 776. DOI: 10.1007/s10584-019-02387-9.

"Solar geoengineering has potential to reduce the climate effects of greenhouse gas emissions through albedo modification, yet more research is needed to better understand how these techniques might impact terrestrial ecosystems. Here, we utilize the fully coupled version of the Community Earth System Model to run transient solar geoengineering simulations designed to stabilize radiative forcing starting mid-century, relative to the Representative Concentration Pathway 6 (RCP6) scenario."

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28.01.2019

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Grist: For geoengineers, a scientific existential crisis

"In mid-December, more than 28,000 people met in Washington, D.C., to discuss everything earth science-related at the American Geophysical Union Fall Meeting. But amid the dry data and scientific acronyms at a session on solar geoengineering, the science had a patina of existentialist dread that you might not see in a similar forum. There were questions of public disclosure, talk of slippery slopes, and an inescapable nervousness, as if maybe this subject was only barely sitting on the respectable side of science."

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27.01.2019

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Eos: Managing Uncertainties in Climate Engineering

"Climate engineering, or geoengineering, looks at ways to temporarily offset climate change by deliberately modifying the climate system. One of the most studied ideas, which is the focus of a new special issue in the Journal of Geophysical Research: Atmospheres, involves stratospheric sulfate aerosols, mimicking the cooling experienced after large volcanic eruptions [Kravitz et al., 2018]."

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21.01.2019

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Wired: One Scientist Hopes to Engineer the Climate With Antacid

"To help cure the planet’s ailments, Zhen Dai suggests antacid. In powdered form, calcium carbonate—often used to relieve upset stomachs—can reflect light; by peppering the sky with the shiny white particles, the Harvard researcher thinks it might be possible to block just enough sunlight to achieve some temperature control here on Earth."

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21.01.2019

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C2G2: Changing terms to match the IPCC

"Keeping track of evolving geoengineering terminology is a constant challenge. To that end, earlier this year we published our terminology guide, as well as explanatory blogs here and here, explaining why we chose to use certain terms – but also alerting readers to other terms that were in general use, along with their pros and cons."

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14.01.2019

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ntv: Scientists are testing the shadowing of the sun (German)

German article on CE

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14.01.2019

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Phys.org: Future of planet-cooling tech: Study creates roadmap for geoengineering research

"Simply reducing greenhouse gas emissions probably is not going to be sufficient for the planet to escape catastrophic damage from climate change, scientists say. Additional actions will be required, and one option is solar geoengineering, which could lower temperatures by methods such as reflecting sunlight away from the Earth through the deployment of aerosols in the stratosphere. However, the prospect of experimenting with the Earth's atmosphere has left some people skeptical of the process."

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