17.08.2020

# New Publications

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Xu, Yangyang; et al. (2020): Climate engineering to mitigate the projected 21st-century terrestrial drying of the Americas: a direct comparison of carbon capture and sulfur injection

Xu, Yangyang; Lin, Lei; Tilmes, Simone; Dagon, Katherine; Xia, Lili; Diao, Chenrui et al. (2020): Climate engineering to mitigate the projected 21st-century terrestrial drying of the Americas: a direct comparison of carbon capture and sulfur injection. In Earth Syst. Dynam. 11 (3), pp. 673–695. DOI: 10.5194/esd-11-673-2020.

"We show that sulfur injection, in contrast to previous notions of leading to excessive terrestrial drying (in terms of precipitation reduction) while offsetting the global mean greenhouse gas (GHG) warming, will instead mitigate the projected drying tendency under RCP8.5."

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14.07.2020

# New Publications

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Neuber, Frederike; Ott, Konrad (2020): The Buying Time Argument within the Solar Radiation Management Discourse

Neuber, Frederike; Ott, Konrad (2020): The Buying Time Argument within the Solar Radiation Management Discourse. In Applied Sciences 10 (13), p. 4637. DOI: 10.3390/app10134637.

"In this article, we will establish a version of the buying time argument (BTA) in favor of Sulphur Aerosol Injection (SAI) Climate Engineering (CE). The idea is not to promote the deployment of such scheme, but rather to present the strongest possible argument pro SAI in order to look at its presuppositions, implications, critical points and uncertainties."

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30.05.2020

# New Publications

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Visioni, Daniele; et al. 2020: “What Goes up Must Come down: Impacts of Deposition in a Sulfate Geoengineering Scenario.”

Visioni, Daniele, Eric Slessarev, Douglas MacMartin, Natalie M Mahowald, Christine L Goodale, and Lili Xia. 2020: “What Goes up Must Come down: Impacts of Deposition in a Sulfate Geoengineering Scenario.” Environmental Research Letters. https://doi.org/10.1088/1748-9326/ab94eb.

"‌We consider here an extreme sulfate geoengineering scenario necessary to maintain temperatures at 2020 levels while greenhouse gas emissions continue to grow unabated. We show that the amount of stratospheric sulfate needed could be globally balanced by the predicted decrease in tropospheric anthropogenic SO2 emissions, but the spatial distribution would move from industrialized regions to pristine areas. We show how these changes would affect ecosystems differently depending on present day observations of soil pH, which we use to infer the potential for acid-induced aluminum toxicity across the planet."

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30.04.2020

# New Publications

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Duan, Lei; et al. 2020: “A Model‐Based Investigation of Terrestrial Plant Carbon Uptake Response to Four Radiation Modification Approaches.”

Duan, Lei, Long Cao, Govindasamy Bala, and Ken Caldeira. 2020: “A Model‐Based Investigation of Terrestrial Plant Carbon Uptake Response to Four Radiation Modification Approaches.” Journal of Geophysical Research: Atmospheres 125 (9). https://doi.org/10.1029/2019jd031883.

"Using the National Center for Atmospheric Research Community Earth System Model, we performed simulations that represent four idealized radiation modification options: solar constant reduction, sulfate aerosol increase (SAI), marine cloud brightening, and cirrus cloud thinning (CCT)."

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01.04.2019

# New Publications

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Zhan, P.; et a. (2019): Impacts of sulfate geoengineering on rice yield in China

Zhan, P.; Zhu, W.; Zhang, T.; Cui, X.; Li, N. (2019): Impacts of sulfate geoengineering on rice yield in China. Results from a multi‐model ensemble. In: Earth's Future. DOI: 10.1029/2018EF001094.

"In this study, we simulated the impacts of sulfate geoengineering on rice yield in China both with sufficient irrigation (irrigated) and without irrigation (rainfed). We used Geoengineering Model Intercomparison Project (GeoMIP) G4 climates from 6 climate models to force the ORYZA version 3 crop model to simulate rice yields under sulfate geoengineering scenario."

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17.03.2019

# Media

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IQS Directory: Everything You Need To Know About Geoengineering

"Now though, a majority are starting to accept that something in our environment is happening. Supporting this sentiment is the fact that a large number of scientists the world over agree that our world is rapidly changing – and not for the better. As more individuals subscribe to the scientific data points of a climate in peril, the debate is now turning to what we should do about it. In certain instances, those disagreements are far more intense than those concerning if there is a problem at all. One such climate remedy that continues to gain traction is equal parts radical and fantastical, brilliant and bonkers. That remedy is geoengineering."

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04.03.2019

# Media

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Nbcnews: Wallace Smith Broecker, the 'grandfather' of climate science, leaves a final warning for Earth

"It was time for humankind and the world’s scientific community to begin to seriously study more extreme solutions to the climate crisis, Broecker said. That included creating a massive solar shield in the Earth’s atmosphere, a tactic known variously as 'geoengineering,' 'the sulfur solution,' 'solar radiation management' and the 'Pinatubo Strategy.'"

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16.02.2019

# Media

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MIT Technology Review: We’re about to kill a massive, accidental experiment in halting global warming

"Studies have found that ships have a net cooling effect on the planet, despite belching out nearly a billion tons of carbon dioxide each year. That’s almost entirely because they also emit sulfur, which can scatter sunlight in the atmosphere and form or thicken clouds that reflect it away.  In effect, the shipping industry has been carrying out an unintentional experiment in climate engineering for more than a century."

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29.11.2018

# Media

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heise online: Geoengineering: Scientists want to test a way to cool the earth (German)

German article on CE.

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12.11.2018

# New Publications

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Madronich, S.; et al. (2018): Response of Surface Ultraviolet and Visible Radiation to Stratospheric SO2 Injections

Madronich, S.; Tilmes, S.; Kravitz, B.; MacMartin, D.; Richter, J. (2018): Response of Surface Ultraviolet and Visible Radiation to Stratospheric SO2 Injections. In: Atmosphere 9 (11), S. 432. DOI: 10.3390/atmos9110432.

"Climate modification by stratospheric SO2 injections, to form sulfate aerosols, may alter the spectral and angular distributions of the solar ultraviolet and visible radiation that reach the Earth’s surface, with potential consequences to environmental photobiology and photochemistry. We used modeling results from the CESM1(WACCM) stratospheric aerosol geoengineering large ensemble (GLENS) project, following the RCP8.5 emission scenario, and one geoengineering experiment with SO2 injections in the stratosphere, designed to keep surface temperatures at 2020 levels."

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