20.09.2021

# Media

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The Times: Geoengineering by Gernot Wagner review — a new, quick way to avert a climate catastrophe?

"Solar geoengineering sounds like the dreams of a Bond villain, but this fast and cheap solution to global warming is a real option."

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20.09.2021

# New Publications

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Heyen, Daniel; Lehtomaa, Jere (2021): Solar Geoengineering Governance: A Dynamic Framework of Farsighted Coalition Formation

Heyen, Daniel; Lehtomaa, Jere (2021): Solar Geoengineering Governance: A Dynamic Framework of Farsighted Coalition Formation. In Oxford Open Climate Change. DOI: 10.1093/oxfclm/kgab010.

"Climate interventions with solar geoengineering could reduce climate damages if deployed in a globally coordinated regime. In the absence of such a regime, however, strategic incentives of single actors might result in detrimental outcomes. A well-known concern is that a "free-driver" (Weitzman 2015), the country with the strongest preference for cooling, might unilaterally set the global thermostat to its preferred level, thus imposing damages on others. Governance structures, i.e. more or less formal institutional arrangements between countries, could steer the decentralized geoengineering deployment towards the preferable global outcome. In this paper, we show that the coalition formation literature (an excellent summary is Ray & Vohra 2015) can make a valuable contribution to assessing the relative merit of different governance schemes."

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20.09.2021

# Media

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Video: CNBC: Why Bill Gates Is Funding Solar Geoengineering Research

"Fires burning across the Amazon rainforest have renewed the debate about solutions to climate change. 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. Thousands of planes would fly at high altitudes, spraying millions of tons of particles around the planet to create a massive chemical cloud that would cool the surface. [...] The technology is not far from being ready and it's affordable, but it could cause massive changes in regional weather patterns and eradicate blue sky. [...]Watch the video to learn how it would work and hear the debate around the ethics and efficacy of solar geoengineering."

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13.09.2021

# Media

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Podcast: Research ethics in geoengineering - Jude Galbraith

"How do ethics considerations affect the choices made by researchers as they propose and optimise geoengineering models?"

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13.09.2021

# New Publications

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Kravitz, Ben; Sikka, Tina (2021): Conducting more inclusive solar geoengineering research: A feminist science framework

Kravitz, Ben; Sikka, Tina (2021): Conducting more inclusive solar geoengineering research: A feminist science framework. In arXiv.org Physics and Society. Available online at https://arxiv.org/abs/2109.04217.

"Solar geoengineering, or deliberate climate modification, has been receiving increased attention in recent years. Given the far-reaching consequences of any potential solar geoengineering deployments, it is prudent to identify inherent biases, blind spots, and other potential issues at all stages of the research process. Here we articulate a feminist science-based framework to concretely describe how solar geoengineering researchers can be more inclusive of different perspectives, in the process illuminating potential implicit bias and enhancing the conclusions that can be gained from their studies. Importantly, this framework is an adoptable method of practice that can be refined, with the aim of conducting better research in solar geoengineering. As an illustration, we retrospectively apply this framework to a well-read solar geoengineering study, improving transparency by revealing its implicit values, conclusions made from its evidence base, and the methodologies that study pursues. We conclude with a set of recommendations for the geoengineering research community whereby more inclusive research can become a regular part of practice. Throughout this process, we illustrate how feminist science scholars can use this approach to study climate modeling."

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13.09.2021

# Media

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The Hill: A realistic response to the climate wake-up call

"Leaders across the world raised the alarm in response to the latest assessment of climate change by the Intergovernmental Panel on Climate Change (IPCC). Christiana Figueres, the former executive secretary of the UN Framework Convention on Climate Change said, 'This is a massive wake-up call that is sounding yet another alarm bell.' Al Gore warned 'There is no time left to waste,' and UN Secretary-General Antonio Guterres said, 'A code red for humanity.'"

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13.09.2021

# Media

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Politico: The perils of making rules for climate manipulation

"If humanity decides to tinker with Earth's thermostat, there are going to have to be some rules on how to control the dial. Many ideas for technologies to combat global warming by intervening in planetary systems — sometimes called geoengineering — are still in the research phase. But with climate change already taking hold, some could end up getting used."

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10.09.2021

# New Publications

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Bonou, Frederic; et al. (2021): Stratospheric Sulfate Aerosols impacts on West African monsoon precipitation using GeoMIP Models

Bonou, Frederic; Da-Allada, Casimir Yelognisse; Baloïtcha, Ezinvi; Alamou, Eric; Biao, Eliezer Iboukoun; Zandagba, Josué et al. (2021): Stratospheric Sulfate Aerosols impacts on West African monsoon precipitation using GeoMIP Models. In Earth and Space Science Open Archive. DOI: 10.1002/essoar.10507841.1.

"Stratospheric Aerosol Geoengineering (SAG) is proposed to offset global warming; the use of this approach can impact the hydrological cycle. We use simulations from Coupled Model Intercomparison Project (CMIP5) and Geoengineering Model Intercomparison Project (G3 simulation) to analyze the impacts of SAG on precipitation (P) and to determine its responsible causes in West Africa and Sahel region."

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10.09.2021

# Media

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IEEE Spectrum: Here's how we could brighten clouds to cool the earth

"'Ship tracks' over the ocean reveal a new strategy to fight climate change. As we confront the enormous challenge of climate change, we should take inspiration from even the most unlikely sources. Take, for example, the tens of thousands of fossil-fueled ships that chug across the ocean, spewing plumes of pollutants that contribute to acid rain, ozone depletion, respiratory ailments, and global warming.The particles produced by these ship emissions can also create brighter clouds, which in turn can produce a cooling effect via processes that occur naturally in our atmosphere. What if we could achieve this cooling effect without simultaneously releasing the greenhouse gases and toxic pollutants that ships emit? That's the question the Marine Cloud Brightening (MCB) Project intends to answer."

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08.09.2021

# New Publications

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Ricke, Katharine; Moreno-Cruz, Juan (2020): Geo-Wedges: A Portfolio Approach to Geoengineering the Climate

Ricke, Katharine; Moreno-Cruz, Juan (2020): Geo-Wedges: A Portfolio Approach to Geoengineering the Climate. In : Reference Module in Earth Systems and Environmental Sciences, vol. 531: Elsevier, p. 362.

"A host of methods to combat climate change through geoengineering could be available soon. These methods can reduce the concentrations of carbon in the atmosphere, limit the amount of incoming solar radiation or perturb the Earth's radiation balance in other ways. They may be implemented to slow down the rate of temperature change and limit the impacts of climate change. Any one technology could be too risky or costly to do the job by itself, but a coordinated intervention that employs different methods with diverse attributes could achieve climate impact reduction goals while limiting risk."

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