17.02.2020

# Media

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CBC: 'Tangled ball of issues': Why geoengineering our climate raises serious ethical, scientific challenges

"Some believe solar radiation management could stop the world from catastrophic warming"

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17.02.2020

# Media

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Blog: Red Cross Climate Centre: Geoengineering – there may be trouble ahead

"What would happen if someone had the option to spray ‘magic dust’ in the atmosphere to bring down the global temperature, but with potentially dangerous consequences?"

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13.02.2020

# New Publications

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Bódai, Tamás; et al. (2020): Can we use linear response theory to assess geoengineering strategies?

Bódai, Tamás; Lucarini, Valerio; Lunkeit, Frank (2020): Can we use linear response theory to assess geoengineering strategies? In Chaos 30 (2), p. 23124. DOI: 10.1063/1.5122255.

"First, our objective (O1) is to assess only the best possible geoengineering scenario by looking for a suitable modulation of solar forcing that can cancel out or otherwise modulate a climate change signal that would result from a rise in carbon dioxide concentration [CO22] alone. [...] Second, to be able to utilize LRT to quantify side-effects, the response with respect to uncontrolled observables, such as regional averages Ts⟨Ts⟩, must be approximately linear."

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10.02.2020

# Media

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Philippine Daily Inquirer: Global warming and volcanic activity

"The recent spate of volcanic eruptions around the world has people asking if this is connected to the warming of the Earth’s atmosphere. The eruption of Taal Volcano brings this issue closer to home."

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05.02.2020

# New Publications

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Gasparini, Blaž; et al. (2020): To what extent can cirrus cloud seeding counteract global warming?

Gasparini, Blaž; McGraw, Zachary; Storelvmo, Trude; Lohmann, Ulrike (2020): To what extent can cirrus cloud seeding counteract global warming? In Environ. Res. Lett. DOI: 10.1088/1748-9326/ab71a3.

"Previous studies that analyzed modifications of cirrus clouds by seeding of ice nucleating particles showed large uncertainties in both cloud and surface climate responses, ranging from no effect or even a small warming to a globally averaged cooling of about 2.5°C. We use two general circulation models that showed very different responses in previous studies, ECHAM6-HAM and CESM-CAM5, to determine which radiative and climatic responses to cirrus cloud seeding in a 1.5 x CO2 world are common and which are not."

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05.02.2020

# Media

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C2G Guest Post: A better understanding of non-Western views is needed for inclusive SRM governance

"Yet public perception research on SRM has been so far limited largely to the countries of Europe and North America—the so-called WEIRD (Western, Educated, Industrialized, Rich and Democratic) societies. To help fill this gap, we conducted an online survey of university students in six Asia-Pacific countries: Australia, China, India, Japan, the Philippines, and South Korea."

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30.01.2020

# Media

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SRMGI: First African Master's Thesis on SRM

"We send a warm congratulations to Jose Ricardo Kouakou, who is a student at the University of Felix Houphouet-Boigny and one of the Ivory Coast DECIMALS researchers. On 9 December he successfully defended his thesis on SRM, which explored how SRM might affect extreme temperatures in West Africa."

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30.01.2020

# Political Papers

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C2G Technical Brief: Considering climate-altering technologies in the IPCC AR6 (2nd Edition)

C2G Technical Brief: Considering climate-altering technologies in the IPCC AR6. 12 November 2019 - 2nd Edition

"The Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCCAR6), currently in preparation, will play a key role in the formation of future climate change policy. This includes the governance of potential climate-altering technologies, such as Carbon Dioxide Removal (CDR) and Solar Radiation Modification (SRM). "

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30.01.2020

# Political Papers

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C2G Policy Brief: Governing Solar Radiation Modification (2nd Edition)

C2G Policy Brief: Governing Solar Radiation Modification. 26 November 2019 - 2nd Edition.

"Current commitments made under the 2015 Paris Agreement on climate change are insufficient to keep global warming below 2°C, and according to the Intergovernmental Panel on Climate Change (IPCC), much greater ambition is necessary. In response, scientists and others are considering the viability of climate-altering technologies known as Solar Radiation Modification (SRM). These aim to reflect solar radiation (sunlight) back into space or allow more heat to escape Earth’s atmosphere in order to counter some of the effects of climate change by reducing the global temperature."

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30.01.2020

# Political Papers

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C2G: Evidence Brief (2020): Governing Solar Radiation Modification

C2G Evidence Brief (2020): Governing Solar Radiation Modification. 21 January 2020.

"This briefing summarises the latest evidence around Marine Cloud Brightening (MCB) and Stratospheric Aerosol Injection (SAI), two important types of Solar Radiation Modification climate-altering technologies. It describes the techniques, explores their technical readiness, current research, applicable governance frameworks, and other socio-political considerations. It provides an analysis of the types of geopolitical issues and concerns, including security, that the technologies may give rise to and how existing governance does or does not help address those. It also provides an overview of key existing governance instruments of relevance to their governance."

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