23.11.2020

# New Publications

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Thoni, Terese; et al. (2020): Deployment of Negative Emissions Technologies at the National Level: A Need for Holistic Feasibility Assessments

Thoni, Terese; Beck, Silke; Borchers, Malgorzata; Förster, Johannes; Görl, Knut; Hahn, Alena et al. (2020): Deployment of Negative Emissions Technologies at the National Level: A Need for Holistic Feasibility Assessments. In Front. Clim. 2. DOI: 10.3389/fclim.2020.590305.

"We examine 17 Long-Term Low Greenhouse Gas Emission Development Strategies (LT-LEDS), and discuss them in the context of available NETs feasibility assessments. Our mapping shows that most countries include NETs in their long-term strategies, and that enhancement of natural sinks is the most dominating type of NET in these strategies."

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23.11.2020

# New Publications

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Lockley, Andrew (2020): State commissioning of Solar Radiation Management geoengineering

Lockley, Andrew (2020): State commissioning of Solar Radiation Management geoengineering. In Ethics, Policy & Environment. DOI: 10.1080/21550085.2020.1848176.

"Notwithstanding concerns about privatisation, we assume state commissioning of SRM - proposing and analysing plausible governance, by adapting extant proposals. We consider two regulatory functions: legal/corporate; and scientific/technical. We briefly discuss mandatory, emissions-linked SRM funding."

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19.11.2020

# New Publications

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Odoulami, Romaric C.; et al. (2020): Stratospheric Aerosol Geoengineering could lower future risk of ‘Day Zero’ level droughts in Cape Town

Odoulami, Romaric C.; New, Mark; Wolski, Piotr; Guillemet, Gregory; Pinto, Izidine; Lennard, Christopher et al. (2020): Stratospheric Aerosol Geoengineering could lower future risk of ‘Day Zero’ level droughts in Cape Town. In Environ. Res. Lett. 15 (12), p. 124007. DOI: 10.1088/1748-9326/abbf13.

"Here, we assess the potential for geoengineering using stratospheric aerosols injection (SAI) to offset the risk of 'Day Zero' level droughts in a high emission future climate using climate model simulations from the Stratospheric Aerosol Geoengineering Large Ensemble Project. Our findings suggest that keeping the global mean temperature at 2020 levels through SAI would offset the projected end century risk of 'Day Zero' level droughts by approximately 90%, keeping the risk of such droughts similar to today's level."

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18.11.2020

# New Publications

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Schneider, Tapio; et al. (2020): Solar geoengineering may not prevent strong warming from direct effects of CO2 on stratocumulus cloud cover

Schneider, Tapio; Kaul, Colleen M.; Pressel, Kyle G. (2020): Solar geoengineering may not prevent strong warming from direct effects of CO2 on stratocumulus cloud cover. In Proceedings of the National Academy of Sciences of the United States of America. DOI: 10.1073/pnas.2003730117.

"Solar geoengineering that manipulates the amount of sunlight Earth absorbs is increasingly discussed as an option to counter global warming. However, we demonstrate that solar geoengineering is not a fail-safe option to prevent global warming because it does not mitigate risks to the climate system that arise from direct effects of greenhouse gases on cloud cover"

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17.11.2020

# New Publications

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Delina, Laurence L. (2020): Potentials and critiques of building a Southeast Asian interdisciplinary knowledge community on critical geoengineering studies

Delina, Laurence L. (2020): Potentials and critiques of building a Southeast Asian interdisciplinary knowledge community on critical geoengineering studies. In Climatic Change, pp. 1–15. DOI: 10.1007/s10584-020-02921-0.

"This essay summarizes the deliberations of a workshop that sought to build an inter- and multi-disciplinary knowledge community on the critical study of geoengineering in Southeast Asia."

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17.11.2020

# New Publications

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Banerjee, Antara; et al. (2020): Robust winter warming over Eurasia under stratospheric sulfate geoengineering – the role of stratospheric dynamics

Banerjee, Antara; Butler, Amy H.; Polvani, Lorenzo M.; Robock, Alan; Simpson, Isla R.; Sun, Lantao (2020): Robust winter warming over Eurasia under stratospheric sulfate geoengineering – the role of stratospheric dynamics. In Atmos. Chem. Phys. Discuss. (in review). DOI: 10.5194/acp-2020-965.

"It has been suggested that increased stratospheric sulfate aerosol loadings following large, low latitude volcanic eruptions can lead to wintertime warming over Eurasia through dynamical stratosphere-troposphere coupling. We here investigate the proposed connection in the context of hypothetical future stratospheric sulfate geoengineering in the Geoengineering Large Ensemble simulations."

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16.11.2020

# New Publications

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Randers, Jorgen; Goluke, Ulrich (2020): An earth system model shows self-sustained melting of permafrost even if all man-made GHG emissions stop in 2020

Randers, Jorgen; Goluke, Ulrich (2020): An earth system model shows self-sustained melting of permafrost even if all man-made GHG emissions stop in 2020. In Sci Rep 10 (1), pp. 1–9. DOI: 10.1038/s41598-020-75481-z.

"In this paper we report that in the ESCIMO climate model the world is already past a point-of-no-return for global warming. In ESCIMO we observe self-sustained melting of the permafrost for hundreds of years, even if global society stops all emissions of man-made GHGs immediately. We encourage other model builders to explore our discovery in their (bigger) models, and report on their findings."

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13.11.2020

# New Publications

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Reynolds, Jesse L. (2020): Is solar geoengineering ungovernable? A critical assessment of governance challenges identified by the Intergovernmental Panel on Climate Change

Reynolds, Jesse L. (2020): Is solar geoengineering ungovernable? A critical assessment of governance challenges identified by the Intergovernmental Panel on Climate Change. In Wiley Interdisciplinary Reviews: Climate Change. DOI: 10.1002/wcc.690.

"I find seven such challenges identified in the IPCC reports: that SRM could lessen mitigation; that its termination would cause severe climatic impacts; that researching SRM would create a “slippery slope” to its inevitable and unwanted use; that decisions to use it could be contrary to democratic norms; that the public may not accept SRM; that it could be unethical; and that decisions to use SRM could be unilateral. After assessing the extent to which these challenges are supported by existing evidence, scholarly literature, and robust logic, I conclude that, for six of the seven, the IPCC's claims variously are speculative, fail to consider both advantages and disadvantages, implicitly make unreasonable negative assumptions, are contrary to existing evidence, and/or are meaninglessly vague."

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12.11.2020

# New Publications

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DeLisi, Charles; et al. (2020): The Role of Synthetic Biology in Atmospheric Greenhouse Gas Reduction: Prospects and Challenges

DeLisi, Charles; Patrinos, Aristides; MacCracken, Michael; Drell, Dan; Annas, George; Arkin, Adam et al. (2020): The Role of Synthetic Biology in Atmospheric Greenhouse Gas Reduction: Prospects and Challenges. In BioDesign Research 2020, pp. 1–8. DOI: 10.34133/2020/1016207.

"The long atmospheric residence time of CO2 creates an urgent need to add atmospheric carbon drawdown to CO2 regulatory strategies. Synthetic and systems biology (SSB), which enables manipulation of cellular phenotypes, offers a powerful approach to amplifying and adding new possibilities to current land management practices aimed at reducing atmospheric carbon."

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10.11.2020

# New Publications

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Hubert, Anna‐Maria (2020): A Code of Conduct for Responsible Geoengineering Research

Hubert, Anna‐Maria (2020): A Code of Conduct for Responsible Geoengineering Research. In Glob Policy. DOI: 10.1111/1758-5899.12845.

"This article explores the potential contribution of the development of a code of conduct to serve as a near‐term governance instrument to guide the responsible conduct of geoengineering research."

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