17.12.2018

# New Publications

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Reynolds, J. (2018): The politics and governance of negative emissions technologies

Reynolds, J. (2018): The politics and governance of negative emissions technologies. In: Glob. Sustain. 1. DOI: 10.1017/sus.2018.13.

"It is well known that the Paris Agreement aims to keep climate change – perhaps the greatest current challenge to global sustainability – to within 2 °C of warming, and to strive for 1.5 °C. Many people point toward the scenarios used by the Intergovernmental Panel on Climate Change (IPCC) and conclude that this is feasible if only our leaders had the political will to do what’s necessary. However, it is less widely known that these scenarios assume the use of technologies to remove carbon dioxide from the atmosphere at very large scales."

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17.12.2018

# New Publications

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Lu, L.; et al. (2018): Wastewater treatment for carbon capture and utilization

Lu, L.; Guest, J.; Peters, C.; Zhu, X.; Rau, G.; Ren, Z. (2018): Wastewater treatment for carbon capture and utilization. In: Nature Sustainability 1 (12), S. 750–758. DOI: 10.1038/s41893-018-0187-9.

"This Review summarizes alternative wastewater treatment pathways capable of simultaneous CO2 capture and utilization, and demonstrates the environmental and economic benefits of microbial electrochemical and phototrophic processes. Preliminary estimates demonstrate that re-envisioning wastewater treatment may entirely offset the industry’s greenhouse gas footprint and make it a globally significant contributor of negative carbon emissions."

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17.12.2018

# New Publications

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Yuan, N.; et al. (2018): Extreme climatic events down-regulate the grassland biomass response to elevated carbon dioxide

Yuan, N.; Moser, G.; Mueller, C.; Obermeier, W.; Bendix, J.; Luterbacher, J. (2018): Extreme climatic events down-regulate the grassland biomass response to elevated carbon dioxide. In: Scientific reports 8 (1), S. 17758. DOI: 10.1038/s41598-018-36157-x.

"Terrestrial ecosystems are considered as carbon sinks that may mitigate the impacts of increased atmospheric CO2 concentration ([CO2]). However, it is not clear what their carbon sink capacity will be under extreme climatic conditions. In this study, we used long-term (1998–2013) data from a C3 grassland Free Air CO2 Enrichment (FACE) experiment in Germany to study the combined effects of elevated [CO2] and extreme climatic events (ECEs) on aboveground biomass production."

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17.12.2018

# New Publications

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Bonetti, F.; et al. (2018): Multiple input control strategies for robust and adaptive climate engineering in a low-order 3-box model

Bonetti, F.; McInnes, C. (2018): Multiple input control strategies for robust and adaptive climate engineering in a low-order 3-box model. In: Proceedings. Mathematical, physical, and engineering sciences 474 (2217), S. 20180447. DOI: 10.1098/rspa.2018.0447.

"A low-order 3-box energy balance model for the climate system is employed with a multivariable control scheme for the evaluation of new robust and adaptive climate engineering strategies using solar radiation management. The climate engineering measures are deployed in three boxes thus representing northern, southern and central bands. It is shown that, through heat transport between the boxes, it is possible to effect a degree of latitudinal control through the reduction of insolation."

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17.12.2018

# New Publications

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Possner, A.; et al. (2018): The efficacy of aerosol–cloud radiative perturbations from near-surface emissions in deep open-cell stratocumuli

Possner, A.; Wang, H.; Wood, R.; Caldeira, K.; Ackerman, T. (2018): The efficacy of aerosol–cloud radiative perturbations from near-surface emissions in deep open-cell stratocumuli. In: Atmos. Chem. Phys 18 (23), S. 17475–17488. DOI: 10.5194/acp-18-17475-2018.

"We show that a spatially coherent cloud perturbation is not evident along the emission line. Yet our model simulates an increase in domain-mean all-sky albedo of 0.05, corresponding to a diurnally averaged cloud radiative effect of 20 W m−2, given the annual mean solar insolation at the VOCALS-REx site. Therefore, marked changes in cloud radiative properties in precipitating deep open cells may be driven by anthropogenic near-surface aerosol perturbations, such as those generated by ships."

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13.12.2018

# New Publications

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Reynolds, J. et al. (2018): Governance of Highly Decentralized Nonstate Actors: the Case of Solar Geoengineering. Discussion Paper

Reynolds, J.; Wagner, G. (2018): Governance of Highly Decentralized Nonstate Actors: the Case of Solar Geoengineering. Discussion Paper.

"While solar geoengineering has the potential to greatly reduce climate change, it has generally been conceived as centralized and state deployed. Potential highly decentralized deployment moves the activity from the already contested arena of state action to that of environmentally motivated nongovernmental organizations and individuals, which could disrupt international relations and pose novel challenges for technology and environmental policy. We explore its feasibility, political implications, and governance."

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13.12.2018

# New Publications

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The National Academies of Science, Engineering, Medicine (2018): A Research Review of Interventions to Increase the Persistence and Resilience of Coral Reefs

The National Academies of Science, Engineering, Medicine (2018): A Research Review of Interventions to Increase the Persistence and Resilience of Coral Reefs. Washington, D.C.: National Academies Press. DOI: 10.17226/25279.

"Coral reef declines have been recorded for all major tropical ocean basins since the 1980s, averaging approximately 30-50% reductions in reef cover globally. These losses are a result of numerous problems, including habitat destruction, pollution, overfishing, disease, and climate change. Greenhouse gas emissions and the associated increases in ocean temperature and carbon dioxide (CO2) concentrations have been implicated in increased reports of coral bleaching, disease outbreaks, and ocean acidification (OA)."

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11.12.2018

# New Publications

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Sikka, T. (2018): Activism and Neoliberalism. Two Sides of Geoengineering Discourse

Sikka, T. (2018): Activism and Neoliberalism. Two Sides of Geoengineering Discourse. In: Capitalism Nature Socialism 3 (1), S. 1–19. DOI: 10.1080/10455752.2018.1554690.

"The paper provides a comparative, critical discourse-driven analysis of activism for and against climate engineering. Arguments in support of this approach to climate remediation are quintessentially neoliberal and can be found in discourses that fetishize entrepreneurialism, support a market driven ideology, and amplify creative destruction."

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10.12.2018

# New Publications

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Mandal, S.; et al. (2019): Transforming Atmospheric CO2 into Alternative Fuels. A Metal-Free Approach under Ambient Conditions

Mandal, S.; Sau, S.; Bhattacharjee, R.; Hota, P.; Vardhanapu, P.; vijaykumar, g. et al. (2019): Transforming Atmospheric CO2 into Alternative Fuels. A Metal-Free Approach under Ambient Conditions. In: Chem. Sci. DOI: 10.1039/C8SC03581D.

"The capture of CO2 from air can even proceed in the solid state via the formation of a bicarbonate complex (aNHC-H, HCO3, B(OH)3), which was also structurally characterized. A detailed mechanism for this process is proposed based on tandem density functional theory calculations and experiments."

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07.12.2018

# New Publications

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Akademien der Wissenschaften Schweiz (2018): Reverse emissions or influence solar radiation: Is “geoengineering” worthwhile, feasible and if so, at what price?

Akademien der Wissenschaften Schweiz (2018): Reverse emissions or influence solar radiation: Is “geoengineering” worthwhile, feasible and if so, at what price? Swiss Academies Factsheets 13 (4). Doi: 10.5281/zenodo.1409025

"The aim of the Paris Agreement is to limit global warming to well below 2 degrees Celsius, if possible even 1.5 degrees Celsius. Various scenarios show that very great efforts are necessary to achieve these goals through emission reduction measures alone. This motivates the search for additional solutions. Technical interventions in the climatesystem, often referred to by collective terms such as “geoengineering” or “climate intervention”, are therefore discussed."

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