22.06.2018

# New Publications

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Mayes, William Matthew; et al. (2018): Atmospheric CO2 sequestration in iron and steel slag: Consett, Co. Durham, UK.

Mayes, William Matthew; Riley, Alex L.; Gomes, Helena I.; Brabham, Peter; Hamlyn, Joanna; Pullin, Huw; Renforth, Phil (2018): Atmospheric CO2 sequestration in iron and steel slag. Consett, Co. Durham, UK. In: Environmental science & technology. DOI: 10.1021/acs.est.8b01883.

"Carbonate formation in waste from the steel industry could constitute a non-trivial proportion of global requirements to remove carbon dioxide from the atmosphere at potentially low cost. To constrain this potential, we examined atmospheric carbon dioxide sequestration in a >20 million tonne legacy slag deposit in northern England, UK. Carbonates formed from the drainage water of the heap had stable carbon and oxygen isotopes between -12 and -25 ‰ and -5 and -18 ‰ for δ13C and δ18O respectively, suggesting atmospheric carbon dioxide sequestration in high pH solutions. From analysis of solution saturation state, we estimate that between 280 and 2,900 tCO2 have precipitated from the drainage waters. However, by combining a thirty-seven-year dataset of the drainage water chemistry with geospatial analysis, we estimate that <1 % of the maximum carbon capture potential of the deposit may have been realised. This implies that uncontrolled deposition of slag is insufficient to maximise carbon sequestration, and there may be considerable quantities of unreacted legacy deposits available for atmospheric carbon sequestration."

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21.06.2018

# New Publications

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Keller, David; et al. (2018): The Effects of Carbon Dioxide Removal on the Carbon Cycle

Keller, David P.; Lenton, Andrew; Littleton, Emma W.; Oschlies, Andreas; Scott, Vivian; Vaughan, Naomi E. (2018): The Effects of Carbon Dioxide Removal on the Carbon Cycle. In: Curr Clim Change Rep 118 (1), S. 105. DOI: 10.1007/s40641-018-0104-3.

"Here, we review the carbon cycle responses to different CDR approaches and highlight the often-overlooked interaction and feedbacks between carbon reservoirs that ultimately determines CDR efficacy. We also identify future research that will be needed if CDR is to play a role in climate change mitigation, these include coordinated studies to better understand (i) the underlying mechanisms of each method, (ii) how they could be explicitly simulated, (iii) how reversible changes in the climate and carbon cycle are, and (iv) how to evaluate and monitor CDR."

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21.06.2018

# New Publications

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Gough, Clair; et al. (2018): Challenges to the use of BECCS as a keystone technology in pursuit of 1.5⁰C

Gough, Clair; Garcia-Freites, Samira; Jones, Christopher; Mander, Sarah; Moore, Brendan; Pereira, Cristina et al. (2018): Challenges to the use of BECCS as a keystone technology in pursuit of 1.5⁰C. In: Glob. Sustain. 1, S. 95. DOI: 10.1017/sus.2018.3.

"Biomass energy with carbon capture and storage (BECCS) is represented in many integrated assessment models as a keystone technology in delivering the Paris Agreement on climate change. This paper explores six key challenges in relation to large scale BECCS deployment and considers ways to address these challenges. Research needs to consider how BECCS fits in the context of other mitigation approaches, how it can be accommodated within existing policy drivers and goals, identify where it fits within the wider socioeconomic landscape, and ensure that genuine net negative emissions can be delivered on a global scale."

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18.06.2018

# New Publications

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Talberg, Anita; et al. (2018): A scenario process to inform Australian geoengineering policy

Talberg, Anita; Thomas, Sebastian; Wiseman, John (2018): A scenario process to inform Australian geoengineering policy. In: Futures. DOI: 10.1016/j.futures.2018.06.003.

"Australia’s role in geoengineering can be described as passive in the global context, but Australia can benefit from an early transition to a low-carbon economy. A review of the evolution of ideas throughout the exercise reveals a process of shared learning that helps to focus governance discussions around key issues. This study is one step towards increasing the presence and influence of the Asia-Pacific in geoengineering discussions, and highlights the value that a tailored scenario exercise can bring to governance discussions."

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18.06.2018

# New Publications

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Markus, Till; et al. (2018): An Assessment of Climate Engineering from a Buddhist Perspective

Markus, Till; Vivekānanda, Bhikkhu; Lawrence, Mark (2018): An Assessment of Climate Engineering from a Buddhist Perspective. In Journal for the Study of Religion, Nature and Culture. DOI: 10.1558/jsrnc.34831

"This article expounds a Buddhist perspective on the rapidly emerging topic of Climate Engineering, i.e. the deliberate, large-scale manipulation of the environment as a proposed means to counteract anthropogenic climate change or some of its specific aspects like global mean temperature increase. It sets the stage with two orthogonal aspects: an overview of the topic of Climate Engineering, and a broader analysis of the Buddhist perspective on mankind’s relationship with nature. Linking these together, we show that as one of the world’s major faiths, Buddhism can provide valuable insights and perspectives for the evolving global discourse on Climate Engineering methods, and that it advocates some basic requirements concerning their further development and possible future deployment."

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09.06.2018

# New Publications

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Keith, David W.; et al. (2018): A Process for Capturing CO 2 from the Atmosphere

Keith, David W.; Holmes, Geoffrey; St. Angelo, David; Heidel, Kenton (2018): A Process for Capturing CO 2 from the Atmosphere. In Joule. DOI: 10.1016/j.joule.2018.05.006.

"We describe a process for capturing CO2 from the atmosphere in an industrial plant. The design captures ∼1 Mt-CO2/year in a continuous process using an aqueous KOH sorbent coupled to a calcium caustic recovery loop. We describe the design rationale, summarize performance of the major unit operations, and provide a capital cost breakdown developed with an independent consulting engineering firm."

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09.06.2018

# New Publications

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Gupta, Aarti; Möller, Ina (2018): De facto governance. How authoritative assessments construct climate engineering as an object of governance

Gupta, Aarti; Möller, Ina (2018): De facto governance. How authoritative assessments construct climate engineering as an object of governance. In Environmental Politics 5 (1), pp. 1–22. DOI: 10.1080/09644016.2018.1452373.

"In contrast, here it is argued that de facto governance of CE is underway, discernible in an ordering of this nascent field of inquiry by unacknowledged sources of steering. One key source of de facto governance is analyzed: high-level ‘authoritative assessments’ of CE. The focus is on how these assessments are constructing CE as an object of governance through demarcating and categorizing this emerging field of inquiry, and how this contributes to normalizing and institutionalizing CE research (and CE research communities)."

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08.06.2018

# New Publications

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Roshan, Elnaz; et al. (2018): Cost-Risk Trade-Off of Mitigation and Solar Geoengineering. Considering Regional Disparities Under Probabilistic Climate Sensitivity

Roshan, Elnaz; M. Khabbazan, Mohammad; Held, Hermann (2018): Cost-Risk Trade-Off of Mitigation and Solar Geoengineering. Considering Regional Disparities Under Probabilistic Climate Sensitivity. In Environ Resource Econ 113 (9), p. 5886. DOI: 10.1007/s10640-018-0261-9.

"Here, we investigate to what extent a proponent of the 2 °C-temperature target would apply SGE in conjunction with mitigation in view of regional disparities in temperature and precipitation. We apply cost-risk analysis (CRA), which is a decision analytic framework that trades-off expected welfare-loss from climate policy costs and climate risks from transgressing a climate target. Here, in ‘Giorgi’-regional-scale analyses, we evaluate the optimal mix of SGE and mitigation under probabilistic information about climate sensitivity and generalize CRA in order to include regional temperature and precipitation risks."

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04.06.2018

# New Publications

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Moreno-Cruz, Juan B.; et al. (2018): An Economic Anatomy of Optimal Climate Policy

Moreno-Cruz, Juan B.; Wagner, Gernot; Keith, David W. (2018): An Economic Anatomy of Optimal Climate Policy. Munich Society for the Promotion of Economic Research ‐ CESifo (CESifo Working Papers).

"This paper introduces geoengineering into an optimal control model of climate change economics. Together with mitigation and adaptation, carbon and solar geoengineering span the universe of possible climate policies. Their wildly different characteristics have important implications for climate policy."

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04.06.2018

# New Publications

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Buck, Holly Jean (2018): The politics of negative emissions technologies and decarbonization in rural communities

Buck, Holly Jean (2018): The politics of negative emissions technologies and decarbonization in rural communities. In Glob. Sustain. 1, p. 327. DOI: 10.1017/sus.2018.2.

"This paper analyzes prospective challenges for negative emissions through examining how decarbonization practices are evolving in one particular landscape: the Imperial Valley in southeast California, a desert landscape engineered for industrial agriculture. Based on semi-structured interviews and site visits, this paper examines how community actors have received, participated in, imagined or contested new energy technologies and climate practices, and draws out takeaways for negative emissions policy."

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