18.03.2019

# New Publications

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Belaia, M. (2019): Optimal Climate Strategy with Mitigation, Carbon Removal, and Solar Geoengineering

Belaia, M. (2019): Optimal Climate Strategy with Mitigation, Carbon Removal, and Solar Geoengineering. Online verfügbar unter http://arxiv.org/pdf/1903.02043v1.

"Until recently, analysis of optimal global climate policy has focused on mitigation. Exploration of policies to meet the 1.5°C target have brought carbon dioxide removal (CDR), a second instrument, into the climate policy mainstream. [...] Here, I extend the Dynamic Integrated model of Climate and Economy (DICE) to include both CDR and SG to explore the temporal ordering of the three instruments. Contrary to implicit assumptions that SG would be employed only after mitigation and CDR are exhausted, I find that SG is introduced parallel to mitigation temporary reducing climate risks during the era of peak CO2 concentrations."

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17.03.2019

# New Publications

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GESAMP (2019): High level review of a wide range of proposed marine geoengineering techniques

GESAMP (2019): High level review of a wide range of proposed marine geoengineering techniques. GESAMP Working Group 41. (Boyd P. and Vivian C. eds.)(98).

"This report comprehensively examines a wide range o marine geoengineering techniques to remove carbon dioxide from the atmosphere or boost the reflection of incoming solar radiation to space (albedo modification) or in some cases both. Further, the report recommends a) that a coordinated framework for proposing marine geoengineering activities, submitting supporting evidence and integrating independent expert assessment must be developed and b) that a greater expertise on wider societal issues is sought with the aim to establish a knowledge base and provide a subsequent analysis of the major gaps in socio-economics and geopolitics."

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13.03.2019

# New Publications

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Irvine, P.; et al. (2019): Halving warming with idealized solar geoengineering moderates key climate hazards

Irvine, P.; Emanuel, K.; He, J.; Horowitz, L.; Vecchi, G.; Keith, D. (2019): Halving warming with idealized solar geoengineering moderates key climate hazards. In: Nature Climate change. DOI: 10.1038/s41558-019-0398-8.

"Solar geoengineering (SG) has the potential to restore average surface temperatures by increasing planetary albedo, but this could reduce precipitation. Thus, although SG might reduce globally aggregated risks, it may increase climate risks for some regions. Here, using the high-resolution forecast-oriented low ocean resolution (HiFLOR) model—which resolves tropical cyclones and has an improved representation of present-day precipitation extremesalongside 12 models from the Geoengineering Model Intercomparison Project (GeoMIP), we analyse the fraction of locations that see their local climate change exacerbated or moderated by SG. Rather than restoring temperatures, we assume that SG is applied to halve the warming produced by doubling CO2 (half-SG)."

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11.03.2019

# New Publications

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The National Academies of Science Engineering Medicine (2019): Negative Emissions Technologies and Reliable Sequestration

The National Academies of Science Engineering Medicine (2019): Negative Emissions Technologies and Reliable Sequestration. Washington, D.C.: National Academies Press. DOI: 10.17226/25259

"To achieve goals for climate and economic growth, “negative emissions technologies” (NETs) that remove and sequester carbon dioxide from the air will need to play a significant role in mitigating climate change. Unlike carbon capture and storage technologies that remove carbon dioxide emissions directly from large point sources such as coal power plants, NETs remove carbon dioxide directly from the atmosphere or enhance natural carbon sinks. Storing the carbon dioxide from NETs has the same impact on the atmosphere and climate as simultaneously preventing an equal amount of carbon dioxide from being emitted. Recent analyses found that deploying NETs may be less expensive and less disruptive than reducing some emissions, such as a substantial portion of agricultural and land-use emissions and some transportation emissions."

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11.03.2019

# New Publications

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Rogers, K.; et al. (2019): Wetland carbon storage controlled by millennial-scale variation in relative sea-level rise

Rogers, K.; Kelleway, J.; Saintilan, N.; Megonigal, P.; Adams, J.; Holmquist, J. et al. (2019): Wetland carbon storage controlled by millennial-scale variation in relative sea-level rise. In: Nature 567 (7746), S. 91–95. DOI: 10.1038/s41586-019-0951-7.

"Coastal wetlands (mangrove, tidal marsh and seagrass) sustain the highest rates of carbon sequestration per unit area of all natural systems, primarily because of their comparatively high productivity and preservation of organic carbon within sedimentary substrates. [...] Our results suggest that coastal wetlands characteristic of tectonically stable coastlines have lower carbon storage owing to a lack of accommodation space and that carbon sequestration increases according to the vertical and lateral accommodation space created by RSLR. Such wetlands will provide long-term mitigating feedback effects that are relevant to global climate–carbon modelling."

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11.03.2019

# New Publications

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United Nations (2019): United Nations Environment Assembly of the United Nations Environment Programme

"The secretariat has the honour to present, set out in the annex to the present note, the summary for policymakers of the report of the International Resource Panel entitled Global Resources Outlook 2019: Natural Resources for the Future We Want."

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11.03.2019

# New Publications

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Creutzig, F.; et al. (2019): The mutual dependence of negative emission technologies and energy systems

Creutzig, F.; Breyer, C.; Hilaire, J.; Minx, J.; Peters, G.; Socolow, R. (2019): The mutual dependence of negative emission technologies and energy systems. In: Energy Environ. Sci. DOI: 10.1039/C8EE03682A.

"While a rapid decommissioning of fossil fuel technologies deserves priority, most climate stabilization scenarios suggest that negative emission technologies (NETs) are required to keep global warming well below 2°C. Yet, current discussions on NETs are lacking a distinct energy perspective. Prominent NETs, such as bioenergy with carbon capture and storage (BECCS) and direct air carbon capture and storage (DACCS), will integrate differently into the future energy system, requiring a concerted research effort to determine adequate means of deployment. In this perspective, we discuss the importance of energy per carbon metrics, factors of future cost development, and the dynamic response of NETs in intermittent energy systems."

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11.03.2019

# New Publications

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Wang, X.; et al. (2019): Rechargeable Zn-CO2 Electrochemical Cells Mimicking Two-Step Photosynthesis

Wang, X.; Xie, J.; Ghausi, M.; Lv, Jiangquan; Huang, Y.; Wu, M. et al. (2019): Rechargeable Zn-CO2 Electrochemical Cells Mimicking Two-Step Photosynthesis. In: Advanced materials (Deerfield Beach, Fla.), e1807807. DOI: 10.1002/adma.201807807.

"Metal-CO2 batteries represent a promising priority for sustainable energy and the environment. However, CO2 utilization in nonaqueous electrolytes mostly involves difficult CO2 electrochemistry, leading to poor selectivity and limited cycle performance. "

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10.03.2019

# New Publications

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Wanser, K.; et al. (2019). Ensuring a Safe Climate. A SilverLining Report

Wanser, K.; Konar, M.; Bergeron, L. (2019). Ensuring a Safe Climate. A SilverLining Report. SilverLining. Online available: https://www.silverlining.ngo/ensuringasafeclimatereport.

"This report discusses the near-term risks of climate change; possible techniques that can be used to directly reduce warming in the climate; possible risks, benefits, and costs of these techniques; on overview of governance cosiderations and mechanisms; the nature of research for these techniques; the current state of play; and recommendations for policymakers for exploring these approaches to expand options for ensuring safety."

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10.03.2019

# New Publications

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Biermann, F.; et al. (2019): Rich man’s solution? Climate engineering discourses and the marginalization of the Global South

Biermann, F.; Möller, I. (2019): Rich man’s solution? Climate engineering discourses and the marginalization of the Global South. In: Int Environ Agreements 17 (1), S. 21. DOI: 10.1007/s10784-019-09431-0.

"Numerous recent studies project that ‘climate engineering’ technologies might need to play a major role in the future. Such technologies may carry major risks for developing countries that are often especially vulnerable to, and lack adaptive capacity to deal with, the impacts of such new technologies. [...] The article concludes by sketching options that developing countries may have to influence the agenda on climate engineering, reflecting on earlier attempts to increase control over novel technologies and influence global agenda setting."

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