19.02.2017

# New Publications

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Boettcher, Miranda; Schäfer, Stefan (2017): Reflecting upon 10 Years of Geoengineering Research. Introduction to the Crutzen + 10 Special Issue

Boettcher, Miranda; Schäfer, Stefan (2017): Reflecting upon 10 Years of Geoengineering Research. Introduction to the Crutzen + 10 Special Issue. In Earth's Future. DOI: 10.1002/2016EF000521.

"In this introduction, we briefly outline the arguments made in Paul Crutzen's 2006 contribution and describe the key developments of the past 10 years. We then proceed to give an overview of some of the central issues in current discussions on geoengineering, and situate the contributions to this special issue within them. In particular, we contend that geoengineering research is characterized by an orientation toward speculative futures that fundamentally shapes how geoengineering is entering the collective imagination of scientists, policymakers, and publics, and a mode of knowledge production that recognizes the risks which may result from new knowledge and that struggles with its own socio-political dimensions."

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14.02.2017

# New Publications

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Fuss, Sabine; et al. (2016): Research priorities for negative emissions

Fuss, Sabine; Jones, Chris D.; Kraxner, Florian; Peters, Glen P.; Smith, P.; Tavoni, Massimo et al. (2016): Research priorities for negative emissions. In Environ. Res. Lett. 11 (11), p. 115007. DOI: 10.1088/1748-9326/11/11/115007.

"While there are few pathways to 2 °C that do not rely on negative emissions, 1.5 °C scenarios are barely conceivable without them. Building on previous assessments of NETs, we identify some urgent research needs to provide a more complete picture for reaching ambitious climate targets, and the role that NETs can play in reaching them."

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11.02.2017

# New Publications

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Quaas, Martin F.; et al. (2017): Are there reasons against open-ended research into solar radiation management? A model of intergenerational decision-making under uncertainty

Quaas, Martin F.; Quaas, Johannes; Rickels, Wilfried; Boucher, Olivier (2017): Are there reasons against open-ended research into solar radiation management? A model of intergenerational decision-making under uncertainty. In Journal of Environmental Economics and Management. DOI: 10.1016/j.jeem.2017.02.002.

"We propose a stylized model of intergenerational decision making on SRM research, greenhouse-gas abatement and SRM deployment, under uncertainties about (a) the extent of future climate damage and (b) effectiveness and potential harmful side-effects of SRM. Open-ended research may reveal either that SRM effectively reduces climate damage, or that it would cause more harm than benefits. We find that SRM research increases the likelihood of deployment (“slippery slope”), and derive conditions that it decreases abatement effort in expectation (“moral hazard”)."

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10.02.2017

# New Publications

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Altvater, Elmar (2016): The Capitalocene, or, Geoengineering against Capitalism’s Planetary Boundaries

Altvater, Elmar (2016): The Capitalocene, or, Geoengineering against Capitalism’s Planetary Boundaries. In Jason W. Moore (Ed.): Anthropocene or Capitalocene? Nature, history, and the crisis of capitalism. Oakland, CA: PM Press (Kairos), pp. 138–152.

"Today’s great questions are about how capitalism works through, and actively creates, planetary nature."

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09.02.2017

# New Publications

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Reynolds, Jesse (2016): Solar Climate Engineering, Law, and Regulation

Reynolds, Jesse (2016): Solar Climate Engineering, Law, and Regulation. In Roger Brownsword, Eloise Scotford, Karen Yeung (Eds.): The Oxford handbook of the law and regulation of technology. Oxford: Oxford University Press.

"This chapter offers an introduction to solar climate engineering, and explores its potential, risks, and legal and regulatory challenges. It also contextualizes these proposals with respect to other emerging technologies and the broader socio-political milieu. The chapter discusses the contours of existing and potential regulation, particularly at the international level. These aspects include regulatory rationales, diverse characteristics of proposed regulatory regimes, difficulties in defining the regulatory target, and the management of uncertainty through precaution."

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09.02.2017

# New Publications

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Mathias, Jean-Denis; et al. (2017): On our rapidly shrinking capacity to comply with the planetary boundaries on climate change

Mathias, Jean-Denis; Anderies, John M.; Janssen, Marco A. (2017): On our rapidly shrinking capacity to comply with the planetary boundaries on climate change. In Scientific reports 7, p. 42061. DOI: 10.1038/srep42061.

"Here, we use the DICE model to analyze the set of adaptive climate policies that comply with the two planetary boundaries related to climate change: (1) staying below a CO2 concentration of 550 ppm until 2100 and (2) returning to 350 ppm in 2100. Our results enable decision makers to assess the following milestones: (1) a minimum of 33% reduction of CO2 emissions by 2055 in order to stay below 550 ppm by 2100 (this milestone goes up to 46% in the case of delayed policies); and (2) carbon neutrality and the effective implementation of innovative geoengineering technologies (10% negative emissions) before 2060 in order to return to 350 ppm in 2100, under the assumption of getting out of the baseline scenario without delay."

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09.02.2017

# New Publications

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Asayama, Shinichiro; et al. (2017): Ambivalent climate of opinions. Tensions and dilemmas in understanding geoengineering experimentation

Asayama, Shinichiro; Sugiyama, Masahiro; Ishii, Atsushi (2017): Ambivalent climate of opinions. Tensions and dilemmas in understanding geoengineering experimentation. In Geoforum 80, pp. 82–92. DOI: 10.1016/j.geoforum.2017.01.012.

"This paper examines how the meanings of geoengineering experimentation, specifically SAI field trials, are reconfigured in the deliberation of the lay public. To this end, we conducted focus groups with Japanese citizens in June 2015 on the geoengineering concept and SAI field trials."

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07.02.2017

# New Publications

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Laakso, Anton; et al. (2017): Radiative and climate effects of stratospheric sulfur geoengineering using seasonally varying injection areas

Laakso, Anton; Korhonen, Hannele; Romakkaniemi, Sami; Kokkola, Harri (2017): Radiative and climate effects of stratospheric sulfur geoengineering using seasonally varying injection areas. In: Atmos. Chem. Phys. Discuss., S. 1–25. DOI: 10.5194/acp-2017-107.

"In this study we employ alternative aerosol injection scenarios to investigate if the resulting radiative forcing can be optimized to be zonally more uniform without decreasing the global efficacy. We used a global aerosol-climate model together with an Earth system model to study the radiative and climate effects of stratospheric sulfur injection scenarios with different injection areas. According to our simulations, varying the SO2 injection area seasonally would result in a similar global mean cooling effect as injecting SO2 to the equator, but with a more uniform zonal distribution of shortwave radiative forcing."

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05.02.2017

# New Publications

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Fridahl, Mathias (2017): Socio-political prioritization of bioenergy with carbon capture and storage

Fridahl, Mathias (2017): Socio-political prioritization of bioenergy with carbon capture and storage. In: Energy Policy 104, S. 89–99. DOI: 10.1016/j.enpol.2017.01.050 .

"This article provides a unique intercontinental mapping of the prioritization of BECCS for the long term transition of the electricity supply sector. Based on survey responses from 711 UN climate change conference delegates, the article reports the low prioritization of BECCS relative to alternative technologies, indicating an urgent need for studies of the socio-political preconditions for large-scale BECCS deployment."

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02.02.2017

# New Publications

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Kärcher, Bernd (2017): Cirrus Clouds and Their Response to Anthropogenic Activities

Kärcher, Bernd (2017): Cirrus Clouds and Their Response to Anthropogenic Activities. In: Curr Clim Change Rep. DOI: 10.1007/s40641-017-0060-3.

"This review assesses recent observational and modeling evidence of how anthropogenic activities might affect cirrus. Changes in physical properties and chemical composition of liquid aerosol particles will unlikely affect cirrus significantly, but anthropogenic influences may occur through changes in heterogeneous ice nuclei."

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