27.06.2016

# New Publications

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MacMartin, Douglas G.; Kravitz, Ben (2016): Multi-model dynamic climate emulator for solar geoengineering

MacMartin, Douglas G.; Kravitz, Ben (2016): Multi-model dynamic climate emulator for solar geoengineering. In Atmos. Chem. Phys. Discuss., pp. 1–14. DOI 10.5194/acp-2016-535.

"Climate emulators trained on existing simulations can be used to project the climate effects that would result from different possible future pathways of anthropogenic forcing, without relying on general circulation model (GCM) simulations for every possible pathway. We extend this idea to include different amounts of solar geoengineering in addition to different pathways of green-house gas concentrations by training emulators from a multi-model ensemble of simulations from the Geoengineering Model Intercomparison Project (GeoMIP)."

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24.06.2016

# New Publications

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Keith, David W.; et al. (2016): Modeling the effects of climate engineering

Keith, David W.; Wagner, Gernot; Moreno-Cruz, Juan B. (2016): Modeling the effects of climate engineering. In Science 352 (6293), pp. 1526–1527. DOI 10.1126/science.aag1630

"SRM is an important part of the future climate policy research agenda, as illustrated by the latest National Academy of
Sciences report. Economists need to embrace research on SRM technologies, recognize their capacity to disrupt
the climate policy agenda, focus on understanding the new impacts and risks introduced, and integrate this new  understanding into models and policy design."

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23.06.2016

# New Publications

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Visconti, Guido (2016): Geoengineering

Visconti, Guido (2016): Geoengineering. In Guido Visconti (Ed.): Fundamentals of physics and chemistry of the atmosphere: Springer, pp. 765–793.

Physical basis of CE, mostly SRM. "In the last few years, atmospheric physics had been invaded by a growing large number of researchers that got very excited about the possibility of changing artificially the environment to correct what the human beings (consciously or not) are doing to the climate."

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16.06.2016

# Media

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Bloomberg: A Climate Fix So Risky, Critics Say Don’t Even Study It

"The idea: Spray aerosols into the sky to block some sunshine. To advocates, it’s an emergency measure; to opponents, a massive gamble."

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06.06.2016

# Media

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Geoengineering Monitor: Study evaluates geo-engineering to reduce global warming by increasing aerosol levels

Response to Laakso, Anton (2016). "For those who lower their stress levels with the hope that we will be able to geo-engineer our way out of any impending global warming crises, here is another bit of sobering news."

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01.06.2016

# New Publications

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Elliott, Kevin C. (2016): Climate Geoengineering

Elliott, Kevin C. (2016): Climate Geoengineering. In Sven Ove Hansson, Gertrude Hirsch Hadorn (Eds.): Argumentative turn in policy analysis. Reasoning about uncertainty, vol. 10. [S.l.]: Springer (Logic, Argumentation & Reasoning), pp. 305–324.

"Instead, debates about climate geoengineering incorporate a wide variety of issues that can be fruitfully addressed using argumentative analysis. These include conceptual questions about how to characterize and frame the decision problem; ethical questions about the values and principles that should guide decision makers; and procedural questions about how to make decisions about climate geoengineering in a fair, legitimate manner."

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27.05.2016

# Media

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Inverse: The Crazy Plan to Zap Clouds with Lasers to Stop Climate Change

Media response to Matthews, M.; et al. (2016). "With the right kind of technology, it's possible."

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27.05.2016

# New Publications

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Matthews, M.; et al. (2016): Laser vaporization of cirrus-like ice particles with secondary ice multiplication

Matthews, M.; Pomel, F.; Wender, C.; Kiselev, A.; Duft, D.; Kasparian, J. et al. (2016): Laser vaporization of cirrus-like ice particles with secondary ice multiplication. In Science Advances 2 (5), e1501912-e1501912. DOI 10.1126/sciadv.1501912.

"We investigate the interaction of ultrashort laser filaments with individual 90-μm ice particles, representative of cirrus particles. The ice particles fragment under laser illumination. By monitoring the evolution of the corresponding ice/vapor system at up to 140,000 frames per second over 30 ms, we conclude that a shockwave vaporization supersaturates the neighboring region relative to ice, allowing the nucleation and growth of new ice particles, supported by laser-induced plasma photochemistry."

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25.05.2016

# New Publications

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Kravitz, Ben; et al. (2016): Geoengineering as a design problem

Kravitz, Ben; MacMartin, Douglas G.; Wang, Hailong; Rasch, Philip J. (2016): Geoengineering as a design problem. In Earth Syst. Dynam. 7 (2), pp. 469–497. DOI 10.5194/esd-7-469-2016.

"Here we turn this approach around by first choosing example climate objectives and then designing a strategy to meet those objectives in climate models. There are four essential criteria for designing a strategy: (i) an explicit specification of the objectives, (ii) defining what climate forcing agents to modify so the objectives are met, (iii) a method for managing uncertainties, and (iv) independent verification of the strategy in an evaluation model."

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24.05.2016

# New Publications

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Laakso, A.; et al. (2016): Radiative and climate impacts of a large volcanic eruption during stratospheric sulfur geoengineering

Laakso, A.; Kokkola, H.; Partanen, A.-I.; Niemeier, U.; Timmreck, C.; Lehtinen, K. E. J. et al. (2016): Radiative and climate impacts of a large volcanic eruption during stratospheric sulfur geoengineering. In Atmos. Chem. Phys. 16 (1), pp. 305–323. DOI 10.5194/acp-16-305-2016.

"Here we employ a global aerosol-climate model and an Earth system model to study the radiative and climate changes occurring after an erupting volcano during solar radiation management (SRM). According to our simulations the radiative impacts of the eruption and SRM are not additive and the radiative effects and climate changes occurring after the eruption depend strongly on whether SRM is continued or suspended after the eruption."

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