Reynolds, J.; Wagner, G. (2019): Highly decentralized solar geoengineering. In: Environmental Politics 4 (3), S. 1–17. DOI: 10.1080/09644016.2019.1648169.

"Nonstate actors appear to have increasing power, in part due to new technologies that alter actors’ capacities and incentives. Although solar geoengineering is typically conceived of as centralized and state-deployed, we explore highly decentralized solar geoengineering. Done perhaps through numerous small high-altitude balloons, it could be provided by nonstate actors such as environmentally motivated nongovernmental organizations or individuals."

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Gruber, S.; Blahak, U.; Haenel, F.; Kottmeier, C.; Leisner, T.; Muskatel, H. et al. (2019): A Process Study on Thinning of Arctic Winter Cirrus Clouds With High‐Resolution ICON‐ART Simulations. In: J. Geophys. Res. Atmos. 498 (21), S. 339. DOI: 10.1029/2018JD029815.

"In this study, cloud‐resolving simulations of a case study for a limited area of the hibernal Arctic were performed with the atmospheric modeling system ICON‐ART (ICOsahedral Nonhydrostatic‐Aerosol and Reactive Trace gases). A thorough comparison with data both from satellite as well as aircraft measurement is presented to validate the simulations. In addition, the model is applied to clarify the microphysical processes occurring when introducing artificial aerosol particles into the upper troposphere with the aim of modifying cirrus clouds in the framework of climate engineering."

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Colvin, R.; Kemp, L.; Talberg, A.; Castella, C. de; Downie, C.; Friel, S. et al. (2019): Learning from the Climate Change Debate to Avoid Polarisation on Negative Emissions. In: Environmental Communication 28, S. 1–13. DOI: 10.1080/17524032.2019.1630463.

"This paper identifies critical lessons from the climate change experience to guide how communications and engagement on negative emissions can be conducted to encourage functional public and policy discourse. Negative emissions technologies present a significant opportunity for limiting climate change, and are likely to be necessary to keep warming below 2°C."

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Stenzel, F.; Gerten, D.; Werner, C.; Jägermeyr, J. (2019): Freshwater requirements of large-scale bioenergy plantations for limiting global warming to 1.5 °C. In: Environ. Res. Lett. 14 (8), S. 84001. DOI: 10.1088/1748-9326/ab2b4b.

"This paper provides a first-order quantification of the biophysical potentials of BECCS as a negative emission technology contribution to reaching the 1.5 °C warming target, as constrained by associated water availabilities and requirements. Using a global biosphere model, we analyze the availability of freshwater for irrigation of BPs designed to meet the projected NEs to fulfill the 1.5 °C target, spatially explicitly on areas not reserved for ecosystem conservation or agriculture."

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