German newspaper article on CE.

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"Scholars of geoengineering have reported increasing interest in their work this month as humans seem increasingly unlikely to avert catastrophic global warming. Governments, universities, think tanks and international bodies are turning to the idea of tinkering with the earth by making it absorb more carbon dioxide or reflect more sunlight into space, the scholars said."

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"With this in mind, we asked members of our Board of Advisors, made up of physical and social scientists, to comment on the question “Could climate engineering technologies be used to slow or weaken hurricanes? Is this a research question worth proposing or a distraction?” "

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Visioni, Daniele; Pitari, Giovanni; Aquila, Valentina; Tilmes, Simone; Cionni, Irene; Di Genova, Glauco; Mancini, Eva (2017): Sulfate geoengineering impact on methane transport and lifetime. Results from the Geoengineering Model Intercomparison Project (GeoMIP). In Atmos. Chem. Phys 17 (18), pp. 11209–11226. DOI: 10.5194/acp-17-11209-2017.

"Sulfate geoengineering (SG), made by sustained injection of SO₂ in the tropical lower stratosphere, may impact the CH₄ abundance through several photochemical mechanisms affecting tropospheric OH and hence the methane lifetime. (a) The reflection of incoming solar radiation increases the planetary albedo and cools the surface, with a tropospheric H₂O decrease. (b) The tropospheric UV budget is upset by the additional aerosol scattering and stratospheric ozone changes: the net effect is meridionally not uniform, with a net decrease in the tropics, thus producing less tropospheric O(¹D). (c) The extratropical downwelling motion from the lower stratosphere tends to increase the sulfate aerosol surface area density available for heterogeneous chemical reactions in the mid-to-upper troposphere, thus reducing the amount of NO_x and O₃ production. (d) The tropical lower stratosphere is warmed by solar and planetary radiation absorption by the aerosols."

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