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CL3.9

Geoengineering techniques and what does volcanic activity tell us?
Convener: Olivier Boucher  | Co-Conveners: Hauke Schmidt , Simone Tilmes , Claudia Timmreck 
Oral Programme
 / Mon, 04 Apr, 13:30–15:00  / Room 17
Poster Programme
 / Attendance Mon, 04 Apr, 17:30–19:00  / Display Mon, 04 Apr, 08:00–19:30  / Hall XL
Geoengineering schemes have been proposed to temporarily counteract global warming, as nations work to implement mitigation strategies based on reductions in greenhouse gas emissions. Examples include the injection of reflective aerosols into the lower stratosphere, seeding of marine clouds to modify their albedo, and placement of mirrors beyond the atmosphere to deflect incoming sunlight. While this session covers all so-called management techniques of the Earth’s radiative budget via processes internal or external to the atmosphere, special emphasis is placed on stratospheric aerosols and the climate impact of volcanic eruptions. Large volcanic eruptions are indeed considered as a natural albeit imperfect anolog for stratospheric aerosol injection. The impact of volcanic eruptions, their influence on atmospheric and ocean chemistry and dynamics as well as on the hydrological and carbon cycle and on vegetation are of high relevance to the session. This session also invites papers describing the most recent scientific and engineering results on global radiation control strategies. Particularly sought are objective and scientifically sound papers describing the feasibility, effectiveness, unintended consequences, risks, costs, and the ethical and political dimensions of global radiation intervention. Authors are encouraged to consider all of the local, regional and global impacts, including predictions of changes in climatological, biological, and socio-economical parameters. Presentations of well-developed designs for laboratory or field experiments relevant as well as data analysis and in-situ and remotes sensing techniques to the topics outlined above are also welcome.