Hommel, René; Graf, Hans-F (2011): Modelling the size distribution of geoengineered stratospheric aerosols. In: Atmosph. Sci. Lett 12 (2), S. 168–175. DOI: 10.1002/asl.285

"A modelling study on the growth of geoengineered stratospheric aerosols reveals that in steady state a large fraction of aerosols grow to micrometre sizes so that the sedimentation of aerosols might limit the geoengineered aerosol layer's ability to achieve its target cooling effect."

The report concentrates on risk analysis and decision framework.

Link

Carlin, A. (2011), ‘A Multidisciplinary, Science-Based Approach to the Economics of Climate Change’, IJERPH, 8/4: 985–1031.

"Economic analyses of environmental mitigation and other interdisciplinary public policy issues can be much more useful if they critically examine what other disciplines have to say, insist on using the most relevant observational data and the scientific method, and examine lower cost alternatives to the change proposed. These general principles are illustrated by applying them to the case of climate change mitigation, one of the most interdisciplinary of public policy issues. [...] The risk of catastrophic anthropogenic global warming appears to be so low that it is not currently worth doing anything to try to control it, including geoengineering."

Horton, J. B. (2011), ‘Geoengineering and the Myth of Unilateralism: Pressures and Prospects for International Cooperation’, Stanford Journal of Law, Science & Policy, IV: 56–69.

"In this article, I argue that fear of unilateralism is largely misplaced, grounded more in unexamined policy assumptions than in reasoned analysis of the strategic situation faced by states. I will present this argument in five parts. First, I will document the widespread notion that unilateral geoengineering poses a genuine threat to the international order. Second, I will closely examine the interests and constraints that are likely to confront states contemplating intervention in the climate system. Third, I will demonstrate that international dynamics are
more likely to create pressures leading to cooperation than to foster tendencies toward unilateralism. Fourth, I will consider different mechanisms for encouraging collaboration on climate intervention strategies. Finally, I will consider the implications of this argument for future discussions of geoengineering."