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Volume 15, issue 20 | Copyright
Atmos. Chem. Phys., 15, 11835-11859, 2015
https://doi.org/10.5194/acp-15-11835-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 26 Oct 2015

Research article | 26 Oct 2015

Solar geoengineering using solid aerosol in the stratosphere

D. K. Weisenstein et al.
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Blackstock, J. J., Battisti, D. S., Caldeira, K., Eardley, D. M., Katz, J. I., Keith, D. W., Patrinos, A. A. N., Schrag, D. P., Socolow, R. H., and Koonin, S. E.: Climate Engineering Responses to Climate Emergencies, Novim, available at: http://arxiv.org/ pdf/0907.5140 (last access: 21 October 2015), 2009.
Bohren, C. F. and Huffman, D. R.: Absorption and scattering of light by small particles, John Wiley & Sons, 2008.
Brock, C. A., Hamill, P., Wilson, J. C., Jonsson, H. H., and Chang, K. R.: Particle formation in the upper tropical troposphere: A source of nuclei for the stratospheric aerosol, Science, 270, 1650–1653, 1995.
Charlson, R. J., Langner, J., Rodhe, H., Leovy, C. B., and Warren, S. G.: Perturbation of the northern hemisphere radiative balance by backscattering from anthropogenic sulfate aerosols, Tellus A, 43, 152–163, 1991.
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We investigate stratospheric aerosol geoengineering with solid particle injection by modeling the fractal structure of alumina aerosols and their interaction with background sulfate. We analyze the efficacy (W m^-2 of radiative forcing per megaton of injection) and risks (ozone loss, s) for both alumina and diamond particles as a function of injected monomer radius, finding 240nm alumina and 160nm diamond optimal. We discuss the limitations of our 2-D model study and associated uncertainties.
We investigate stratospheric aerosol geoengineering with solid particle injection by modeling...
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