Efficient formation of stratospheric aerosol for climate engineering by emission of condensible vapor from aircraft

Details Efficient formation of stratospheric aerosol for climate engineering by emission of condensible vapor from aircraft Efficient formation of stratospheric aerosol for climate engineering by emission of condensible vapor from aircraft

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3718805p&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 18, CiteID L18805

Physics

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Global Change: Atmosphere (0315, 0325), Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513)

Scientific paper

Recent analysis suggests that the effectiveness of stratospheric aerosol climate engineering through emission of non-condensable vapors such as SO2 is limited because the slow conversion to H2SO4 tends to produce aerosol particles that are too large; SO2 injection may be so inefficient that it is difficult to counteract the radiative forcing due to a CO2 doubling. Here we describe an alternate method in which aerosol is formed rapidly in the plume following injection of H2SO4, a condensable vapor, from an aircraft. This method gives better control of particle size and can produce larger radiative forcing with lower sulfur loadings than SO2 injection. Relative to SO2 injection, it may reduce some of the adverse effects of geoengineering such as radiative heating of the lower stratosphere. This method does not, however, alter the fact that such a geoengineered radiative forcing can, at best, only partially compensate for the climate changes produced by CO2.

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