Produce an increase in white light relative to clear sky conditions.ĭiffuse sky spectra in our simulations of geoengineering with Indicating little change in sky hue, but all particle size distributions Spectra show little change in dominant wavelength, (˜0.9 μm) preferentially increase diffuse irradiance in blue Increase diffuse irradiance in red wavelengths, whereas large particles Particles of radius ˜0.5 μm preferentially Particles with small radii have little influence on the Is less when optically thin cirrus clouds are included in our Times, depending on the aerosol size distribution. A 2% reduction in total irradiance, approximatelyĮnough to offset anthropogenic warming for a doubling of CO2Ĭoncentrations, brightens the sky (increase in diffuse light) by 3 to 5 Model to calculate spectral irradiance for idealized size distributions With a non-uniform spectral distribution. Stratosphere would increase diffuse light received at the surface, but One proposed side effect of geoengineering with stratospheric sulfateĪerosols is sky whitening during the day and afterglows near sunset, as
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