SRM stands for Solar Radiation Management, and it includes all the geoengineering schemes that increase earth’s albedo in order to reflect more sunlight back into space, and in so doing reduce the net irradiance of the earth. These schemes include injection of sulfur dioxide into the upper atmosphere, artificially increasing ocean cloud albedo by seeding said clouds with sub-micron droplets of sea water, parking a fleet of space mirrors at an appropriate earth / sun Lagrangian point, etc.
(Moments ago I had to look up this acronym in Google and couldn’t find it. So I thought I’d do a little experiment in which I put up the correct definition of the term, in order to see if it starts showing up under a “define: SRM” search some weeks hence.)
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