Another way to reflect more sunlight back into space is to increase reflectivity of the world’s marine clouds, which cover a quarter of the ocean’s surface.
John Latham and Stephen Salter of the University of Edinburgh have proposed wind-powered yachts that would spray seawater droplets into the air to produce more clouds.
Latham says that about a thousand of these vessels would be needed to make the plan effective, and that they should be deployed in the southern oceans, where most reflective marine stratocumulus clouds are.
But more testing is necessary to better understand the ecological and meteorological consequences. Open Knowledge, 10 Jul 2011