ANYONE clinging to the notion that we can wipe the slate clean of all our climate mistakes by deflecting the sun’s rays with space mirrors is in for a disappointment.
Dan Lunt of the University of Bristol, UK, and colleagues carried out the most detailed climate-modelling study to date on the impact of a sunshade. They simulated Earth’s climate under three scenarios: pre-industrial times; a future climate with atmospheric carbon dioxide at an extreme level of four times pre-industrial values; and a sunshaded geo-engineered climate with the same high CO2 levels but solar radiation reduced by 4 per…
