04-25-2015, 07:37 PM
Yes; that paper includes the idea of a bouyant layer that shades the surface, gradually cooling and eventually settling on top of a layer of frozen carbon dioxide. This idea requires that we not only cool Venus, but make it so cool that it has CO2 permafrost; an interesting idea, and sure to find application in the OA universe somewhere, but it seems a little reckless. If civilisation suffers a Ringworld-like collapse, the CO2 would start to form geysers eventually, making the planet uninhabitable again. On the other hand, many OA megaprojects have the same shortcoming- they are not all futureproof.