http://www.sciencedirect.com/science/article/pii/S0273117712004504
Abstract This paper presents a novel method of space-based geoengineering which uses the mass of a captured near Earth asteroid to gravitationally anchor a cloud of unprocessed dust in the vicinity of the L1 position to reduce the level of solar insolation at Earth. It has subsequently been shown that a cloud contained within the zero-velocity curve of the largest near Earth asteroid, Ganymed, can lead to an insolation reduction of 6.58% on Earth, which is significantly larger than the 1.7% required to offset a 2 °C increase in mean global temperature. The masses of the next largest near Earth asteroids are found to be too small to achieve the required level of insolation reduction, however, they are significant enough to be used as part of a portfolio of geoengineering schemes. Highlights ► We investigate using dust clouds at the first Lagrange point for geoengineering. ► Model the zero-velocity curve in the four body problem using an asteroid at L1. ► The reduction in insolation at Earth is found and compared to 1.7% requirement. ► Largest near Earth asteroid, Ganymed, can reduce the insolation by 6.58%. Keywords Geoengineering; Lagrange point; Four-body problem; Zero-velocity curve -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
