The Feasibility of Shading the Greenhouse with Dust Clouds at the Stable Lunar Lagrange Points
From The Space Library
Author - C. Struck
Co-Author(s) -
JBIS Volume # - 60
Page # - 82-89
Year - 2007
Keywords - Global warming, solar shades, restricted N-body problem, NEO comets
JBIS Reference Code # - 2007.60.82
Number of Pages - 8
[edit] Abstract
There are many indications that anthropogenic global warming poses a serious threat to our civilization and its ecological support systems. Ideally this problem will be overcome by reducing greenhouse gas emissions. Various space-based methods, including large-scale solar shades, diffusers or atmospheric pollutants, have been considered to reduce the solar constant (input flux) and the warming in case emissions reductions are not achieved in a timely way. Here it is pointed out that proposed technologies for near-Earth orbiting comet deflection, suggest a different kind of space-based solar shade. This shade would be made up of micron-sized dust particles derived from comet fragments or lunar mining, and positioned in orbits near the triangular Lagrange points of the Earth-Moon system. Solar radiation pressure can render such orbits unstable, but a class of nearly resonant, and long-lived orbits is shown to exist, though the phase space volume of such orbits depends on dust grain size. Advantages and disadvantages of this scheme relative to others are considered.
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