Gravitationally bound geoengineering dust shade at the inner Lagrange point

R. Bewick, J.P. Sanchez Cuartielles, C.R. McInnes

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5 Citations (Scopus)
367 Downloads (Pure)

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, Ganymede, can lead to an insolation reduction of 6.58% on Earth, which is significantly larger than the 1.7% required to offset a 2C 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.
Original languageEnglish
Pages (from-to)1405-1410
Number of pages10
JournalAdvances in Space Research
Volume50
Issue number10
Early online date14 Jul 2012
DOIs
Publication statusPublished - 15 Nov 2012

Keywords

  • geoengineering
  • Lagrange point
  • four-body problem
  • zero-velocity curve

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