The feasibility of using an L1 positioned dust cloud as a method of space-based geoengineering

Russell Bewick, Joan-Pau Sanchez Cuartielles, Colin McInnes

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
406 Downloads (Pure)


In this paper a method of geoengineering is proposed involving clouds of dust placed in the vicinity of the L1 point as an alternative to the use of thin film reflectors. The aim of this scheme is to reduce the manufacturing requirement
for space-based geoengineering. It has been concluded that the mass requirement for a cloud placed at the classical L1 point, to create an average solar insolation reduction of 1.7%, is 7.60x1010 kg yr−1 whilst a cloud placed at a displaced equilibrium point created by the inclusion of the effect of solar radiation pressure is 1.87x1010 kg yr−1. These mass ejection rates are considerably less than the mass required in other unprocessed dust cloud methods proposed and are comparable to thin film reflector geoengineering requirements. Importantly, unprocessed dust sourced in-situ is seen as an attractive scheme compared to highly engineered thin film reflectors. It is envisaged that the required mass of dust can be extracted from captured near Earth asteroids, whilst stabilised in the required position using the impulse
provided by solar collectors or mass drivers used to eject material from the asteroid surface.
Original languageEnglish
Pages (from-to)1212-1228
JournalAdvances in Space Research
Issue number7
Publication statusPublished - 1 Apr 2012


  • geoengineering
  • dust cloud
  • lagrange point
  • three-body problem


Dive into the research topics of 'The feasibility of using an L1 positioned dust cloud as a method of space-based geoengineering'. Together they form a unique fingerprint.

Cite this