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

Bewick, R., Sanchez, J.P. and McInnes, C.R. (2012) The feasibility of using an L1 positioned dust cloud as a method of space-based geoengineering. Advances in Space Research, 49(7), pp. 1212-1228. (doi:10.1016/j.asr.2012.01.010)

Bewick, R., Sanchez, J.P. and McInnes, C.R. (2012) The feasibility of using an L1 positioned dust cloud as a method of space-based geoengineering. Advances in Space Research, 49(7), pp. 1212-1228. (doi:10.1016/j.asr.2012.01.010)

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Publisher's URL: http://dx.doi.org/10.1016/j.asr.2012.01.010

Abstract

In this paper a method of geoengineering is proposed involving clouds of dust placed in the vicinity of the L<sub>1</sub> 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 L<sub>1</sub> point, to create an average solar insolation reduction of 1.7%, is 7.60 × 10<sup>10</sup> kg yr<sup>−1</sup> whilst a cloud placed at a displaced equilibrium point created by the inclusion of the effect of solar radiation pressure is 1.87 × 10<sup>10</sup> kg yr<sup>−1</sup>. 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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McInnes, Professor Colin
Authors: Bewick, R., Sanchez, J.P., and McInnes, C.R.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Advances in Space Research
Publisher:Elsevier
ISSN:0273-1177
ISSN (Online):1879-1948

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