Hi All We might also need technology to remove lunar dust during some future ice age. Stephen
Emeritus Professor of Engineering Design School of Engineering University of Edinburgh Mayfield Road Edinburgh EH9 3DW Scotland 0131 650 5704 or 0131 662 1180 YouTube Jamie Taylor Power for Change From: geoengineering@googlegroups.com <geoengineering@googlegroups.com> On Behalf Of ayesha iqbal Sent: 09 February 2023 10:11 To: geoengineering@googlegroups.com Subject: [geo] Fwd: Dust as a solar shield This email was sent to you by someone outside the University. You should only click on links or attachments if you are certain that the email is genuine and the content is safe. https://journals.plos.org/climate/article?id=10.1371/journal.pclm.0000133 Authors Benjamin C. Bromley,<https://journals.plos.org/climate/article?id=10.1371/journal.pclm.0000133> Sameer H. Khan,<https://journals.plos.org/climate/article?id=10.1371/journal.pclm.0000133> Scott J. Kenyon<https://journals.plos.org/climate/article?id=10.1371/journal.pclm.0000133> 8 February 2023 Citation: Bromley BC, Khan SH, Kenyon SJ (2023) Dust as a solar shield. PLOS Clim 2(2): e0000133. https://doi.org/10.1371/journal.pclm.0000133 Abstract We revisit dust placed near the Earth–Sun L1 Lagrange point as a possible climate-change mitigation measure. Our calculations include variations in grain properties and orbit solutions with lunar and planetary perturbations. To achieve sunlight attenuation of 1.8%, equivalent to about 6 days per year of an obscured Sun, the mass of dust in the scenarios we consider must exceed 1010 kg. The more promising approaches include using high-porosity, fluffy grains to increase the extinction efficiency per unit mass, and launching this material in directed jets from a platform orbiting at L1. A simpler approach is to ballistically eject dust grains from the Moon’s surface on a free trajectory toward L1, providing sun shade for several days or more. Advantages compared to an Earth launch include a ready reservoir of dust on the lunar surface and less kinetic energy required to achieve a sun-shielding orbit. Source: PLOS Climate -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com<mailto:geoengineering+unsubscr...@googlegroups.com>. To view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/CAOyeF5t_XVCNcHvQvjhMMO6xPm-OFLY91eU%3D%2BX62mrq-70QsuQ%40mail.gmail.com<https://groups.google.com/d/msgid/geoengineering/CAOyeF5t_XVCNcHvQvjhMMO6xPm-OFLY91eU%3D%2BX62mrq-70QsuQ%40mail.gmail.com?utm_medium=email&utm_source=footer>. The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. Is e buidheann carthannais a th’ ann an Oilthigh Dhùn Èideann, clàraichte an Alba, àireamh clàraidh SC005336. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/geoengineering/AM8PR05MB8035F0D3B6DFB3206158ABD9A7D99%40AM8PR05MB8035.eurprd05.prod.outlook.com.
