List of proposed geoengineering schemes

This is a list of notable geoengineering schemes proposed in scientific journals.

Solar radiation management, cloud modification

Solar radiation management^[1][2][3]

Atmospheric projects

General proposals^[4]

• Reflective aerosols or (atmospheric) dust^[5][6][7]
• Reflective engineered nanoparticles^[8]
• Stratospheric sulfur aerosols^{[9][10][11][12]}
• Marine cloud brightening^{[13][14][15][16][17][18][19][20]}
• Ocean sulfur cycle enhancement^{[12][21][22][23]}
• Ocean mixing^[24][25]
• Reflective balloons^[26][27][28]
• Modified ship /aircraft exhaust composition^[29]
• Stratospheric Particle Injection for Climate Engineering

Terrestrial albedo modification

• Cool roof^[30]
• Reflective plastic sheeting covering desert^[31][32] and glaciers^[33]
• Building thicker sea ice^[34][35]

Land management / Bio-geoengineering

• Tropical reforestation^[36]
• Grassland modification^[37]
• High-albedo crops.^[38][39]

Ocean schemes

• Oceanic foams^[40]
• Ocean hydrosols^[41]
• Bering Sea dam^[42][43]
• Barriers to seawater exchange in front of shelf ice ^[44]

Space projects

• Space sunshade^[45]
• Mining moon dust^[46][47][48] or asteroids.^[49]
• Diffraction grating or lens in space, (L1 point)^[50][51][52]
• Lunar spectrum shifting – to accelerate chlorophyll metabolic clocks^[53]

Greenhouse gas remediation

Carbon sequestration

Biological processes

• Ocean iron fertilization^{[54][55][56][57]}
• Ocean urea fertilisation^[58]
• Reforestation^[59]
• Peat production^[60]
• Ocean mixing^{[24][25][61][62][63][64]}
  • HadCM3, a coupled atmosphere-ocean general circulation model

Physical processes

• Biochar burial^[65][66][67]
• Bio-energy with carbon storage^[68][69][70]
• Burying biomass^[71][72]
• Biomass ocean storage^[73][74]
• Carbon capture and storage^[75][76][77]

Chemical techniques

• Mineral carbonation / mineral sequestration.^{[78][79][78][80][81]}
• Carbon negative cement^[82][83][84]
• Oil shale ash^[85]
• Carbon air capture^{[86][86][87][88][89][90]}
• Ocean acid neutralisation^{[91][92][93][94][95][96][97]}
• Ocean hydrochloric acid removal^[98]

Other greenhouse gas remediation

• CFC laser photochemistry^[99]

Other schemes

• Ocean heat transport^[100]
• Methane remediation ^{[101][102][103]}

See also

• Jeff Goodell's 2010 How to Cool the Planet: Geoengineering and the Audacious Quest to Fix Earth’s Climate ("Can We 'Cool the Planet' through Geoengineering?")
• List of geoengineering topics

References

1. Hoyle, F., 1957: The Black Cloud, Harper and Brothers, New York.
2. Kahle, A. B., and D. Deirmendjian, 1973: The black cloud experiment, Rand Corporation report R-1263-ARPA, Santa Monica CA.
3. Teller, E.; Hyde, T.; Wood, L. (2002). "Active Climate Stabilization: Practical Physics-Based Approaches to Prevention of Climate Change" (PDF). Lawrence Livermore National Laboratory. Retrieved 21 April 2008.
4. Harshvardhan (June 1978). "Albedo enhancement and perturbation of radiation balance due to stratospheric aerosols". Unknown. Bibcode:1978aepr.rept.....H. 1978aepr.rept.....H.
5. Budyko, M. I., Climate Changes, American Geophysical Union, Washington, DC, English translation of 1974 Russian volume, 1977, p. 244
6. National Academy of Sciences, Policy implications of greenhouse warming: Mitigation, adaptation and the science base. National Academy Press, Washington DC, 1992, pp. 433–464.
7. Problems with geo-engineering schemes to combat climate change, G. Bala, CURRENT SCIENCE, VOL. 96, NO. 1, 10 January 2009
8. Keith, David W.: Photophoretic levitation of engineered aerosols for geoengineering, PNAS, published 07. September 2010
9. Crutzen, Paul J. (2006). "Albedo enhancement by stratospheric sulfur injections: A contribution to resolve a policy dilemma?" (PDF). Climatic Change 77 (3–4): 211–219. doi:10.1007/s10584-006-9101-y.
10. "Can a Million Tons of Sulfur Dioxide Combat Climate Change?". Wired. 23 June 2008.
11. Paul Crutzen, "Albedo enhancement by stratospheric sulfur injections: a contribution to resolve a policy dilemma?" Journal of Climatic Change, vol. 77, no. 3-4, August 2006
12. "Bates et al. – Sulfur Emissions to the Atmosphere from Natural Sources". Pmel.noaa.gov. Retrieved 8 May 2012.
13. Latham, J. (1990). "Control of global warming" (PDF). Nature 347 (6291): 339–340. Bibcode:1990Natur.347..339L. doi:10.1038/347339b0.
14. Latham, J.; Salter, S. "Preventing global warming by increasing cloud albedo" (PDF). Retrieved 20 April 2008. (A brief handout, with artist's renderings.)
15. Keith Bower et al., "Assessment of a Proposed Technique for Global Warming Mitigation via Albedo-Enhancement of Marine Stratocumulus Clouds", Atmospheric Research, vol. 82, no. 1-2, pp. 328–336
16. Latham, J. (2002). "Amelioration of global warming by controlled enhancement of the albedo and longevity of low-level maritime clouds" (PDF). Atmos. Sci. Lett. 3 (2–4): 52–58. Bibcode:2002AtScL...3...52L. doi:10.1006/asle.2002.0099.
17. Salter, S, G. Sortino & J. Latham, (2008). Sea-going hardware for the cloud albedo method of reversing global warming, Phil. Trans. R. Soc. A, doi:10.1098/rsta.2008.0136
18. Latham, J. 1990 Control of global warming? Nature 347, 339–340.
19. Latham, J., Philip .J. Rasch, C.C.Chen, L. Kettles, A. Gadian, A. Gettelman, H. Morrison, K. Bower., 2008. Global Temperature Stabilization via Controlled Albedo Enhancement of Low-level Maritime Clouds. Phil. Trans. Roy. Soc. A, doi:10.1098/rsta.2008.0137
20. Reference. J. Latham, P.J. Rasch, C.C.Chen, L. Kettles, A. Gadian, A. Gettelman, H. Morrison, K. Bower, T.W.Choularton., Global Temperature Stabilization via Controlled Albedo Enhancement of Low-level Maritime Clouds. 2008. Phil. Trans. Roy. Soc. A, 366, 3969?3987, doi:10.1098/rsta.2008.0137
21. Atmospheric Environment 41 (2007) 7373–7375
22. Oliver W. Wingenter. "Slowing Global Warming by Enhancing the Natural Sulfur Cycle". Climos.com. Retrieved 8 May 2012.
23. Coale, K. H.; Johnson, K. S.; Buesseler, K.; Sofex Group, . (2002). "SOFeX: Southern Ocean Iron Experiments. Overview and Experimental Design". American Geophysical Union 22: 01. Bibcode:2002AGUFMOS22D..01C.
24. "Microsoft Word - 9-5 ETCC.doc" (PDF). Retrieved 8 May 2012.
25. http://www.cosis.net/abstracts/EGU2008/10885/EGU2008-A-10885.pdf
26. "Policy Implications of Greenhouse Warming: Mitigation, Adaptation, and the Science Base". Books.nap.edu. Retrieved 8 May 2012.
27. Teller et al, 1997
28. "IPCC Third Assessment Report – Climate Change 2001 – Complete online versions | UNEP/GRID-Arendal – Publications – Other". Grida.no. Retrieved 8 May 2012.
29. Archived 8 March 2009 at the Wayback Machine.
30. Hashem Akbari et al., "Global Cooling: Increasing World-wide Urban Albedos to Offset CO2", draft paper. Available online at: http://www.energy.ca.gov/2008publications/CEC-999-2008-020/CEC-999-2008-020.PDF
31. Alvia Gaskill, "Desert Area Coverage", Global Albedo Enhancement Project. Available online at: http://www.global-warming-geo-engineering.org/Albedo-Enhancement/Surface-Albedo-Enhancement/Calculation-of-Coverage-Areas-to-Achieve-Desired-Level-of-ForcingOffsets/Desert-Area-Coverage/ag28.html
32. "Global Albedo Enhancement Project: Surface Albedo Enhancement Principle". Global-warming-geo-engineering.org. Retrieved 8 May 2012.
33. M. Olefs and A.Fischer. "Comparative study of technical measures to reduce snow and ice ablation in Alpine glacier ski resorts". in "Cold Regions Science and Technology, 2007". Retrieved 6 September 2009.
34. Watts, Robert G. (1997). "Cryospheric processes". Engineering Response to Global Climate Change: Planning a Research and Development Agenda (Digitized online by Googlebooks). CRC Press. p. 419. ISBN 9781566702348. Retrieved 2 January 2009.
35. "Duct Tape Methods to Save the Earth: Re-Ice the Arctic". Popular Science. Retrieved 4 March 2009.
36. "Climate_effects_of_deforestation" (PDF). Retrieved 8 May 2012.
37. Hamwey (2006). "Active Amplification of the Terrestrial Albedo to Mitigate Climate Change: An Exploratory Study". Mitigation and Adaptation Strategies for Global Change 12 (4): 419. arXiv:physics/0512170. doi:10.1007/s11027-005-9024-3.
38. "A high-albedo diet will chill the planet – environment – 15 January 2009". New Scientist. Retrieved 8 May 2012.
39. Ridgwell et al., Tackling Regional Climate Change By Leaf Albedo Bio-geoengineering, Current Biology (2009), doi:10.1016/j.cub.2008.12.025
40. Evans, J.; Stride, E.; Edirisinghe, M.; Andrews, D.; Simons, R. (2010). "Can oceanic foams limit global warming?". Climate Research 42 (2): 155–160. doi:10.3354/cr00885.
41. Seitz, R. (2010). "Bright water: Hydrosols, water conservation and climate change". Climatic Change 105 (3–4): 365–381. doi:10.1007/s10584-010-9965-8.
42. Schuttenhelm, Rolf (2008). "Diomede Crossroads – Saving the North Pole? Thoughts on plausibility".
43. "Could a Massive Dam Between Alaska and Russia Save the Arctic?". Huffington Post. 27 November 2010. Retrieved 10 March 2011.
44. "Antarktis: Der Schutzschild bricht auf]]" (in German). 2016-02-17. Retrieved 2016-04-02.
45. David W. Keith, "Geoengineering the climate: History and Prospect", Annual Review of Energy and the Environment, Vol. 25, 2000, pp. 245–284, doi:10.1146/annurev.energy.25.1.245
46. Journal of the British Interplanetary Society, vol 60, p 1
47. Roger Angel and S. Pete Worden, "Making Sun-Shades from Moon Dust", National Space Society, Ad Astra, vol. 18, no. 1, Summer 2006. Available online at: http://www.nss.org/adastra/volume18/angel.html
48. LiveScience, Space Ring Could Shade Earth and Stop Global Warming
49. Bewick, R.; Sanchez, J. P.; McInnes, C. R. (2012). "Gravitationally bound geoengineering dust shade at the inner Lagrange point". Advances in Space Research 50 (10): 1405. Bibcode:2012AdSpR..50.1405B. doi:10.1016/j.asr.2012.07.008.
50. See footnote 23 in E. Teller, L. Wood, and R. Hyde (1997) "Global Warming and Ice Ages: Prospects for Physics-Based Modulation of Global Change".
51. E. Teller, L. Wood, and R. Hyde (1997) "Global Warming and Ice Ages: Prospects for Physics-Based Modulation of Global Change".
52. See Russell Dovey, "Supervillainy: Astroengineering Global Warming" and Bill Christensen, "Reduce Global Warming by Blocking Sunlight".
53. http://www.countercurrents.org/cc-scheff271005.htm
54. "BG – Abstract – The impact on atmospheric CO2 of iron fertilization induced changes in the ocean's biological pump". Biogeosciences.net. 4 July 2010. Retrieved 8 May 2012.
55. "No Title". Formal.stanford.edu. Retrieved 8 May 2012.
56. Planktos, http://www.planktos-science.com/
57. "Cold Carbon Sink: Slowing Global Warming with Antarctic Iron – SPIEGEL ONLINE". Der Spiegel. 18 December 2008. Retrieved 8 May 2012.
58. Anna Salleh (9 November 2007). "Urea 'climate solution' may backfire " Analysis (ABC Science)". Australia: ABC. Retrieved 8 May 2012.
59. McDermott, Mat (22 August 2008). "Can Aerial Reforestation Help Slow Climate Change? Discovery Project Earth Examines Re-Engineering the Planet's Possibilities". TreeHugger. Retrieved 8 May 2012.
60. http://www.newscientist.com/article/mg19826542.400-burying-biomass-to-fight-climate-change.html?full=true
61. Lovelock, J. E. and Rapley, C. G.: Ocean pipes could help the earth to cure itself, Nature, 449, p. 403, 2007
62. "Ocean pumps could counter global warming – environment – 26 September 2007". New Scientist. Retrieved 8 May 2012.
63. James E. Lovelock and Chris G. Rapley, "Ocean pipes could help the earth to cure itself", Nature vol. 449, no. 7161, 27 September 2007, p. 403, doi:10.1038/449403a
64. http://www.biogeosciences-discuss.net/6/1/2009/bgd-6-1-2009-print.pdf
65. Lehmann, J., Gaunt, J., and Rondon, M.: Bio-char sequestration in terrestrial ecosystems – a review, Mitigation and Adaptation Strategies for Global Change, 11, 403–427, 2006
66. "International Biochar Initiative | International Biochar Initiative". Biochar-international.org. Retrieved 8 May 2012.
67. http://www.newscientist.com/article/mg20126921.500-one-last-chance-to-save-mankind.html?full=true
68. Fisher, B.S.; et al. (2007). "Issues related to mitigation in the long term context, In Climate Change 2007: Mitigation. Contribution of Working Group III to the Fourth Assessment Report of the Inter-governmental Panel on Climate Change" (PDF). Fourth Assessment Report of the Inter-governmental Panel on Climate Change. Cambridge University Press.
69. Obersteiner, M., Ch. Azar, P. Kauppi, K. Möllersten, J. Moreira, S.Nilsson, P. Read, K. Riahi, B. Schlamadinger, Y. Yamagata, J. Yan, and J.-P. van Ypersele, 2001: Managing climate risk, Science 294, 786–787.
70. Christian Azar et al., "Carbon Capture and Storage From Fossil Fuels and Biomass – Costs and Potential Role in Stabilizing the Atmosphere", Climatic Change, vol. 74, no. 1-3, January 2006, pp. 47–79
71. "Carbon Balance and Management | Full text | Carbon sequestration via wood burial". Cbmjournal.com. Retrieved 8 May 2012.
72. http://www.newscientist.com/article/mg19826542.400
73. "Ocean Sequestration of Crop Residue Carbon: Recycling Fossil Fuel Carbon Back to Deep Sediments – Environmental Science & Technology (ACS Publications)". Pubs.acs.org. Retrieved 8 May 2012.
74. Strand, S. E.; Benford, G. (2009). "Ocean Sequestration of Crop Residue Carbon: Recycling Fossil Fuel Carbon Back to Deep Sediments". Environmental Science & Technology 43 (4): 1000. doi:10.1021/es8015556.
75. "Weyburn-Midale CO2 Project, World's first CO2 measuring, monitoring and verification initiative". Petroleum Technology Research Centre. Retrieved 9 April 2009.
76. Squaring the circle – carbon capture and storage – Chris Hodrien – Claverton Energy Conference, Bath, 2008
77. "Subscription Verification". Dailyoilbulletin.com. Retrieved 8 May 2012.
78. Herzog, Howard (14 March 2002). "Carbon Sequestration via Mineral Carbonation: Overview and Assessment" (PDF). Massachusetts Institute of Technology. Retrieved 5 March 2009.
79. Goldberg, Philip; Zhong-Ying Chen; O'Connor, William; Walters, Richard; Ziock Hans (1998). "CO₂ Mineral Sequestration Studies in US" (PDF). National Energy Technology Laboratory. Retrieved 6 March 2009. Cite uses deprecated parameter |coauthors= (help)
80. Peter B. Kelemen1 and Jürg Matter (3 November 2008). "In situ carbonation of peridotite for CO2 storage". Pnas.org. Retrieved 8 May 2012.
81. "Scientists say a rock can soak up carbon dioxide". Reuters. 7 November 2008.
82. "Novacem". Imperial Innovations. 6 May 2008. Retrieved 8 May 2012.
83. Jha, Alok (31 December 2008). "Revealed: The cement that eats carbon dioxide". The Guardian (London). Retrieved 8 May 2010.
84. "Home". TecEco. 1 July 1983. Retrieved 8 May 2012.
85. Uibu, Mai; Uus, Mati; Kuusik, Rein (February 2008). "CO2 mineral sequestration in oil-shale wastes from Estonian power production". Journal of Environmental Management (Elsevier) 90 (2): 1253–1260. doi:10.1016/j.jenvman.2008.07.012. PMID 18793821. Retrieved 5 March 2009.
86. Chang, Kenneth (19 February 2008). "Scientists Would Turn Greenhouse Gas Into Gasoline". The New York Times. Retrieved 8 May 2010.
87. An Error Occurred Setting Your User Cookie
88. "Chemical 'sponge' could filter CO2 from the air – environment – 03 October 2007". New Scientist. Retrieved 8 May 2012.
89. "New Device Vacuums Away Carbon Dioxide". LiveScience. 11 January 2008. Retrieved 8 May 2012.
90. Adam, David (31 May 2008). "Could US scientist's 'CO2 catcher' help to slow warming?". The Guardian (London). Retrieved 8 May 2010.
91. Harvey, L. D. D.: Mitigating the atmospheric CO2 increase and ocean acidification by adding limestone powder to upwelling regions, J. Geophys. Res.-Oceans, 113, C04028, doi:10.1029/2007JC004373, 2008.
92. House, K.Z., House, C.H, Schrag, D.P., Aziz, M.J. Electrochemical acceleration of chemical weathering as an energetically feasible approach to mitigating anthropogenic climate change. Environ. Sci. Technol., 41(24): 8464–8470, 2007.
93. Kheshgi, H. S., 1995. Sequestering atmospheric carbon dioxide by increasing ocean alkalinity. Energy, 20: 915–922.
94. Lackner et al., 1995 K.S. Lackner, C.H. Wendt, D.P. Butt, E.L. Joyce and D.H. Sharp, Carbon dioxide disposal in carbonate minerals, Energy 20 (1995) (11), pp. 1153–1170.
95. Lackner et al., 1997 K.S. Lackner, D.P. Butt and C.H. Wendt, Progress on binding CO2 in mineral substrates, Energy Conversion and Management 38 (1997), pp. S259–S264
96. Rau, G.H., and Caldeira, K. Enhanced carbonate dissolution: A means of sequestering waste CO2 as ocean bicarbonate. Energy Conversion and Management 40, 1803–1813, 1999.
97. Rau, G.H., K.G. Knauss, W.H. Langer AND K. Caldeira. 2007. Reducing energy-related CO2 emissions using accelerated weathering of limestone. Energy, 32:1471–1477.
98. "Ocean CO2 collector could fight global warming and ocean acification". News.mongabay.com. Retrieved 8 May 2012.
99. "IEEE Xplore – Abstract Page". Ieeexplore.ieee.org. doi:10.1109/PLASMA.1993.593398. Retrieved 8 May 2012.
100. Zhou, S. .; Flynn, P. C. (2005). "Geoengineering Downwelling Ocean Currents: A Cost Assessment". Climatic Change 71: 203. doi:10.1007/s10584-005-5933-0.
101. Stolaroff, J. K.; Bhattacharyya, S.; Smith, C. A.; Bourcier, W. L.; Cameron-Smith, P. J.; Aines, R. D. (2012). "Review of Methane Mitigation Technologies with Application to Rapid Release of Methane from the Arctic". Environmental Science & Technology 46 (12): 6455. doi:10.1021/es204686w.
102. Lockley, A. (2012). "Comment on "Review of Methane Mitigation Technologies with Application to Rapid Release of Methane from the Arctic"". Environmental Science & Technology 46 (24): 13552–13553. doi:10.1021/es303074j.
103. http://www.atm.helsinki.fi/FAAR/reportseries/rs-109/abstracts/Luxi%20Zhou.pdf