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8/3/2019 Geoeng Presentation Final
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(Robock 2008)
Geoengineering From Space: Is it the best solution?
Presented by: Axel Bergman
International Space University
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International Space University Axel Bergman March 2009
Definition
• Geoengineering is a deliberate,planetary scale environmentalengineering to counter act theeffects of global warming.
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International Space University Axel Bergman March 2009
Why so controversial?..
• Historical context: Started with USSR inthe mid 1930’s Leningrad Institute of Rainmaking
• Cold war race to control weather• Term was first used to describe dumping
industrial waste deep in the deep oceanduring the mid 1970’s
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International Space University Axel Bergman March 2009
Anthropogenic Climate Modification
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International Space University Axel Bergman March 2009
Sun Shades in Space
L1 point
Sun Shades
Navigation
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International Space University Axel Bergman March 2009
Solar Power Satellites
Ground Rectenna 4 to 10Km radius
Panels about 10km 2
Ionosphere
Pilot Signal Transmitter
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International Space University Axel Bergman March 2009
Sasaki’s Model
(Sasaki, 2006)
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International Space University Axel Bergman March 2009
How to build it
(Sasaki, 2006)
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International Space University Axel Bergman March 2009
The Incredible Economics
• Cost of climate change: $2.5 B/yearfor US
• Stern Report: Economies shrink by26%• Injecting reflective particles: $1 B/year
– Amounts to pennies per ton of CO 2
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International Space University Axel Bergman March 2009
Ranking Scheme
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International Space University Axel Bergman March 2009
So what about Satellites?
• It all depends on cheap and
reliable access to space• Currently only 10 times too
expensive
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International Space University Axel Bergman March 2009
Ethics of geoengineering
• Would it undermine carbon abatement?• Who decides?
• What are the unintended impacts?• How much compensation are we willing to
invest?
• Space solutions are attractive in that theycircumvent many of these issues
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International Space University Axel Bergman March 2009
Summary
• We are starting to understand the problemand the danger..not too late to act.
• Failure of abatement strategies are forcingus to pull out geoengineering back out ofthe closet
• Space Solutions represent an incredibleupfront investment but present salientadvantages
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END
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Figure taken from:SPARC 2006 Assessment of stratospheric aerosol properties (ASAP).Technical report WCRP-124/WMO/TD-No. 1295/SPARC report no. 4, SPARC, Toronto, Ontario,CA, pp. 322.International Space
University Axel Bergman March 2009
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Sasaki 2006International SpaceUniversity Axel Bergman March 2009
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Boyd (Nature) 2008International SpaceUniversity Axel Bergman March 2009
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International SpaceUniversity Axel Bergman March 2009
