For details see: Akbari, H., Menon, S., and Rosenfeld, A. 2009. Global cooling: increasing world-wide urban albedos to offset CO2 (Download)<https://sites.google.com/a/lbl.gov/cool-white-planet/papers/Akbarietal.GlobalCooling2009.pdf?attredirects=0> . *Climatic Change*, 94, pp. 275-286. doi:10.1007/s10584-008-9515-9
Akbari, H. and Rosenfeld, A. 2008. White roofs cool the world, directly offset CO2 and delay global warming (Download)<https://sites.google.com/a/lbl.gov/cool-white-planet/home/background-materials/documents/WhiteRoofsCoolWorld2pp.doc?attredirects=0> . Heat Island Group at Lawrence Berkeley National Laboratory. *Research Highlight*, Nov 10. Akbari, H., Menon, S., and Rosenfeld, A. 2008. Equivalent CO2 avoided by reflective roofs and pavements in California (Download).<http://coolcolors.lbl.gov/assets/docs/Papers/CaliforniaIsCooling06-2008-08-21_final_.pdf> A memo to Dr. Bart Croes (California Air Resources Board). Revised Oct 21 On Thursday, August 30, 2012 11:34:08 PM UTC-4, Russell Seitz wrote: > > "If you paint a quarter of all London rooftops white, you could > probably reduce heat wave temperatures by 10 degrees centigrade — so > lots of impact at very low cost. Let's think about that," said Danish > author and political scientist Dr Bjørn Lomberg, > > Since roofs constitute <25 % of greater london's area, a look at the > radiative forcing potential of the relevant urban statistics: > > > http://livingroofs.org/20110502300/world-green-roof-policies/history-of-green-roofs-in-london.html > > Suggests Lomborg's estimate is too high by an order of magnitude or more. > > On Monday, August 27, 2012 5:44:51 AM UTC-4, andrewjlockley wrote: >> >> Geo-engineering: fixing climate for just US$6 billion >> Summary: What's the best way to deal with climate change? >> >> Some engineers think that geo-engineering, or re-engineering the >> planet, is a far more cost-effective way of tackling climate change >> than market mechanisms, like emissions trading schemes or Australia's >> carbon tax. >> >> One model suggests that a technique called "cloud brightening" could >> counter all of the 21st century's projected temperature rises, for a >> cost of just US$6 billion. To put that into perspective, that's around >> the price being paid for 24 F/A-18 Super Hornet jet fighters by the >> Royal Australian Air Force. >> >> Whether that model is accurate or not, it's starting to become clear >> that market mechanisms and Kyoto-style negotiations won't be enough. >> >> On this week's Patch Monday podcast, you'll hear from two enthusiasts >> for geo-engineering who spoke at the Centre for Independent Studies' >> recent "Consilium" conference. >> >> "Even if we do reduce carbon emissions drastically, it's going to be a >> very long time before we see any of the effects of that, and it will >> be very costly and slow," said Dr Caspar Hewett, visiting researcher >> at the University of Newcastle in the UK. >> >> "These other techniques that we're talking about are probably going to >> be necessary anyway, even if we do reduce carbon," he said. >> >> The techniques include grand engineering schemes, such as artificial >> volcanoes that inject sulphur particles into the atmosphere to seed >> clouds, and even placing millions of smart mirrors into orbit around >> the earth, like a giant pergola. >> >> But simple, small-scale techniques can also produce significant >> effects, such as planting trees and painting the rooftops of buildings >> white to reflect sunlight. >> >> "If you paint a quarter of all London rooftops white, you could >> probably reduce heat wave temperatures by 10 degrees centigrade — so >> lots of impact at very low cost. Let's think about that," said Danish >> author and political scientist Dr Bjørn Lomberg, director of the >> Copenhagen Consensus Centre in Washington. >> >> Needless to say, these schemes are controversial. Both Hewett and >> Lomberg are calling for large-scale experiments to validate the >> mathematical models. >> > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To view this discussion on the web visit https://groups.google.com/d/msg/geoengineering/-/TVG94EnLDB0J. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
