OK let's assume that 30,000ppm CO2 would do it. So at 2.12 GT C per ppm CO2, we'd need 60,000 GT of C or 6*44/12 = 220,000 GT CO2. Recoverable fossil fuels might be 5,000 GT C or 18,000 GT CO2, so that's not going to do it. On the other hand, the ocean contains 37,000 GT C or 136,000 GT CO2, so that would get you more than half way there (interesting because evaporating the ocean would cause half its C to degas as CO2 and half to precipitate as carbonates). Guess we'd have to liberate the rest from the 60MT C carbonate mineral pool. Andrew's idea of using non-CO2 GHGs would seem simpler (to the hypothetical Dr. Evil).
Greg ________________________________ From: geoengineering@googlegroups.com [geoengineering@googlegroups.com] on behalf of David Lewis [jrandomwin...@gmail.com] Sent: Sunday, September 28, 2014 9:21 AM To: geoengineering@googlegroups.com Subject: [geo] Re: Dr Evil Goldblatt said in 2013: "our estimate is that it would take 30,000 ppm CO2 in the atmosphere to make it warm enough to trigger this runaway greenhouse", i.e. boil the oceans away. He said this was a finding in the Goldblatt et.al. Low simulated radiation limit for runaway greenhouse climates<http://www.nature.com/ngeo/journal/v6/n8/full/ngeo1892.html> paper published at that time. He was quoted<http://www.nbcnews.com/science/science-news/runaway-greenhouse-easier-trigger-earth-thought-study-says-f6C10761164> in an NBC interview, saying this "really seems quite unlikely". Would 30,000 ppm seem unlikely to Dr. Evil? The man had a base on the Moon. Is ISIS just Dr. Evil diverting our attention from his extraterrestrial carbon import program? On Saturday, September 27, 2014 5:48:55 PM UTC-7, andrewjlockley wrote: If Dr Evil wanted to destroy the world with geoengineering, how easy would it be? How much super greenhouse gas would have to be released to boil the oceans? How much SRM would be needed to snowball the Earth? -- 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 post to this group, send email to geoengineering@googlegroups.com<mailto:geoengineering@googlegroups.com>. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. -- 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 post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
