For the equivalent of doubling the current atmospheric CO2 concentration, you'd need ~120 Mt of SF6. That is about 1/4 of the U.S. annual commodity chemical production (500 Mt in 2000).
-Josh ________________________________ From: [email protected] [[email protected]] on behalf of Andrew Lockley [[email protected]] Sent: Sunday, September 28, 2014 10:10 AM To: David Lewis Cc: geoengineering Subject: Re: [geo] Re: Dr Evil But to get an equivalent amount of warming with CFCs or similar would actually be quite practical, I think. It could potentially be weaponised quite easily. It would probably be quite easy to conceal the necessary volumes of SF6 or similar, eg in old salt mines. It would even possibly be within our technology horizon to make a spaceship that could crawl slowly to another planet and crash land that kind of volume of chemicals into their atmosphere. Basically a crude geoengineering version of the death star. A On 28 Sep 2014 17:22, "David Lewis" <[email protected]<mailto:[email protected]>> wrote: 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<http://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 [email protected]<mailto:[email protected]>. To post to this group, send email to [email protected]<mailto:[email protected]>. 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 [email protected]<mailto:[email protected]>. To post to this group, send email to [email protected]<mailto:[email protected]>. 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
