tag:blogger.com,1999:blog-28837843.post4002254874258593247..comments2024-03-19T07:10:27.303-07:00Comments on Quark Soup by David Appell: This is Pretty FunnyDavid Appellhttp://www.blogger.com/profile/03318269033139447591noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-28837843.post-23540929653030722702013-01-01T09:06:58.447-08:002013-01-01T09:06:58.447-08:00Hansen isn't calling the 10kGT proven reserves...Hansen isn't calling the 10kGT proven reserves as Bob K is conflating. In figure P1. Hansen shows two estimates of reserves around 800GT, and a estimate of "potentially recoverable reserves" of < 10,000G tied to a Coal "Resources" of 440,000 EJoule vs "Reserves" of 12,000 Ej in Hansen's "GAC" cite: German Advisory Council on Global Change (GAC), 2011: World in Transition - A Social Contract for Sustainability.: http://www.wbgu.de/en/flagship-reports/fr-2011-a-social-contract/ accessed Oct 2011. <br /><br />Looks to me like Bob K. is confusing "proven reserves" with "potentially recoverable resources", even though Hansen draws a clear distinction in the figure Bob was "scrutinizing". Rather than Hansen exaggerating, I think that Appell's use of "recoverable coal reserves" has confused Bob.Dave Xhttps://www.blogger.com/profile/07921503998514640850noreply@blogger.comtag:blogger.com,1999:blog-28837843.post-30479341217131174302012-12-25T11:04:10.851-08:002012-12-25T11:04:10.851-08:00I learned long ago to always scrutinize Hansen'...I learned long ago to always scrutinize Hansen's figures. Both wikipedia and BP say proven reserves of coal of all grades amounts to about 861 gigatons. Looks to me like Hansen is exaggerating.<br /><br />BP says:<br />"Proved reserves of coal are generally taken to be those quantities that geological and engineering information<br />indicates with reasonable certainty can be recovered in the future from known deposits under existing economic and operating conditions."<br /><br />You talked carbon, but just in case you meant co2.<br />EIA says:<br />"Because the atomic weight of carbon is 12 and that of oxygen is 16, the atomic weight of carbon dioxide is 44. Based on that ratio, and assuming complete combustion, 1 pound of carbon combines with 2.667 pounds of oxygen to produce 3.667 pounds of carbon dioxide. For example, coal with a carbon content of 78 percent and a heating value of 14,000 Btu per pound emits about 204.3 pounds of carbon dioxide per million Btu when completely burned.(5) Complete combustion of 1 short ton (2,000 pounds) of this coal will generate about 5,720 pounds (2.86 short tons) of carbon dioxide."<br /><br />Not even close to 10,000 gigatons.Bob Khttps://www.blogger.com/profile/11864247983108770885noreply@blogger.com