Comments on: Cold Facts on Global Warming http://globalwarming-factorfiction.com/2007/05/05/cold-facts-on-global-warming/ Dedicated to the balanced discussion of global warming Sun, 04 Dec 2011 14:02:31 -0700 http://wordpress.org/?v=2.8.6 hourly 1 By: Marcus http://globalwarming-factorfiction.com/2007/05/05/cold-facts-on-global-warming/comment-page-1/#comment-93 Marcus Tue, 15 May 2007 19:15:40 +0000 http://globalwarming-factorfiction.com/2007/05/05/cold-facts-on-global-warming/#comment-93 Mistake #1: "most sources place it between 90 and 95%": http://www.realclimate.org/index.php/archives/2005/04/water-vapour-feedback-or-forcing/ And other calculations show that water vapor plus clouds is 66% to 85%. Mistake #2: Assuming that there isn't a feedback between GHG forcing and water vapor levels. Doubling CO2 levels has a direct temperature effect that is on the order of a degree centigrade, but this leads to increased water vapor and more glacier/polar ice retreat, which leads to further warming. In an interesting thought experiment, if we removed _all_ the CO2 and CH4 from the atmosphere, we would see a nasty feedback. That removal would probably lead to enough cooling to see a return to Snowball Earth, with total loss of water vapor and total global coverage by ice. Temperatures would drop below 255 K (255 K assumes current albedo). So, in a way, we can attribute >100% of our current 33 degrees C temperature increase above 255 to CO2. Mistake #1: “most sources place it between 90 and 95%”:

http://www.realclimate.org/index.php/archives/2005/04/water-vapour-feedback-or-forcing/

And other calculations show that water vapor plus clouds is 66% to 85%.

Mistake #2: Assuming that there isn’t a feedback between GHG forcing and water vapor levels. Doubling CO2 levels has a direct temperature effect that is on the order of a degree centigrade, but this leads to increased water vapor and more glacier/polar ice retreat, which leads to further warming.

In an interesting thought experiment, if we removed _all_ the CO2 and CH4 from the atmosphere, we would see a nasty feedback. That removal would probably lead to enough cooling to see a return to Snowball Earth, with total loss of water vapor and total global coverage by ice. Temperatures would drop below 255 K (255 K assumes current albedo). So, in a way, we can attribute >100% of our current 33 degrees C temperature increase above 255 to CO2.

]]> By: soshaughnessey http://globalwarming-factorfiction.com/2007/05/05/cold-facts-on-global-warming/comment-page-1/#comment-66 soshaughnessey Mon, 07 May 2007 01:11:51 +0000 http://globalwarming-factorfiction.com/2007/05/05/cold-facts-on-global-warming/#comment-66 Thank you very much! Thank you very much!

]]> By: Scott http://globalwarming-factorfiction.com/2007/05/05/cold-facts-on-global-warming/comment-page-1/#comment-65 Scott Sun, 06 May 2007 15:27:18 +0000 http://globalwarming-factorfiction.com/2007/05/05/cold-facts-on-global-warming/#comment-65 Hey there! I've nominated you for the Thinking Blogger Award. Don't know if it's as important as it tries to sound... But what the hey, your blog is the only one that makes me stop to consider the pro-anthropogenic and pro-global warming and pro-precuationary principle side of things. http://scottthong.wordpress.com/2007/05/06/thinking-blogger-award/ Hey there! I’ve nominated you for the Thinking Blogger Award. Don’t know if it’s as important as it tries to sound… But what the hey, your blog is the only one that makes me stop to consider the pro-anthropogenic and pro-global warming and pro-precuationary principle side of things.

http://scottthong.wordpress.com/2007/05/06/thinking-blogger-award/

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