Comments on: IPCC Scientist: A “Vicious Cycle” of Carbon Spikes http://blogs.kqed.org/climatewatch/2009/02/14/ipcc-scientist-a-vicious-cycle-of-carbon-spikes/ KQED's multimedia series providing in-depth coverage of climate-related science and policy issues from a California perspective. Fri, 10 Feb 2012 18:35:00 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Craig Miller http://blogs.kqed.org/climatewatch/2009/02/14/ipcc-scientist-a-vicious-cycle-of-carbon-spikes/comment-page-1/#comment-626 Craig Miller Wed, 18 Feb 2009 21:10:56 +0000 http://blogs.kqed.org/climatewatch/?p=301#comment-626 Point(s) taken. This kind of detail was a bit sparse in the original information we got from Stanford. Field's talk at the AAAS annual meeting did not appear to be a presentation of a specific paper, as such, though he cites several papers in it. His talk was entitled: "What is New and Surprising Since the IPCC 4th Assessment?" Two of his own papers he cites include: - "Changing Feedbacks in the Climate-Biosphere System," co-authored with four others (www.frontiersinecology.org), and - "Feedbacks of Terrestrial Systems to Climate Change," co-authored with three others (arjournals.annualreviews.org) We've asked for a link to his PowerPoint when it's available. In the meantime, this citation may also be relevant: Recent research suggests that, for a given concentration of GHGs in the atmosphere, the temperature will rise higher than previously anticipated. The 2007 report of the IPCC, for example, reported that, if carbon dioxide concentrations were to stabilize in the range of 350 to 400 ppm, warming likely would stabilize within the range of 2°C to 2.4°C (3.6°F to 4.3°F), but it warned that larger temperature increases might occur. Research not represented in the IPCC report looks more directly at the possibility that temperatures will increase faster than expected. The authors of one recent paper find that, if carbon dioxide concentrations stabilize at 450 ppm (or higher) there is a substantial probability that the increase in temperature will rise to 6°C (10.8°F).* *Hansen, J., et al. 2008. “Target Atmospheric CO2: Where Should Humanity Aim?” (www.columbia.edu/~jeh1/2008/TargetCO2_ 20080407.pdf) Point(s) taken. This kind of detail was a bit sparse in the original information we got from Stanford. Field’s talk at the AAAS annual meeting did not appear to be a presentation of a specific paper, as such, though he cites several papers in it.
His talk was entitled: “What is New and Surprising Since the IPCC 4th Assessment?” Two of his own papers he cites include:
- “Changing Feedbacks in the Climate-Biosphere System,” co-authored with four others (www.frontiersinecology.org), and
- “Feedbacks of Terrestrial Systems to Climate Change,” co-authored with three others (arjournals.annualreviews.org)

We’ve asked for a link to his PowerPoint when it’s available. In the meantime, this citation may also be relevant:

Recent research suggests that, for a given concentration of GHGs in the atmosphere, the temperature will rise higher than previously anticipated. The 2007 report of the IPCC, for example, reported that, if carbon dioxide concentrations were to stabilize in the range of 350 to 400 ppm, warming likely would stabilize within the range of 2°C to 2.4°C (3.6°F to 4.3°F), but it warned that larger temperature increases might occur. Research not represented in the IPCC report looks more directly at the possibility that temperatures will increase faster than expected. The authors of one recent paper find that, if carbon dioxide concentrations stabilize at 450 ppm (or higher) there is a substantial probability that the increase in temperature will rise to 6°C (10.8°F).*

*Hansen, J., et al. 2008. “Target Atmospheric CO2: Where Should Humanity Aim?” (www.columbia.edu/~jeh1/2008/TargetCO2_ 20080407.pdf)

]]> By: David http://blogs.kqed.org/climatewatch/2009/02/14/ipcc-scientist-a-vicious-cycle-of-carbon-spikes/comment-page-1/#comment-624 David Tue, 17 Feb 2009 00:34:05 +0000 http://blogs.kqed.org/climatewatch/?p=301#comment-624 Plus there are 4 reports. Which one do I read if I want this info? Plus there are 4 reports. Which one do I read if I want this info?

]]> By: David http://blogs.kqed.org/climatewatch/2009/02/14/ipcc-scientist-a-vicious-cycle-of-carbon-spikes/comment-page-1/#comment-623 David Tue, 17 Feb 2009 00:33:08 +0000 http://blogs.kqed.org/climatewatch/?p=301#comment-623 This is interesting news but it is not specific at all. So how many degrees is this guy predicting by when? This is interesting news but it is not specific at all. So how many degrees is this guy predicting by when?

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