[geo] Re: Less alarmism needed?

2008-09-22 Thread David Schnare
Dear Mike: We have now come to a common point. GHGs need to go down. The policy question remains "how far." The availability of geoengineering of the climate will probably help inform that decision, much to the disgruntlement of some. So, too, will the economic consequences of carbon reducti

[geo] Re: Less alarmism needed?

2008-09-22 Thread Mike MacCracken
Dear David-- On the issue of uncertainties, indeed they exist, but their importance really depends on the question being asked--on the largest questions, things are quite clear; on the smallest scales, departures from the large-scale averages remain somewhat uncertain. [The recent paper by David

[geo] Re: Less alarmism needed?

2008-09-22 Thread David Schnare
Mike: Thanks for your thoughtful response. With regard to the ocean sink, I'm not sure the dynamics of that are quite ready for prime time. After all, the bouy data shows no statistically significant warming at any thermocline, and we should be seeing that by now, according to the IPCC. As for

[geo] Re: Less alarmism needed?

2008-09-22 Thread Mike MacCracken
The Douglass et al paper (so 2007 instead of 2006) I was referring to was: Douglass DH, Christy JR, Pearson BD, Singer SF. 2007. A comparison of tropical temperature trends with model predictions. International Journal of Climatology 27: doi:10.1002/joc.1651. This is a paper also about troposphe

[geo] Re: Euro carbon trading round 2

2008-09-22 Thread Dan Whaley
Interesting... and unfortunate. Clearly the international regulated cap and trade market has an issue w/ corruption-- at the highest levels of government. Over allocation was responsible for the first crash in the CER market in may 2006, and (not so) incredibly, it looks like at least the UK is

[geo] Re: white roofs news story in Science online

2008-09-22 Thread Dan Whaley
Ken's comment at the end strikes near and dear to my heart. Pardon me Do offsets result in more carbon dioxide emissions? In a regulated market, how much carbon one can emit is set by ones allowance. The degree to which one can use offsets from outside the cap to meet targets is a primary