[geo] Re: Fwd: methane geoengineering

2011-08-08 Thread hiroshi mizutani
Hi Nathan I am not an atmospheric chemist, but have tried a cursory survey on relevant Japanese literature. There are many studies on photocatalytic reactions of various atmospheric gases in the presence of TiO2 coatings; however, I failed to find papers specifically relating them to their

Re: [geo] Re: My AGU abstract: We Don¹t Need a ³Geoengineering² Research Program

2011-08-08 Thread John Gorman
I largely agree with this and i am sure the time has come for number 6 -below 6. If there is to be an overarching coordination of relevant research activities, it could be under the rubric climate change risk management or something like that,- We could call it something like The

[geo] Re: Fwd: methane geoengineering

2011-08-08 Thread Nathan Currier
methane geoengineering and also TiO2 white roof treatments fromRenaud_de_RICHTER ecologi...@gmail.com to hiroshi mizutani mizutani49...@gmail.com, Nathan Currier natcurr...@gmail.com, Andrew Lockley andrew.lock...@gmail.com, Neil Donahue n...@andrew.cmu.edu dateMon, Aug 8, 2011 at

Re: [geo] On whether Arctic Sea Ice, once lost, could recover

2011-08-08 Thread Andrew Lockley
Mike Thanks for informing the debate. However, in 'tipping elements in the earths climate system lenton notes the vulnerability of Greenland and also of cryosphere methane. The fact that sea ice extent appears not to be a tipping element should therefore not be seen as a significant reassurance

Re: [geo] On whether Arctic Sea Ice, once lost, could recover

2011-08-08 Thread Mike MacCracken
Andrew‹I agree that there are tipping points for Greenland and likely for permafrost thawing and did not mean to imply there might not be. But for Arctic ice (and perhaps for mountain glaciers in the region) there does not seem to be in the range that was covered, so a few degrees warmer back to

[geo] Important paper on potential CDR / SRM interactions

2011-08-08 Thread Andrew Lockley
Hi Please see below abstract of http://www.nature.com/nature/journal/vaop/ncurrent/full/nature10310.html, which suggests reduced precip and increased Aeolian dust as the main amplification mechanism for the Milankovitch cycle. If correct, this relationship suggests that there could be a

RE: [geo] Important paper on potential CDR / SRM interactions

2011-08-08 Thread Rau, Greg
With all due respect to Martin, I'm very sceptical the iron fueled marine biology was a major player in G-I air CO2 fluctuations, but at $32/reprint, can anyone freely supply me with the evidence? Thanks, Greg From: geoengineering@googlegroups.com