Robert and ccs 1. Thanks for the added links and information. Not yet mentioned on this list is that your APS panel changed (added?) only one footnote (#18) - and as near as I can tell - changed no conclusions. Still projecting $600/tonCO2, it seems.
2. As you may have noticed there has been some discussion this list on how we (Society) should be evaluating climate technologies. I do think that groups such as the APS have done and can do a great public service with studies of the type you have performed here (but I know too little of the topic to know if your panel or Keith should be given the higher believability rating). I thank you for taking on a thankless task. Two questions for you, based on my concerns (as at what may happen in Lima, for instance) a. Do you feel that the air capture experts were given adequate time to present to your panel - or might you now do something different procedurally? b. Are you aware of any other similar (highly technical, multiple and presumably un-biased panelists) technology assessment in the works (by professional societies or anyone) for any of the other field(s) of geoengineering? 3 Your proposal with Prof Pacala to use the simplified concept of seven wedges reaching 1 Gt C each in 50 years time (and 25 Gt C each avoided) has been very helpful (unfortunately not yet very well followed). Several questions on that as related to the interests of this list: a. Since we all (?) are trying to get into carbon negative territory ASAP, can you comment on having each wedge grow twice as rapidly so as to get to zero fossil carbon by 2060. This being even longer than Jim Hansen desires, of course - so can you endorse an even shorter growth period for the (roughly seven? or do we need 14 now?) wedges. b. Have you given thought as to what a similar carbon negative wedge split should be on the CDR side? How much BECCS, air capture, ocean deposition. tree planting, Biochar, etc? Does the wedge concept still work as well? At what time point in the 50 year history for the "traditional" Pacala-Socolow wedge growth would you recommend starting the CDR wedges? Soon? c. Is there a way that the SRM technologies fit into a wedge description? Thanks in advance. Ron ----- Original Message ----- From: "Robert Socolow" <[email protected]> To: [email protected], [email protected] Cc: [email protected] Sent: Monday, June 20, 2011 8:33:12 PM Subject: RE: [geo] Cost of Air Capture and the APS report Ron and others: I attach .pdfs for the report (revised) and the press release. The links are: Report: http://www.aps.org/policy/reports/popa-reports/loader.cfm?csModule=security/getfile&PageID=244407 . Press release: http://www.aps.org/about/pressreleases/dac11.cfm The links have not been changed. Rob Socolow From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, June 20, 2011 8:08 PM To: [email protected] Cc: [email protected] Subject: Re: [geo] Cost of Air Capture and the APS report David - Can you provide a link to the revised APS report? (I failed.) Thanks Ron ----- Original Message ----- From: "David Keith" <[email protected]> To: [email protected] Sent: Monday, June 20, 2011 4:38:16 PM Subject: [geo] Cost of Air Capture and the APS report Several recent posts have referred to the American Physical Society’s report on Air Capture. We posted a critique of the report and in turn the APS released an updated version that—using a post-facto kluge—addressed two of the errors that had identified. The our comments are posted on www.carbonengineering.com the website of our Air Capture startup company, the deep link is here: http://www.carbonengineering.com/wp-content/uploads/2011/05/CE_APS_DAC_Comments.pdf . We at Carbon Engineering are self-interested. Of course! But that cuts both ways. We have a huge incentive do to quality engineering that can be brought to market and not to waste our time on stuff that does not make sense. Speaking for myself, I have opportunities to do commercial work on both AC and on biomass with capture (BECCS). And I have access to high quality proprietary engineering and economic analysis of both. If I thought that BECCS was much cheaper than AC then I would not be working on AC. David -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
