That ignores monitoring and security costs, and also overlooks the cost of providing redundancy
On 4 Feb 2018 15:14, "Stephen Salter" <s.sal...@ed.ac.uk> wrote: Andrew Allowing for spray vessels being in the wrong place or out of action I would like a fleet of 600 to hold warming at its present level. This is based on the assumptions of figure 3 of my Phil. Trans. 2008 paper and could be adjusted for any others. At $4 million US per vessel based on 1940 corvettes and actual component quotes this a capital outlay of $ 2.4 billion. To pay this off over the lifetime of 25 years and do some maintenance might cost $240 million a year. If we divide this by a world population of 7 billion this is 3 cents US a head per year. It will go up with a log term for higher CO2. Can I keep the 97 cents change? Stephen Emeritus Professor of Engineering Design. School of Engineering, University of Edinburgh, Mayfield Road, Edinburgh EH9 3DW, Scotland s.sal...@ed.ac.uk, Tel +44 (0)131 650 5704 <+44%20131%20650%205704>, Cell 07795 203 195, WWW.homepages.ed.ac.uk/shs, YouTube Jamie Taylor Power for Change On 04/02/2018 14:53, Ronal W. Larson wrote: Andrew: cc list For biochar, add the concepts of internal rate of return (IRR) and recommended analysis time period (30 years? 100 years?) (as a few of the needed extra parameters, for given types of soil, climate, species, etc). First cost is not the right parameter. Ron On Feb 4, 2018, at 5:28 AM, Andrew Lockley <andrew.lock...@gmail.com> wrote: Hi I'm designing a survey on attitudes to CE, and I'm trying to simplify the costs estimates by making it per person per year. I've put $1 for SRM and $100 for CDR - but it occurs to me that this is really very complicated. Has anyone done any proper research on this? I can't find anything... Typically, SRM is costed on a program basis (bn/yr globally) but CDR is costed per tonne (and volumes are highly variable). Issues to roll into this calculation are * population growth * future emissions (CDR gets a lot more expensive, if you're still emitting) * whether temperature stabilises or reduces - and how fast * experience/cost curve for each approach * how much heterogeneity to expect (it's likely impractical to expect only a single CDR to do everything) There are probably other factors. This strikes me as something that's sufficiently useful to be worked up into a paper. Andrew -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
