Andrew

I expect that most of the monitoring will be happening already and with 600 vessels there is already quite a lot of redundancy. We might be paid for sending local surface observations.  Operations will be far enough from shore to discourage piracy.


However if you want the double the 3 cents I will settle for the 94.

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, Cell 07795 203 195, WWW.homepages.ed.ac.uk/shs, YouTube Jamie Taylor Power for Change
On 04/02/2018 16:40, Andrew Lockley wrote:
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 <mailto: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 <mailto:s.sal...@ed.ac.uk>, Tel +44
    (0)131 650 5704 <tel:+44%20131%20650%205704>, Cell 07795 203 195,
    WWW.homepages.ed.ac.uk/shs <http://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 <mailto: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

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