Dear Doug , I am sorry for the misunderstanding : I am clearly for doing efforts on other approaches including SRM
But the situation as it stands is that the only solution conceptually that can address the threat of climate change without the risk of adverse impacts is DAC with permanent storage. Yet it is the only approach to this date that has effectively zero public funding support and until very recently policy support. So my argument is that we all should support public funding of DAC efforts that can be published and shared that will test the premise that it can be done at low cost at a gigatonne scale. What I have further shared is that our commercial efforts involving experts in industrail gas technology ( eg separating gases from air) have determined that $50 per tonne DAC is achievable and that we are having great commercial success -so much so that I have committed us not to seek public funding if it were approved. So the only reason I am writing about this is because I do not think we should delay investing in DAC till as you say Once we have demonstrated DAC with permanent storage at Gt scale and proven it to be low cost with no side effects, When I read that I think that every year we delay starting a serious effort on DAC is a year longer of risking catastrophic climate change -the overshoot will be more and the time will be greater. So I literally believe that I need to surpress my interests in the company where others delaying is better(less competition) and instead as a scientist try to get people to understand that DAC will be low cost -all we have to do is do it . Furthermore I argue that our patents that are public enable an indpendent person like Ellen Stechl to understand why DAC can be low cost and why others are mistaken in asserting otherwse . Peter On Sun, Dec 3, 2017 at 4:30 AM, Douglas MacMartin <[email protected]> wrote: > Peter, > > > > Once we have demonstrated DAC with permanent storage at Gt scale and > proven it to be low cost with no side effects, then I would agree that we > can stop researching other options. Until then I think it is premature to > declare that we have found the solution and can ignore every other option. > I know you disagree with me, but I do not think that we know what the costs > of a technology are going to be when we haven’t implemented it at even a > tiny fraction of a meaningful scale. I’m not convinced that it will be as > cheap as you believe it to be, but furthermore, it is not possible for you > to convince me without demonstrating both removal and storage at Gt scale; > sorry, but I’ve been an engineer all my life and have seen my share of > overconfident predictions (and probably safe to say zero accurate > predictions at this stage of technology development), and I simply don’t > believe that it is theoretically possible to accurately predict costs and > issues to sufficient accuracy without actually doing something. > > > > Therefore I don’t understand why you insist on picking the right solution > today and stopping all research on all other solutions. I don’t view this > as a competition. > > > > At any rate, if you have any concern about nonlinearities and tipping > points, you should strongly support research into SRM, as that’s a pretty > strong argument in favour of it. We don’t know what would happen if we > allowed the planet to keep warming, but we’re a lot less likely to pass > major earth system tipping points if we keep the system “closer” to the > current state. That is, of course it is almost trivially true that a world > that is say 1.5C (just to use the Paris number, not endorsing it) due only > to CO2 is less risky than a world that would have been 3C due to CO2 but is > brought back to 1.5C with SRM. But that second scenario is quite likely to > be less risky than allowing a 3C world. Although we don’t actually know > that today, not without further research. So I’m not sure why you’re so > vehemently opposed to any further research into SRM… which is how I > interpret your comments. > > > > doug > > > > *From:* [email protected] [mailto:geoengineering@ > googlegroups.com] *On Behalf Of *Peter Eisenberger > *Sent:* Sunday, December 03, 2017 4:48 AM > *To:* Michael Hayes <[email protected]> > *Cc:* geoengineering <[email protected]>; David Keith < > [email protected]> > *Subject:* Re: [geo] Scientists Look to Bali Volcano for Clues to Curb > Climate Change - Scientific American > > > > Vocanic euptions have impacts that are much more imporant than their > transitory impact on climate. Their most significant role is in > replenishing critcal elements to preserve the fertiliity of the soil. > > This in turn of course raises the issue of what the impact will be of > human efforts to do SRM on the rest of the ecosystems. This in turn is the > cause for concern about unexpected consequences and a concern that cannot > be addressed > > by theory or experiment because complex systems evolution is not > predictable and we only have one planet. The important aspect of climate > change from a risk perspective is not the first order linear responses but > rather whether one crosses some tipping point where the internal feedbacks > drive the system to a very different and usually catastrophic state. Such > tipping points are an inherent property of both the climate and the > ecosystems and ala the butterfly effect are inherently unpredictable. > > Thus the real issue is not how SRM is like volcanoes but rather what are > the unintended feedback from SRM. As a physicist ,and not a DAC advocate, > the fact is that DAC with permanent storage is the path to address the risk > of catastrophic climate change that has the lowest risk of triggering > adverse impacts compared to alternatives when implemented at a global > scale for any signiifcant period of time. > > > > It is clear to that all of us share the goal of wanting to prevent the > consequences of catastrophic climate change. So in the positive spirit of > tryimg to develop a consencus ageneda I assert > > > > The BEST path to address the threat of catastrophic climate change > involves DAC with permeant storage -it is necessary . > > > > I respectfully ask for resposes to this assertion and that we have a > constructive dialoque to see if if stands up to scrutiny. I do not want > to be asserting an incorect postion but I do want our community > > to develop a clear science based consencus for the best actions to take. > > > > Again to be clear I personally support R&D on SRM but in the context that > DAC with permanent storage is the clear priority. If my assertion is wrong > and in fact we have no low risk and cost path to addressing the risk than > of course SRM would have a high priority and I would want us to be > asserting that . > > > > On Sat, Dec 2, 2017 at 11:10 AM, Michael Hayes <[email protected]> > wrote: > > Sentinel-SP5 feed: > > http://m.esa.int/spaceinimages/Images/2017/12/Sentinel-5P_captures_Bali_ > volcanic_eruption > > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > > CONFIDENTIAL INFORMATION: This email message and all attachments contain > confidential and privileged information that are for the sole use of the > intended recipients, which if appropriate applies under the terms of the > non-disclosure agreement between the parties. > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > -- CONFIDENTIAL INFORMATION: This email message and all attachments contain confidential and privileged information that are for the sole use of the intended recipients, which if appropriate applies under the terms of the non-disclosure agreement between the parties. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. 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