Hi Renaud, We discuss general issues common to all SRM proposals. We illustrate these issues using SAI as our example but the issues are generalizable.
One area which we didn't cover was very short timescale deployment choices, e.g. short lead-time weather control and seasonal weather influence. This short-term control is not possible with SAI but MCB and CCT would allow it. These would certainly raise tricky governance issues but we didn't discuss those. Cheers, Pete ---------------------------------------------------------------------------------- I'll be starting as a lecturer at the Earth Sciences department at UCL in January! My UCL email is active and is: [email protected] *New paper in Nature Climate Change <https://www.nature.com/articles/s41558-019-0398-8>* *Halving warming with idealized solar geoengineering moderates key climate hazards* Co-authored with Kerry Emanuel, David Keith, Gabriel Vecchi, Larry Horowitz and Jie He Peter J. Irvine Postdoctoral Fellow Harvard University John A. Paulson School of Engineering and Applied Sciences (SEAS) Address:Anderson/Keutsch/Keith Groups, Harvard University, 12 Oxford Street, Link Rm. 261, Cambridge, MA 02138 Email: [email protected] Twitter: @peteirvine Citations: https://scholar.google.de/citations?user=7asLSCEAAAAJ&hl=en On Wed, 25 Sep 2019 at 09:57, Renaud de RICHTER <[email protected]> wrote: > Hi Pete, > In "solar geoengineering" and "deployment", do you include all SRM > technolohgies and methods, or only SAI? > Bw > Renaud > > Le mer. 25 sept. 2019 à 15:54, p.j.irvine <[email protected]> a écrit : > >> Technical characteristics of a solar geoengineering deployment and >> implications for governance >> Douglas G. MacMartin >> <https://www.tandfonline.com/author/MacMartin%2C+Douglas+G>[image: ORCID >> Icon] <https://orcid.org/0000-0003-1987-9417>,Peter J. Irvine >> <https://www.tandfonline.com/author/Irvine%2C+Peter+J>[image: ORCID Icon] >> <https://orcid.org/0000-0002-5469-1543>,Ben Kravitz >> <https://www.tandfonline.com/author/Kravitz%2C+Ben>[image: ORCID Icon] >> <https://orcid.org/0000-0001-6318-1150> &Joshua B. Horton >> <https://www.tandfonline.com/author/Horton%2C+Joshua+B>[image: ORCID >> Icon] <https://orcid.org/0000-0003-3606-6039> >> >> >> ABSTRACT >> >> Consideration of solar geoengineering as a potential response to climate >> change will demand complex decisions. These include not only the choice of >> whether to deploy solar engineering, but decisions regarding how to deploy, >> and ongoing decision-making throughout deployment. Research on the >> governance of solar geoengineering to date has primarily engaged only with >> the question of whether to deploy. We examine the science of solar >> geoengineering in order to clarify the technical dimensions of decisions >> about deployment – both strategic and operational – and how these might >> influence governance considerations, while consciously refraining from >> making specific recommendations. The focus here is on a hypothetical >> deployment rather than governance of the research itself. We first consider >> the complexity surrounding the design of a deployment scheme, in particular >> the complicated and difficult decision of what its objective(s) would be, >> given that different choices for how to deploy will lead to different >> climate outcomes. Next, we discuss the on-going decisions across multiple >> timescales, from the sub-annual to the multi-decadal. For example, feedback >> approaches might effectively manage some uncertainties, but would require >> frequent adjustments to the solar geoengineering deployment in response to >> observations. Other decisions would be tied to the inherently slow process >> of detection and attribution of climate effects in the presence of natural >> variability. Both of these present challenges to decision-making. These >> considerations point toward particular governance requirements, including >> an important role for technical experts – with all the challenges that >> entails. >> >> *Key policy insights* >> >> - >> >> Decisions about solar geoengineering deployment will be informed not >> only by political choices, but also by climate science and engineering. >> - >> >> Design decisions will pertain to the spatial and temporal goals of a >> climate intervention and strategies for achieving those goals. >> - >> >> Some uncertainty can be managed through feedback, but this would >> require frequent operational decisions. >> - >> >> Some strategic decisions will depend on the detection and attribution >> of climatic effects from solar geoengineering, which may take decades. >> - >> >> Governance for solar geoengineering deployment will likely need to >> incorporate technical expertise for making short-term adjustments to the >> deployment and conducting attribution analysis, while also slowing down >> decisions made in response to attribution analysis to avoid hasty choices. >> >> >> https://www.tandfonline.com/doi/full/10.1080/14693062.2019.1668347 >> >> Ping me and I can send a copy if you don't have access. >> >> Cheers, >> >> Pete >> >> -- >> 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 view this discussion on the web visit >> https://groups.google.com/d/msgid/geoengineering/90cf14fd-59c6-4baf-9263-bd4a2fd38457%40googlegroups.com >> <https://groups.google.com/d/msgid/geoengineering/90cf14fd-59c6-4baf-9263-bd4a2fd38457%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. 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