Hello Michael et al., I think you make some excellent points, Michael, and I have only one comment to make regarding them:-
You say that: "MCB may not provide as even a drop in temperature as SSI". This is basically true. However, work spear-headed by Stephen Salter indicates that it may be possible, with MCB, to determine [for all sets of locations] the cooling effect at chosen regions resulting from cloud seeding at a specified set of other locations. If this proves to be possible, then MCB could possess a valuable degree of flexibility - to optimize the seeding amounts and locations required (for example) for hurricane weakening or coral reef preservation [both via oceanic surface water cooling], or polar ice maintenance [via MCB seeding] in specified regions. This is in addition to our primary objective - holding roughly constant the average global surface temperature and polar sea-ice coverage. Best Wishes, John. John Latham Address: P.O. Box 3000,MMM,NCAR,Boulder,CO 80307-3000 Email: [email protected] or [email protected] Tel: (US-Work) 303-497-8182 or (US-Home) 303-444-2429 or (US-Cell) 303-882-0724 or (UK) 01928-730-002 http://www.mmm.ucar.edu/people/latham ________________________________________ From: [email protected] [[email protected]] on behalf of Michael Hayes [[email protected]] Sent: 04 September 2013 00:50 To: [email protected] Subject: [geo] Re: Global solicitation for new ideas is needed more than ever Mark, It does come down to funding. Even simple ideation on this issue requires researching well into the third and even forth level of effects and doing so on multiple levels of 'context'. And, those doing that kind of work need to be funded as this is an expensive 'hobby' for most folks researching in this area. As you know the complexities are significant. An example concerning SRM is; 1) MCB may not provide an even drop in temperature as SSI, yet MCB has limited transboarder issues which is a major limiting factor for SSI. 2) MCB has no potential to cause significant second and third order effects in the polar regions where SSI does. 3) SSI not be put through much of any form of 'trial run' where MCB can. The list goes on and on. One new idea that has been developing is using large scale ocean cultivation instilations to provide both SRM and ocean surface cooling while providing CDR and profits from mariculture. Yet, it will take a small team to work through all the compleities of such an idea. Where is the money to support the developement of new ideas? If you find such, please keep my email address in mind. Best, Micahe On Sunday, September 1, 2013 5:52:37 AM UTC-7, Mark Massmann wrote: There are a number of posts, presentations and reports which have claimed that the SRM approach of stratospheric aerosols "will definitely work" because it would simulate how Mt. Pinatubo's eruption cooled the planet. I maintain that not only is that claim false, but it is making the search for other promising SRM methods seem much less urgent, when in fact the opposite is true. The urgent truth is that more promising SRM methods need to be identified ASAP by engaging a much wider participation from the global science and engineering communities (among other experts). After all, aren't the concepts of Sulfate Aerosols and Marine Cloud Brightening both over 20 years old? What does that say about the success of geoengineering efforts since then? The claim that sulfate aerosols would cool the planet like Mt. Pinatubo is far too simplified, and there are far too many unknowns at this point to understand the aerosol's true effect. Unknowns include everything from what to inject to how to deliver it, how to properly disperse it, the resulting particulate size and resulting albedo, the fallout time and the effect on lower level clouds, as well as the damaging effect on the ozone layer and the resulting acid rain. I have been calling for a global solicitation of SRM concepts with this group for over 3 years now. I'm afraid that we are now running out of time- so it's more urgent than ever that this gets done. Please reply with comments- thanks. Mark Massmann -- 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 http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/groups/opt_out. -- 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 http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/groups/opt_out.
