Andrew:
There are many unknowns due to the infantile state of the climate science. Whether it is 5-10 years or 25 before warming begins to introduce additional dangers, some not yet anticipated, there is no doubt it will. No doubt you heard of Reilly's addendum to Murphy's Law. Reilly was a graduate student of Prof. Murphy. His robust hypothesis was that Murphy was an optimist. I would bet on upper atmosphere SO2 additions for cooling, since for sure it works and is relatively easy to implement, and pray there are no unmanageable consequences. -gene From: [email protected] [mailto:[email protected]] On Behalf Of Andrew Lockley Sent: Sunday, April 10, 2011 9:54 AM To: geoengineering Subject: [geo] Can SRM save our Bacon? Hi I wonder if anyone can shed light on the potential of geoengineering in a high GHG atmosphere ? If we have massive methane excursions from the arctic, will we be able to create a safe climate? The paleoclimatic record shows dramatic cooling through volcanism, but that wasn't in a high GHG world . If there's a whole load of methane around, there will be a massive polar amplification. This reduces the ocean over turning circulation , and potentially lead to an anoxic event, and possibly further methanogenesis. I am not sure that, even with a maximal SRM effort, we can avoid the climate transitioning into a state in which society is unsustainable due to an anoxic event. If this is the case, we potentially have a very brief window in which to geoengineer, perhaps only five or ten years I'd value comments on this. Thanks A -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
