*The following email to <[email protected]> was deemed more appropriate for <[email protected]>*
John: I have no science to confirm or dispute your concerns. The most recent graphs on sea ice I've seen shows things are returning toward the mean. I'm not prepared to increase alarms based on what I've seen. Further, the environmental groups have chosen to focus on only those subjects that avoid geoengineering. So, I really can not help the community in any useful manner. The necessary institutional structures are not in place and absent funding for that, I do not see a rapid flow of resources into research on geo. Good luck. David Schnare Center for Environmental Stewardship On Jan 2, 2009, at 6:45 PM, John Nissen <[email protected]> wrote: > > > Thanks, Stephen. > > Although the Arctic tipping points and sea ice are specifically > mentioned by Chris Rapley and Neil Wells, we have the situation that: > (a) none of the other experts seem aware both that the sea ice is a > potential tipping point for the Earth system - and (b) most > importantly, none of them recognise that emissions reduction is > useless to halt the retreat of the sea ice in the necessary > timescale. Indeed it is not conceivable to halt the sea ice retreat > without geoengineering to cool the region - and stratospheric aerosols > and marine cloud brightening are probably the only two feasible > techniques for cooling the region quickly enough to have a good chance > of halting the sea ice retreat. > > BTW, I am really disappointed that neither David Schnare nor Albert > Kallio made this point - I know Albert is as concerned as anyone > about the speed of sea ice retreat and repercussions thereof. > > This is really bad news to begin 2009, as it was a chance missed. > > We can do better, and we must > > John > > > > On Jan 2, 1:18 pm, Stephen Salter <[email protected]> wrote: >> . . . . and one more at >> >> http://www.independent.co.uk/environment/climate-change/what-can-we- >> d... >> >> Stephen >> >> -- >> Emeritus Professor of Engineering Design >> School of Engineering and Electronics >> University of Edinburgh >> Mayfield Road >> Edinburgh EH9 3JL >> Scotland >> tel +44 131 650 5704 >> fax +44 131 650 5702 >> Mobile 07795 203 195 >> [email protected]http://www.see.ed.ac.uk/~shs >> >> The University of Edinburgh is a charitable body, registered in >> Scotland, with registration number SC005336. > ___________________________________________________ Ken Caldeira Carnegie Institution Dept of Global Ecology 260 Panama Street, Stanford, CA 94305 USA [email protected]; [email protected] http://dge.stanford.edu/DGE/CIWDGE/labs/caldeiralab +1 650 704 7212; fax: +1 650 462 5968 --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
