Hi, Ken - I'm curious if there's been much modeling, consideration or observation of the following: plenty is known about the radiative effects of the sulfur itself, but in recent years, Solomon's research on the possibly much larger impact of stratospheric water vapor on global climate than previously realized (http://www.noaanews.noaa.gov/stories2010/20100128_watervapor.html) makes me wonder, could analogous extended indirect effects that Shindell found for methane oxidation in the troposphere take place in the stratosphere? Since methane hydroxylation is slowed there via competition for hydroxyl in the reactions turning SO2 to sulfates, and since methane oxidation is a primary cause of stratospheric water vapor, and since CH4 lifetime increase is indistinguishable from increase in abundance, could having a sudden infusion of sulfur then play out more slowly with radiative effects after the cooling period is gone via increased water vapor and hence warming?
Cheers, Nathan http://www.noaanews.noaa.gov/stories2010/20100128_watervapor.html http://www.realclimate.org/index.php/archives/2010/01/the-wisdom-of-solomon/ On Wednesday, July 17, 2013 4:20:24 PM UTC-4, Ken Caldeira wrote: > > With respect to learning more about potential consequences of solar > geoengineering, what kinds of observing systems do we need in place to > take maximal advantage of the next big volcano? > > What would we want to have in space (and why)? > > What would we want to have in airplanes (and why)? > > What would we want on the ground (and why)? > > How would these assets be utilized when there is no big volcano? > > Are there any high-quality reports or studies that address this issue? > > - > > > -- > _______________ > Ken Caldeira > > Carnegie Institution for Science > Dept of Global Ecology > 260 Panama Street, Stanford, CA 94305 USA > +1 650 704 7212 [email protected] <javascript:> > http://dge.stanford.edu/labs/caldeiralab @kencaldeira > > *Caldeira Lab is hiring postdoctoral researchers.* > *http://dge.stanford.edu/labs/caldeiralab/Caldeira_employment.html* > > Assistant: Sharyn Nantuna, [email protected] <javascript:> > > > > -- 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.
