*Thus, an obvious path to avoiding sky whitening is to greatly limit or avoid entirely the intentional introduction of sulfate particles into the stratosphere.*
I agree with the avoiding part of this sentence. I live in Maine where the sky really is blue and would hate to see skies here and around the world looking white and hazy as do *"average conditions in urban areas today."* Please remember that SRM would also attenuate starlight, so night sky viewing with sulfate geoengineering would also emulate *"average conditions in urban areas today."* How sad. Thus, an obvious path to preserve the wonder of the night sky is to avoid entirely the intentional introduction of sulfate particles into the stratosphere. You can argue from models or from aesthetics and culture. I think the question mark in the title after whiter skies needs to be an exclamation point. Jim On Thu, Aug 9, 2012 at 11:50 PM, Ken Caldeira <kcalde...@carnegiescience.edu > wrote: > Folks, > > We made a YouTube video to go with a recent study on whiter skies led by > Ben Kravitz: http://youtu.be/JO5q2UqBncA > > The underlying paper is attached and also available at: > http://www.agu.org/pubs/crossref/2012/2012GL051652.shtml (subscription > required). > > The citation is: > > B. Kravitz, D.G. MacMartin, and K. Caldeira > Geoengineering: Whiter skies? > GEOPHYSICAL RESEARCH LETTERS, VOL. 39, L11801, 6 PP., 2012 > doi:10.1029/2012GL051652 > > Best, > > Ken > > PS. While we were at it, we made a YouTube video for a recent study that > was led by Julia Pongratz: https://www.youtube.com/watch?v=zRh_Zfr6A08 > > Pongratz, J., and K. Caldeira, 2012: Attribution of atmospheric CO2 and > temperature increases to regions: importance of preindustrial land use > change. Environmental Research Letters, Vol. 7, 034001 > doi:10.1088/1748-9326/7/3/034001 > > That one is available without a subscription at > http://iopscience.iop.org/1748-9326/7/3/034001/ > > _______________ > Ken Caldeira > > Carnegie Institution for Science > Dept of Global Ecology > 260 Panama Street, Stanford, CA 94305 USA > +1 650 704 7212 kcalde...@carnegiescience.edu > http://dge.stanford.edu/labs/caldeiralab @kencaldeira > > *Our YouTube videos:* > Climate change and the transition from coal to low-carbon electricity: Ken > Caldeira <http://www.youtube.com/watch?v=a9LaYCbYCxo> > Crop yields in a geoengineered climate: Dr. Julia > Pongratz<http://www.youtube.com/watch?v=fhxzOUQVD38> > More videos<http://dge.stanford.edu/labs/caldeiralab/Caldeira_Videos.html> > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To post to this group, send email to geoengineering@googlegroups.com. > To unsubscribe from this group, send email to > geoengineering+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/geoengineering?hl=en. > -- James Fleming STS Program Colby College 5881 Mayflower Hill Waterville, ME 04901 Ph: 207-859-5881 Fax: 207-859-5846 Web: http://www.colby.edu/profile/jfleming <http://web.colby.edu/jfleming> -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to geoengineering@googlegroups.com. To unsubscribe from this group, send email to geoengineering+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
