The article concludes: Finally, recent work suggests that human activity has led to a substantial > increase in atmospheric dust concentrations and that the sources of this > dust have > changed9<http://www.nature.com/nature/journal/v498/n7454/full/nature12278.html#ref9> > , > 26<http://www.nature.com/nature/journal/v498/n7454/full/nature12278.html#ref26>. > Because potential dust sources around the world have very different > feldspar > contents18<http://www.nature.com/nature/journal/v498/n7454/full/nature12278.html#ref18>, > changes in the location of dust sources may have consequences for the > concentration of ice nuclei in the atmosphere and the associated aerosol > indirect effect.
The article also notes that at higher temperatures (above 258K) biogenic nuclei apparently become more important. BIogenic ice nuclei may also be heavily influenced by anthropocene activity. So I suspect a complex story here of "unconscious" geoengineering that is not well observed much less well understood. Way too early to start shooting feldspar into the atmosphere! ;-) --- Fred Zimmerman Geoengineering IT! Bringing together the worlds of geoengineering and information technology GE NewsFilter: http://geoengineeringIT.net:8080 On Thu, Jun 20, 2013 at 3:10 PM, Andrew Lockley <[email protected]>wrote: > It would be interesting to model the feedback loops between cloud > properties and feldspar dust production. > > The lower and more sporadic rainfall becomes, the more dust is produced (I > assume). > > I don't know what the magnitude or sign is on this feedback , but someone > probably can tell us. > > That answer will largely determine the potential for the effect to be > manipulated for geoengineering use. > > A > > -- > 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.
