New Geoengineering Study
A number of people have sent me links to reports about a new geoengineering study to be released tomorrow (the 28th) in Atmospheric Chemistry and Physics, an open-access science journal from the European Geosciences Union. I haven't seen the study itself yet -- I'll download it as soon as it becomes available -- but from what's been reported, it looks like a good attempt to grapple with the diverse effects from different geoengineering strategies.
The quick conclusion from reading the various reports about the report is that no one approach to geoengineering is a magic bullet. A combination of programs, with some insolation-blocking (likely with stratospheric sulphates) and some carbon sequestration (through buried charcoal and "biochar"), seems the most reasonable partner to aggressive emissions reductions.
It's increasingly hard for me to see a climate survival strategy that doesn't involve some geoengineering. Reports like this one are important tools in helping us figure out what we can do, carefully, and what's not worth the risk.