Sent: Wednesday, July 13, 2011 4:49:19 AM
Subject: [geo] RE: Aluminum particles as a replacement for sulfate aerosols?
David and All-
The large-scale release of aluminum particulates would be very dangerous to
people and the ecology, especially since this approach would be ongoing, so
A lot of the health and ecosystems effects particularly may be affected by
the size and shape. Think asbestos and pm2.5s for comparisons
Have you compared these parameters to natural dust?
I prefer sulphur because it is natural in the stratosphere and predictable.
It is safe on rain out, too.
A
David,
Some (entirely speculative) disadvantages might be:
1) Particles raining out and causing respiratory problems in dry
deposition, especially in Inuit communities who live pretty much at
the end of the Brewer-Dobson circulation
2) Particles staying up for longer than wanted, thus reducing
Hi Mark,
You might be interested in this work [1] - I attended the presentation
at the EGU 2011 geoengineering session, and they were talking about
producing engineered microparticles (of titanium for example) rather
than the usual sulphate aerosol. A major advantage is to be able to
