Hello Neil, Andrew et al.
Cloud seeding (principally to make rain) has had a long and highly chequered
history in the 60 years since Vonnegut, Schaefer Langmuir did their
pioneering work. Many studies since then were contaminated by commercial
interests. There is no essentially no consensus
Hi Andrew,
Please pass these comments on to your colleague, Stewart Brand.
I agree with the four categories but would add a fifth band - call them
RATIONAL ACTIVISTS.
This is a growing band of mainly scientists and engineers who argue with
the WARNERS that emissions reductions will not alone
With one exception, I agree with John. The exception is that I think it has
been demonstrated that one can clear an ice fog with seeding, and this has
been done to open airports, etc.--not to generate precipitation (in any
form).
I would add that the water vapor content of air and clouds above
Hello Mike et al,
I agree entirely with you Mike that seeding can cause ice fogs to disperse.
Also electrostatic droplet seeding could help dissipate warm fogs. I should
have more carefully indicated that I was focusing on seeding of clouds
containing ice, and particularly mixed-phase clouds.
Hi John,
I saw some research somewhere that said that global cloud cover had
decreased over the past decades, contributing slightly to global
warming. But I can't find it now. Do you know about it? Could it be
due to black carbon? Here's an extract from a Hansen essay:
'Black carbon
I've followed up with a little more research into atmospheric
aerosols, black carbon in particular, and find references that seem to
indicate a mean particle size of under one micron for BC particles
(0.2 microns) that are lofted into the atmosphere and thus can be
transported long distances. I
What is electrostatic drop seeding. Can it be scaled up?
On Dec 16, 12:02 pm, John Latham john.latha...@manchester.ac.uk
wrote:
Hello Mike et al,
I agree entirely with you Mike that seeding can cause ice fogs to disperse.
Also electrostatic droplet seeding could help dissipate warm fogs. I
Gosh John, what are those of us who simply accept the observations as just
what they are (and accept the models as no more than they are) and admit
there is rather a great deal of uncertainty. Oh, I know. We are SCIENTISTS.
/sarcasm off
d.
On Wed, Dec 16, 2009 at 8:35 PM, John Nissen
