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Re: Dust Aloft Late Breaking-OT

In a message dated 99-10-06 14:13:58 EDT, you write:

elton<< 
      The study shows that the "warm rain" processes that often 
 create rain in tropical clouds are practically shut off when the 
 clouds are polluted with heavy smoke from forest fires.  In these 
 clouds, scientists found, the cloud tops must grow considerably 
 above the freezing level (16,000 feet) in order for them to start 
 producing rain by an alternative mechanism.
  >>

The effects they were observing were of clouds within the troposphere where 
most of our normal weather occurs. But in relation to this discussion, the 
article also indicates nothing to show the inhibition of the formation of 
moisture by the alternative mechanisms in the upper regions.   From a large 
impact, copious amounts of water vapor is driven by a high rising super 
heated air mass to where it will eventually condense out from colder air or 
the cold of space itself if it rises that high. There will probably be a 
significant amount of collodial suspension to be seen as from volcanoes for a 
few years, but dust dense enough to blot out all sunlight for dozens of years 
doesn't seen likely to me. 
GeoZay

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