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Originally posted by adeclerk
I thought that study actually showed that it was much better to break up the missile in the air via interception, because the spread wouldn't be as harmful as if it exploded at a lower altitude? Can you find the link again, I'd be curious to see.
However, since the air temperature at higher altitudes can be as low as -70 ° Fahrenheit, it is likely that dispersal of chemicals at these altitudes would result in the formation of considerably larger aerosol particles that would fall at still higher rates. These particles would initially be frozen (rather than being a liquid that suffers evaporation as at lower altitudes) until they drop below about 2 kilometers altitude. Since the cloud of large particles (of diameters perhaps of thousands of Am) would fall quite fast (perhaps 10 or more m/sec), it would likely be distributed in a column of air of only a few kilometers altitude. In a wind field of .9 m/sec, such a cloud could deposit a large fraction of its total chemical content on the ground over a downwind distance of several kilometers.
Originally posted by adeclerk
reply to post by FreeSpeaker
Thanks, freespeaker.
Now, what does this mean for spraying a chemical at high altitude? I'm not sure, do we have any physicists around here?
I feel like a sprayer would freeze at high altitudes, but I'm unsure since AFAIK nothing has ever been sprayed above a few thousand feet.edit on 8/18/11 by adeclerk because: (no reason given)