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Old 11-18-2009, 08:19 AM
Alferd Alferd is offline
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Join Date: Nov 2009
Posts: 22
Default Cloud formation

Quote:
Originally Posted by TrutherD View Post
Clouds and contrails are completely different. I covered this in my last post. Clouds form at ground level. They need DIRTY air with lots of sub-micron particles to act as condensation nuclei and high humidity in the range of 60-70%.
Wrong. Cirrus clouds form in the upper troposphere.

Quote:
Unmodified jet exhaust should not contain enough particulate matter to form a cloud and it would be impossible in low-humidity environments where chemtrails are often spotted.
And what is the basis of your claim that the upper troposphere is a low-humidity environment? (hint: it's that pesky ice supersaturation isue again)

Once ice crystals start to form in a contrail stream, they will grow untill they splinter and fracture. In this manner, the crystals propagate and multiply.
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