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Originally Posted by TrutherD
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%.
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Wrong. Cirrus clouds form in the upper troposphere.
Quote:
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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.
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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.