We, you and I, already got into this on this thread in #14159, but was touched upon in #9656, and in #14379.
Also, I commented extensively about high cirrus in summer of '09 and about its meteorological implications. I photographed the phenomenon then.
If you'll remember, I provided a mechanism for noctilucents having to do with muon cascades, solar wind, and cosmic rays. Scafetta has an interesting model as given at various places in this thread. And there's, #17183.
Article says, "Colder temperatures allow more water to freeze, while an increase in water vapor allows more ice clouds to form."
Nope. Increase in water vapor doesn't have anything to do with ice cloud formation. There is no water vapor at such heights. Clouds there are necessarily ice of some form given the temperature. After all, the article says, "The clouds form only when temperatures drop below minus 200 degrees Fahrenheit (minus 130 degrees Celsius), when the scant amount of water high in the atmosphere freezes into ice clouds." The scant amount of water can only exist as ice, ice in different forms depending upon temperature, since at that height the temperature never rises above -100 degrees. |
