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originally posted by: DerekB
a reply to: howmuch4another
All I know is that they trails differ from contrails and that the trails will often be laid in a stacked manner sometimes creating a sheet to blanked half or all of the sky. I never saw chemtrails when I was growing up that spread out to cover the entire sky and block out the sun.
With increasing vertical height, cumulus clouds are often associated with convection. Bases of these clouds are generally no more than 3,000 feet above the ground, but they can develop past the troposphere in both temperate and tropical latitudes. Cumulus clouds are classified as low yet vertically building clouds.
The troposphere is the lowest layer of Earth's atmosphere. The troposphere starts at Earth's surface and goes up to a height of 7 to 20 km (4 to 12 miles, or 23,000 to 65,000 feet) above sea level. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Almost all weather occurs within this layer. Air is warmest at the bottom of the troposphere near ground level. Higher up it gets colder. Air pressure and the density of the air are also less at high altitudes. The layer above the troposphere is called the stratosphere.
originally posted by: DerekB
a reply to: howmuch4another
I understand that contrails are supposed to form around 30,000+ ft and I have often observed chemtrails around cumulus clouds around 10,000 ft.