Aerodynamic condensation trails (contrails) at different altitudes seem to form differently? Although there is nothing mysterious about this, we can address the topic a bit anyway. It´s a bit nerdy too, but since I have over 7000 sky photos, well now I said it.
The aircraft condensation trails were captured on photo in Denmark on August 20, 2011, in the early morning in Odense city at around 7.30 am local time. As you can see, we had a beautiful blue summer sky so nice to wake up to.
How aerodynamic condensation trails expand and behaves
There is nothing odd with two different types of aerodynamic condensation trails. Several factors can be involved. There can be different jet engine types with varying combustion methods and various engine structures. These differences can take part in the way jet engine exhaust is released into the atmosphere. You can also have varying weather conditions at different altitudes. The ruling weather system at a certain altitude will determine how a contrail expand and behaves.
And the chemical composition of the contrail may also have a hand on this…
A contrail is technically a chemtrail
A contrail is technically a chemtrail since there are chemicals in the kerosene that are used in jet engines. And when kerosene is burned it produces byproducts like carbon dioxide (CO2), water (H2O), Nitrogen Oxides (NOx), Sulfur dioxide (SO2), Cobalt (CO) and other chemical components. These are sprayed high up in the atmosphere which you can see by the white stripes in the sky and in the contrail photos here. For more about what´s in these contrails see this thread
Aerodynamic condensation trails
Aerodynamic condensation trails are left at the same altitude where Cirrus and Cirrocumulus clouds form. Sometimes the contrails are absorbed by these weather systems and over time transform into either Cirrus or Cirrocumulus cloud type. But they will never look exactly the same as natural cloud types. There will be traits left in them that reveal the aerodynamic condensation origin. For example, the overall elongated structure is typical for a contrail. They are artificially created clouds by man.
Aerodynamic condensation trails photo gallery
See the high-resolution photos with the Aerodynamic condensation trails…
Additional information
See the weather history for Denmark (Vojens-Skrydstrup Air Base) on August 20, 2011
Camera used: Sony A-100 DSLR with a standard 18-75mm zoom lens
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