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What the authors do consider is the fact that carbon emissions are only one of the impacts of aviation. Others include the emissions of particulates high in the atmosphere, the production of nitrogen oxides, and the direct production of clouds through contrail water vapor. Over time, these thin lines of water evolve into "contrail cirrus" clouds that lose their linear features and become indistinguishable from the real thing. Although low-altitude clouds tend to cool the plant by reflecting sunlight, high altitude clouds like cirrus have an insulating effect and actually enhance warming.
Perhaps it's the other way around... perhaps contrails have become increasingly persistent as the nature of our atmosphere has changed over the decades.
Originally posted by Dilligaf28
reply to post by Jinglelord
I think your postulation is interesting. I also am willing to bet that if you watch the "chemtrail" threads you will see your postulation eventually used a a supporting "fact" to back up the "chemies" viewpoint.
Originally posted by Maxmars
reply to post by weedwhacker
I recall an anecdote, which may be fictional, that after the few days when all air traffic was halted back in 2001, there was a surprising rise in the local temperatures; ostensibly due to the lack of aircraft exhaust in the atmosphere. Do you know if this is true?
The principal emissions of aircraft include the greenhouse gases carbon dioxide and water vapor (H2O). Other major emissions are nitric oxide (NO) and nitrogen dioxide (NO2) (which together are termed NOx), sulfur oxides (SOxO), and soot.
Sorry, if this were true, it would be noticeable to pilots. (We, and the aircraft systems, do pay attention to the outside temperature of the air).
Originally posted by MathiasAndrew
[Do you fly around with a laptop making ATS posts before take off and landiong? If you ever were a pilot, being a has been doesn't qualify you to be a part of "we".