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Originally posted by luxordelphi
Your looney tunes website has never proven outrageously persistent contrails. There is nothing on your website or on any website anywhere that proves that grids in our skies are contrails. It's an assumption. A dangerous one.
There is nothing on your website or on any website anywhere that proves that grids in our skies are contrails. It's an assumption. A dangerous one.
...and yet the very first sentence in the paper explicitly says this " It is OFTEN observed that contrails spread considerably"
In the entire above post....I saw nothing that addressed the topic, addressed the science, or offered an alternative explanation.
The exhaust contrail is formed by the addition to the atmosphere of sufficient water vapor from aircraft exhaust gases to cause saturation or supersaturation of the air. Since heat is also added to the atmosphere in the wake of an aircraft, the addition of water vapor must be of such magnitude that it saturates or supersaturates the atmosphere in spite of the added heat. There is evidence to support the idea that the nuclei which are necessary for condensation or sublimation may also be donated to the atmosphere in the exhaust gases of aircraft engines, further aiding contrail formation. These nuclei are relatively large. Recent experiments, however, have revealed that visible exhaust contrails may be prevented by adding very minute nuclei material (dust, for example) to the exhaust. Condensation and sublimation on these smaller nuclei result in contrail particles too small to be visible.
Originally posted by luxordelphi
reply to post by EyeDontKnow
In the entire above post....I saw nothing that addressed the topic, addressed the science, or offered an alternative explanation.
What science is that? Outrageously persistent contrails need ideal, exact conditions. Because of this, they are easy to eliminate.
Exhaust Contrails
The exhaust contrail is formed by the addition to the atmosphere of sufficient water vapor from aircraft exhaust gases to cause saturation or supersaturation of the air. Since heat is also added to the atmosphere in the wake of an aircraft, the addition of water vapor must be of such magnitude that it saturates or supersaturates the atmosphere in spite of the added heat. There is evidence to support the idea that the nuclei which are necessary for condensation or sublimation may also be donated to the atmosphere in the exhaust gases of aircraft engines, further aiding contrail formation. These nuclei are relatively large. Recent experiments, however, have revealed that visible exhaust contrails may be prevented by adding very minute nuclei material (dust, for example) to the exhaust. Condensation and sublimation on these smaller nuclei result in contrail particles too small to be visible.
Everybody agrees they're bad - whether chemtrail or contrail. Why go on with it? Just get rid of them.
Originally posted by luxordelphi
reply to post by EyeDontKnow
In the entire above post....I saw nothing that addressed the topic, addressed the science, or offered an alternative explanation.
What science is that? Outrageously persistent contrails need ideal, exact conditions. Because of this, they are easy to eliminate.
Exhaust Contrails
The exhaust contrail is formed by the addition to the atmosphere of sufficient water vapor from aircraft exhaust gases to cause saturation or supersaturation of the air. Since heat is also added to the atmosphere in the wake of an aircraft, the addition of water vapor must be of such magnitude that it saturates or supersaturates the atmosphere in spite of the added heat. There is evidence to support the idea that the nuclei which are necessary for condensation or sublimation may also be donated to the atmosphere in the exhaust gases of aircraft engines, further aiding contrail formation. These nuclei are relatively large. Recent experiments, however, have revealed that visible exhaust contrails may be prevented by adding very minute nuclei material (dust, for example) to the exhaust. Condensation and sublimation on these smaller nuclei result in contrail particles too small to be visible.
Everybody agrees they're bad - whether chemtrail or contrail. Why go on with it? Just get rid of them.
Originally posted by luxordelphi
reply to post by Thorr
...and yet the very first sentence in the paper explicitly says this " It is OFTEN observed that contrails spread considerably"
How does a statement about the 'considerable spreading' of contrails relate to their occurrence?
Let's face it, it's an inconvenient study. It shows that contrails are hard to produce even when you have perfect conditions.