I think chemtrails are one of the funnier conspiracies I've seen.

I can understand how people think persistant contrails are odd, but I don't understand why those people keep believing in chemtrails after all the scientific FACT about persistant contrails.

Take an ice cube out of your freezer and place it on the hood of a black car in the middle of the summer. It will melt right away. Take a second ice cube out of the freezer and place it in the refridgerator. It will take hours to melt. The contrails are no different.

Here's another simple parallel. Have you ever seen a weather radar that showed a big green snow shower over your house, but it wasn't snowing outside? You may have even heard the weather reporter say it's snowing in the upper atmosphere, but not at ground level. What happens there is that the air is very dry and absorbs the snow as it begins to fall. After a few hours of snow falling and being absorbed, the air becomes saturated (the humidity has become high enough) and the snow falls to ground level. This same effect causes some contrails to dissipate quickly and others to persist for hours.

To those of you who claim the difference between contrail and chemtrail is that chemtrail lasts longer.

Not necessarily! Contrails can last in the atmosphere very long too. The reason contrails exist in the first place is because of moisture released from the aircraft due to combustion reaction (AFAIK ALL combustion reactions have CO2 and H2O as products)

Air can dissolve water moisture, but only so much moisture can be dissolved. If air is saturated with moisture, additional moisture pumped into it will look like clouds, which is essentially what the contrail is.

If air is not saturated, additional moisture pumped into it will slowly disappear (dissolved into air).

The amount of moisture the air can hold depends on the temperature. The colder the temperature, the less moisture that air can dissolve.

So therefore, on a cold day where the amount of moisture in the air is close to the maximum amount that the air AT THAT TEMPERATURE can hold, contrails can last very long. If the air is actually saturated, contrails will last until the moisture level decreases. Contrails disappear fairly quickly if it's a warm or very dry day.

I am not denying the possibility of the use of chemtrails though. If on a hot and dry day, you see a trail from a plane that lasts for very long time, then you should be worried!

[edit on 13-4-2005 by Taishyou]

Originally posted by Taishyou


I am not denying the possibility of the use of chemtrails though. If on a hot and dry day, you see a trail from a plane that lasts for very long time, then you should be worried!

Excellent post Taishyou I agree with most everything you said, except what I quoted above. Even on a hot day at earths surface, the temps in the atmosphere can still reach below freezing. There is a difference in ground temps and atmospheric temps.

Has anyone ever looked up at the moon at night on a cold winter evening on a cloudy night, and noticed a light ring around the moon? I mean, you can tell it's not part of the moon, but it does have to do with the light being reflected off ice crystals in the sky.

Has to do with the humidity of the sky, possibly the same reason for persistant contrails.

Shattered OUT...

What makes people believe in these chem-trails anyway?

I mean, this is just WAY WAY out there...

I think OtS sufficiently debunked this theory...

Yeah, that's the moonlight being refracted through tiny ice crystals in the atmosphere. Really cool effect. Sometimes you can even see moondogs in the rings.