View Single Post
Old 11-22-2009, 04:19 PM
JazzRoc JazzRoc is offline
Join Date: Nov 2009
Location: El Medano, Tenerife, Canary Isles
Posts: 104
Default Re: Contrails cannot form into clouds (proof!)

Originally Posted by stompk View Post
Please explain exactly what the particles are.
Partially-burnt and unburnt hydrocarbon molecules and soot particles.
No combustion process is EVER complete when the oxidant gas (oxygen) is DILUTED 1:4 by a relatively inert gas (nitrogen).

Why is the water per meter in a contrail 1000-10000 (there's some exact science) greater than the water vapor released by "typical" aircraft.
The atmosphere is INEXACT in that it doesn't conform to your ideas of what it should be. Being natural it is continuously variable.
Stratospheric layers are always found to be PROGRESSIVELY WARMER with increasing altitude away from the tropopause. Their humidity (and therefore their saturation with respect to ice) is somewhat variable along their length and particularly variable from layer to layer.
Hence the "chemtrails on - chemtrails off" myth.

The amount of water that can exist as vapor in a given volume is proportional to the temperature. When the amount of water vapor is in equilibrium above a flat surface of water the level of vapor pressure is called saturation and the relative humidity is 100%. At this equilibrium there are equal numbers of molecules evaporating from the water as there are condensing back into the water. If the relative humidity becomes greater than 100%, it is called supersaturated. Supersaturation occurs in the absence of condensation nuclei, for example the flat surface of water.
Since the saturation vapor pressure is proportional to temperature, cold air has a lower saturation point than warm air. The difference between these values is the basis for the formation of clouds. When saturated air cools, it can no longer contain the same amount of water vapor. If the conditions are right, the excess water will condense out of the air until the lower saturation point is reached. Another possibility is that the water stays in vapor form, even though it is beyond the saturation point, resulting in supersaturation.
Supersaturation of more than 1-2% relative to water is rarely seen in the atmosphere. For high levels of supersaturation there must be no condensation nuclei for the water vapor to condense on.
Supersaturation can also occur relative to ice. This is much more common in the atmosphere than supersaturation relative to water. Water droplets are able to maintain supersaturation relative to ice (remain as liquid water droplets and not freeze) because of the high surface tension of each microdroplet, which prevents them from expanding to form larger ice crystals. Without ice nuclei supercooled liquid water droplets can exist down to about −40 C (−40.0 F), at which point they will spontaneously freeze.

Cloud physics - Wikipedia

What is the difference between typical and atypical aircraft?
The difference between THIS (TYPICAL):


The fractionally-lower combustion efficiency of the fighter aircraft (typically powered by long twin-spool turbojet engines with reheat, as opposed to the high bypass ratio turbofan engines of a modern passenger aircraft) leads to it producing a slightly less humid trail. This will lead to a slight reduction in trail density in most situations.
There are photos of an Airbus flying alongside a Boeing 707 showing the Airbus laying down a trail while the 707 does not.

You just debunked yourself.
No. I just debunked THIS THREAD.

It's taken you a while to respond properly (in a very small way) to my first post. You have a long way to go...

Last edited by JazzRoc : 11-22-2009 at 05:34 PM.
Reply With Quote