Jet Contrails. Droplets of Sulfuric Acid and particles of soot.

Whether people believe in the chemtrail theory (I do) or not, the fact of the matter remains that jet exhaust is HIGHLY pollutive.

I would suggest global warming is a fact, and jet exhaust is a major player.

Only a NASA scientist, or concerned environmentalist recognize that jet exhausts, loaded with water vapor, nitrous oxides, carbon dioxide and other aerosols, are changing atmospheric properties and photo-chemistry and affecting the health and living conditions at our planet's surface.

Yes, I know. Yesterday, I counted 15 (fifteen) aircraft in the airspace at ONE TIME. There was another 20 contrails left from previous aircraft. My eyes literally burned from it. I live @ 7000ft. Our atmosphere is normally pristine. And a clear day, you can smell the pines from a mile away. Not anymore.

A 1998 NASA study of jet contrails suggested maximal depolarization ratios were produced by ice crystals with radii as small as several tenths of a µm, explaining why they disappear in less than 20 seconds and so have different radioactive properties than cirrus clouds. In addition to producing vapor trails stretching thousands of miles across the sky, jet exhaust also seeds the atmosphere with cloud-forming aerosols - droplets of sulfuric acid and particles of soot. NASA's tests revealed that, at jet cruising altitudes, acid droplets account for at least 10 percent of the sulfur emissions.

www.coastalpost.com...

If the atmosphere were warmer than the temperature indicated by the 100% line, a contrail could not form even if the relative humidity of the atmosphere were 100 percent. The combined moisture from the jet exhaust and the atmosphere will never be enough for the mixture to produce a cloud. Temperature profiles to the right of the 100% line will never form a contrail.

asd-www.larc.nasa.gov...

In 1997, about the time "Chemtrails" showed up on the scene, scientists first measured sulphuric acid in the exhaust

Recently, our newly developed VACA ( = Volatile Aerosol Composition Analyzer) instrument was used in the "SULFUR 5" campaign in April 1997, leading to the first direct detection of sulfuric acid in the exhaust plume of a jet aircraft in flight.

www.mpi-hd.mpg.de...

So, when scientists say "it's just water vapor" they are either misinformed or spreading dis-info.

Engines can also stimulate cloud growth indirectly, by way of tiny aerosol particles within the exhaust. These aerosols-droplets of sulfuric acid and specks of soot-serve as seeds. They provide surfaces upon which water molecules can condense or freeze to create cloud particles, explains Eric J. Jensen, a participant in SUCCESS and a researcher at NASA's Ames Research Center in Mountain View, Calif.

findarticles.com...

Now, this next excerpt, sound to me like, they are intentionally doing some of this.

Results are presented for the mass fractions of SO3 and H2SO4 acquired per soot particle early in the plume, suggesting that sulfur-induced activation is an efficient pathway to increase the ability of exhaust soot emitted at altitude to host heterogeneous chemical reactions and to trigger the formation of cirrus clouds.

cat.inist.fr...

So, instead of fighting on whether they are contrails, or chemtrails, let's all agree that we need to address this issue.

It's be a long time since "the skies where not cloudy all day"



[edit on 21-5-2008 by cutbothways]

[edit on 21-5-2008 by cutbothways]

Jet engine exhaust contains carbon dioxide, oxides of sulfur and nitrogen, unburned fuel, soot and metal particles, as well as water vapor. The soot provides condensation sites for the water vapor. Any particles present in the air provide additional sites.

Depending on a plane�s altitude, and the temperature and humidity of the atmosphere, contrails may vary in their thickness, extent and duration. The nature and persistence of jet contrails can be used to predict the weather. A thin, short-lived contrail indicates low-humidity air at high altitude, a sign of fair weather, whereas a thick, long-lasting contrail reflects humid air at high altitudes and can be an early indicator of a storm.

Yes, the longer lasting contrails that form into clouds, should be an indicator of a storm, because they are cloud seeding.

CLAIMS:
1. Contrail generation apparatus for producing a powder contrail having
maximum radiation
scattering ability for a given weight material, comprising:

a. an aerodynamic housing;
b. a jet tube means passing through said housing, said tube means having an inlet at a forward end of said housing and an exhaust at a rearward end thereof;
c. a powder storage means in said housing;
d. a deagglomeration means also in said housing;
e. means connecting said powder storage means with said deagglomeration
means for feeding
radiation scattering powder from said powder storage means to said deagglomeration means;
f. the output of said deagglomeration means dispensing directly into said jet tube means for
exhausting deagglomerated powder particles into the atmosphere to form a contrail; and
h. means for controlling the flow of said powder from said storage means to said deagglomeration means.

www.luxefaire.com...

Ram-jet-like device called an afterburner, attached to the exhaust of a jet-engined ..... Silver iodide smoke particles, created by fire in special burners, ...

Source

We had better concentrate on land based sources of atmospheric pollution in proportion to the comparative volume of noxious gaseous compounds being produced at the same time if any improvement can be expected.

Acid rain was around long before aircraft could be held responsible for it.

I'd be interested in the amount of sulphur compounds entering the engine via the air intakes as well as those as impurites in the fuel if that information is available.

reply to post by Pilgrum


I thought we did that. A few years back, I was on a crew that installed new scrubbers in the smokestacks at the power plant. They are supposed to be one of the cleanest in the state now.

Government had required catalytic converters, and smog pumps for some time. Infact in some states and areas, your car has to pass a pollution test.

We went to (more expensive) unleaded as opposed to "regular" to combat pollution.

So ignoring the pollution problem from jet exhaust, is not going to make it any better.

The more progressive countries are taking positive action to reduce emmissions with things like scrubbers as you mentioned. Before that it was electrostatic precipitators on power station smokestacks removing solids but the majority of producers worldwide use no cleaning equipment whatsoever because of the cost and the nasty compounds know no borders.

We converted to unleaded fuel some time back but only recently was the fuel production process modified to reduce the sulphur content. Prior to that improvement there was a distinctive hydrogen sulphide smell from any vehicle running on unleaded fuel as standard catalytic converters have little effect on it.

Land based vehicular exhaust products would have to be the biggest culprit by far, followed by industry and thermal energy production. All need to be attacked if any noticeable improvement can be expected.

reply to post by Pilgrum



Right, there are other pollution issues to be addressed but this thread is about the "pollution" in jet plane exhaust.

reply to post by interestedalways


Absolutely

I'm just curious as to how much of that pollution being exhausted by jet engines is a product of airborne contaminants from sources other than the fuel they burn.

This is why more airlines have to jump on the bandwagon being driven by Vrigin founder Richard Branson and start using biofuel in jets. Now although he has only had one test flight, it's a start.

All the other airlines are poo pooing his idea as they say it's not sustainable. That is something that a person or corporation who are in the back pockets of the oil industry would say though.

The first flight by a commercial airline to be powered partly by biofuel has taken place.

A Virgin Atlantic jumbo jet has flown between London's Heathrow and Amsterdam using fuel derived from a mixture of Brazilian babassu nuts and coconuts.

From Here

That was the crowning moment when I knew "Global Warming is a Fraud"
Airliners - bring heavy compounds up into the atmosphere where they dont belong. If Global Warming was serious, Airliners would be grounded.