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Originally posted by the animator
ide just like to add that my dad was an air engineer & pointed out to me that aircraft are only allowed to land with a certain amount of fuel on board. so high altitude contrails normaly behind the engines. & jets are only glorified crop sprayers.
also watch some big aircraft as they approach the airport, on things like 747 kinda size they all dump fuel from there wing tips wich i think tends to look more chemtrail rather than contrail.
every airplane dumping fuel all over the world is a lot dumped polution.
Originally posted by Lunchman
And for the guy who said, look at how they converge on the major cities.. Lmao, thats good.. Thankfully Americans are stupid and don't know their cities locations are so posting such idea's isn't slammed like it should be.. but its obvious they don't head to a "hub" city...
It has been the world's busiest airport by passenger traffic as well as landings and take-offs. Additionally, Delta Air Lines operates the world's largest airline hub from the airport. AirTran Airways also operates their largest hub from the airport. Hartsfield held its ranking as the world's busiest airport in 2006, both in terms of passengers and number of flights, by accommodating 84.8 million passengers and 976,447 flights respectively. Many of these flights are domestic flights from within the United States where Atlanta serves as a major transfer point for flights to and from smaller cities throughout the Southern United States. Fifty-seven percent of Hartsfield-Jackson's airport passengers do not stay in Atlanta but go on connection flights elsewhere. As an international gateway to the United States, Hartsfield-Jackson ranks seventh; JFK International in New York City is first.
· Airline hub, an airport that serves as the base of operations for an airline
Originally posted by defcon5
All combustion engines have exhaust, but that is not what you are seeing as a trail in the sky. The formations that folks call chemtrails are actually frozen water vapor from the hot engine working in a cold environment. It’s the same thing as what comes out of the back of your car on a cold morning; the difference being in the persistence of that cloud. In the atmosphere, depending on the temperature and humidity, those vapor trails can persist and become normal cloud cover.
The reason why I can confidently say that these are normal contrails in the photo above, is simply due to location in proximity to airports. Meaning these are contrails coming from normal commercial airliners, such as those I have personally worked on. You will hear Chemtrail believer’s state that they know what a normal contrail looks like, and that they cannot persist, but this has been proven untrue. Photos of persistent contrails dating back to WWII are easy to show as evidence that persistent contrails have existed as long as aircraft have. The reason for the increase in contrails over the last two decades is simply due to increased aircraft numbers, and newer high-by-pass turbo fan engines pulling in more air and running at higher temperatures.
Originally posted by sir_chan
According to NOAA meteorologist Thomas Schlatter, quoted in the article
WeatherWise Article - Thomas Schlatter - NOAA meteorologist:
Before visiting Web sites concerning "chemtrails," I assumed that "chemtrails" was a new name given to contrails by environmentally conscious people who are concerned that subsonic jet traffic injects water vapor, carbon dioxide, other gases, and soot into the atmosphere at high altitudes. These substances can alter the chemistry and radiative properties of the atmosphere, the high-altitude cloudiness, and perhaps even the regional climate. I was very wrong. In visiting these sites, I learned that chemtrails is the name given to sky tracks left by the deliberate release, either by spraying or mixing with jet fuel, of substances not found in "ordinary" contrails. The releases are allegedly occurring in many countries without the knowledge or consent of the populace, and they are being blamed for respiratory and other health problems.
I consider these claims unfounded. There is no evidence in the meteorological literature or photographs on these web pages to support them. I will summarize what is known about contrails (last treated in the August 1981 issue of Weatherwise), discuss some of the hallmarks that are supposed to distinguish chemtrails from contrails, and list some of the potential hazards of jet exhaust at flight altitudes.
Natural cirrus clouds form high in the troposphere, usually at temperatures below -40 degrees F, when there are sufficient ice nuclei (tiny particles that ice crystals can grow on) in the air and when the water vapor content is high enough. Upward motion in the high troposphere causes the cooling that brings air to saturation and forms the ice crystals in natural cirrus clouds. Contrails (an abbreviation of condensation trails) form when jet aircraft inject water vapor into the high troposphere or lower stratosphere, thereby bringing the air to saturation.
During this year, aircraft will burn over 200 million tons of fuel. The major byproducts of combustion are carbon dioxide (CO2) and water vapor (H2O). There are other substances in the engine exhaust, notably, carbon monoxide, oxides of nitrogen, sulphur dioxide, methane, nonmethane hydrocarbons, carbon soot, and other microscopic particles.
For every pound of fuel burned, about 1.26 pounds of water vapor is created but less than 0.0004 ounces of soot because aviation fuel burns cleanly. Even so, the soot provides plenty of ice nuclei, and the water vapor can usually saturate a large volume of air at the low temperatures where commercial jets fly. The result is the immediate formation of a contrail, consisting of tiny ice crystals in large concentrations. At temperatures lower than about -76 degrees F, contrails almost always form, regardless of relative humidity. The higher the ambient temperature, the less likely that contrails will form. At temperatures above -40 degrees F, contrails are not expected. The persistence of contrails depends upon temperature, relative humidity, and the vigor of mixing between the exhaust plume and the ambient air. At low temperatures, with high humidity, and with stable temperature stratification (which inhibits vertical mixing of the air), contrails persist for many hours.
Below are some misconceptions about contrails taken from Web sites. After each, I describe why they are misguided.
Originally posted by sir_chanPlease read it because you are very good at "sounding" like you know what your talking about.
Originally posted by sir_chan
And those pictures of low altitude crop dusting are NOTHING even close to chemtrails. Oranges and Apples. Just how I see it man.
well i do kinda agree with what your saying, however intentional spraying from a plane for purposes other than crop dusting as suspicious.. why would a plane fly very high and be dumping chemicals?
cloud did not dissipate like a regular contrail.. im not claiming it was a secret military job from RAAF Edinburgh (which is ~20km away) but it certainly made me think of chemtrails due to it lingering for a very long time and not dissipating.
of course large aircraft do dump fuel before landing to lighten their load after a long flight (eg 747 and such) which could also be described as a chem trail but like you say, its a normal procedure for safe landings.
that reminds me actually, the other day i seen a plane fly very high from the adelaide hills, over adelaide and beyond the beach (east to west) and it left a trail starting at the hills and continuing all the way over the beach where it stopped abruptly.
hemtrails are real. But they are not what you think they are. Regular jet contrails disapate. Chemtrails stay long enough to show up as a criss-crossing grid pattern.
Chemtrails stay long enough to show up as a criss-crossing grid pattern.
this water vapor that freezes and turns into contrails.) Chemtrails usually occur at altitudes between 25,000 and 30,000 feet, which is usually too low and warm to support contrails."
www.newciv.org... Read this Article!!!
Unfortunately the real problem is that these days people are so conditioned, that the simply forget about the concept of their OWN past, and get sucked in into the “fact bending” game.
Just use your own memories, and try to remember if you remember seeing “persistent contrails” from your past.
Originally posted by AmethystSD
Regular jet contrails disapate. Chemtrails stay long enough to show up as a criss-crossing grid pattern.
After much research, I concluded that when people are seeing and calling chemtrails are actually cloud seeding.
One aspect of weather pollution in the atmosphere is the generation of contrails. The spreading out of jet contrails into extensive cirrus sheets is a familiar sight. Often, when persistent conditions exist from 25,000 to 40,000 ft, several long contrails increase in number and gradually merge into an almost solid interlaced sheet
Originally posted by iskander
I guarantee that nobody will find a checkered pattern persistent contrail in ANY of the footage shot prior to 1990s.
Originally posted by lee anoma
You familiar with the concept of hiding something in plain sight?
Since we can't go up and analyze every streak in the sky and since they can be viewed as merely contrails then in that sense hiding massive evidence of a chemical trail(s) would not be that difficult at all.
Originally posted by JimmyCarterIsSmarter
The government doesn't need to have an 'official story' on what 'Chemtrails' are, as they are ACTUALLY normal, everyday, persistant contrails Contrails caused by high flying aircraft.
If you want to prove this wrong, then you may as well start by answering the following question.
Why can't Contrails persist and fan out into clouds?
Originally posted by sharplee
they do fan out into clouds. look at the sky. i can't do all your research.
One unique type of cloud is manmade. Contrails occur when exhaust from jet engines condenses. A narrow line of moisture makes up the contrail. Winds eventually dissipate it; in some instances conditions permit the contrail to survive for many minutes (their straight lines do distort). Contrails are believed to affect weather by raising both short and long-term temperatures (one estimate is for about a third of a degree per decade). Here is a MODIS image taken over the southeast U.S. on January 29, 2004 showing a large number of contrails (at times more than 2000 planes are over the North American continent at any one time):
The condensation trails (contrails) that form in the wake of high-flying jets are another interesting example. These cylindrical clouds have variable lifetimes and water concentrations depending on environmental conditions. In some cases the contrails can persist for many minutes. But they do slowly diffuse, much like the smoke plume emitted by an acrobatic aircraft
Minnus said that contrails are formed in air below -39 Celsius when the air is supersaturated with ice.
Due to the physical structure of ice, the humidity level actually has to be higher, about 150 percent humidity level, than it would be for the air to be supersaturated with water.
"The exhaust (jet engine) injects a lot of water into the air," Minnus said.
"The water droplets immediately freeze and you wind up with a contrail."
Minnus said once the contrail is formed in supersaturated air, larger ice particles become nuclei and begin to grow, collecting other ice particles from the surrounding air.
Contrail formation typically occurs in the upper Troposphere between nine and twelve kilometers is height with temperatures ranging between -35ƒC and -55ƒC (Jensen e. al. 1998, Schrader 1997). Most contrails last on the order of seconds to a few minutes and only a small minority will last for hours as in the contrails photographed (Jensen et. al. 1998). A newly formed contrail will be approximately one kilometer wide and one-half a kilometer tall. As a contrail evolves, it grows greatly in the horizontal plane sometimes extending over 20 kilometers in width (Spinhirne et al. 1998). Examples of this horizontal evolution is shown in the photograph. Contrails can also be 100ís of kilometers long given the right atmospheric conditions and a plane on a steady course.
Long lasting contrails like the ones observed usually occur in parts of the sky that have preexisting patches of cirrus clouds. Since the cirrus clouds are formed of ice crystals like the contrails, cirrus clouds in a region of the sky suggests supersaturation with respect to ice and sufficient heterogeneous nuclei for ice crystals to form (Jenson et al. 1998). The GOES-8 satellite photographs, Figure 3 and Figure 4, taken at approximately at the same time as the contrails were present shows significant cirrus clouds around the Norman area providing a condition necessary for contrail persistence.
Keeping these caveats in mind, the following major results have been obtained from the model simulations described in this paper.
* Long-lived contrails cannot be explained by the amount of water emitted by the aircraft. Although we have not performed a simulation in an atmosphere that is subsaturated with respect to ice, it is quite obvious (in comparing results from runs 3 and 8) that persistent contrails can only form in an atmosphere that is supersaturated with respect to ice.
Contrails are linear cloud features comprised primarily of ice crystals that are produced from the emission of water vapor and particulates from jet aircraft exhaust into ambient air. Contrails form as a result of the relatively warm aircraft exhausts mixing with the cold ambient air of the middle and upper troposphere. Since most aircraft cruise at altitudes of between 10 and 13 km (typically the 300–100-mb layer), the temperature at contrail level is typically -40°C or colder (Beckwith 1972; Gayet et al. 1996). As a result, most water droplets are thought to freeze spontaneously after contrail formation (Pilie and Jiusto 1958; Boin and Levkov 1994). Once a contrail is produced it typically will last only a short time if the ambient humidity is low, and may never be evident from ground level. Only during a unique range of favorable conditions will contrails persist and spread, both horizontally and vertically, producing a cloudlike sky.
Although temperature and moisture are clearly important controls in contrail persistence and growth, the specific ranges of necessary conditions are not well understood. This isprimarily a result of the lack of sufficient observations for contrail-forming environments and the inability to obtain reliable moisture measurements from rawinsonde data at contrail altitudes. For this reason, much of the previous research directed toward predicting contrail development has not utilized empirical temperature and moisture observations but instead relied mainly on physically based models that could not always be verified (Appleman 1953; Scorer and Davenport 1970; Hanson and Hanson 1995).
To persist, contrails and cirrus require RHI > 100%. Because of negative biases in the relative humidity measured at cold temperatures (Miloshevich et al. 1999), RHI infrequently exceeds 100% in
the USA radiosonde record. Furthermore, the RUC model adjusts and smoothes the RHI field so that it differs from the radiosonde measurements. While the older version of the RUC used here (discontinued 18 April 2002) yields RHI > 100% more often than the radiosondes, it is still biased
low. Thus, it is necessary to increase the RHI from radiosonde measurements for T < 0°C or set an artificially low value of RHIt.
The threshold was determined by comparing the RUC RHI fields to satellite images of contrail and cirrus distributions using the RUC level having the greatest RHI values in the 150-350 hPa range. Figure 1 shows an example of contrails forming in heavy air traffic over the northeastern USA
during 18 November 2001. The leading line of contrails in the Terra MODIS 11-12 µm brightness temperature difference image is located in east central Pennsylvania and New York (Fig. 1a). Contrails and cirrus cover most of the image west of that line. Comparison of the 225-hPa RHI contours
(Fig. 1b) with the contrails indicate that few contrails formed over areas with RHI < 80%. This value is slightly less than the 85% found by Duda et al. (2003) for a different day. Comparison of the isolated contrails from 12 September yield a different threshold as expected since the RUC alters
the humidity field from the measured values as noted earlier. Figure 2a shows a single, but broken linear contrail over Ohio and Pennsylvania at 1108 UTC, 12 September 2001. Cirrus clouds are evident
in northern and southern Ohio as well as northeastern Pennsylvania.
The values of RHI at 225 hPa (~12 km) plotted in
Fig. 4 show one supersaturated area over central OH
and Indiana at 1200 UTC and no areas at 1600 UTC.
Over PA, RHI ranges from 90% at the OH border to
50% at the eastern PA border. Over Pittsburgh (PIT)
underneath contrail A at 1200 UTC, the RUC RHI is
80%, while near Aberdeen, MD (ABD), close to C at
1200 UTC, RHI = 55%. A similar value is found over
Dulles, VA (IAD) near contrail D, while RHI = 80% over
Blacksburg, VA (BLK) near the end of E. These values
are too low for sustaining contrails. To determine if
these values are due to the model assimilation process,
the rawinsonde RHI profiles are compared with the
corresponding RUC values at 1200 UTC. in Fig. 5. The
RUC increased RHI at most levels over BLK and PIT
while smoothing or decreasing RHI over ABD and IAD.
No contrails were observed for RHI < 55%.