2023-05-08 14:00:00
Surely you have a friend who on some occasion, looking at the sky, has raised their finger towards the wake of an airplane to tell you that what you are seeing is a chemtrail.
the english word chemtrail comes from the abbreviation of English voices Chemical y trailwhich are literally translated into Spanish as chemtrail and some people claim that they are part of a secret plan that aims to change the weather, cause disease, birth control or outright wipe out humanity.
17% of the people surveyed said they believed in the existence of a Large-Scale Secret Atmospheric Program
However, who is referring to the chemtrailsit is doing it to the trails left by the planes, to use an English term in the same way, what we would call a contrail or condensation cloud that are nothing more than linear clouds produced by aircraft engine exhaust or changes in air pressureusually at cruising altitudes of several kilometers above the Earth’s surface.
A secret weather control program
In an international survey carried out a few years ago, in 2011, almost 17% of the people asked said they believed in the existence of a Large Scale Secret Atmospheric Program –SLAP by its acronym in English – which is commonly known covert geoengineeringand which has given rise to the belief and claim to show scientific evidence of widespread chemical spraying linked to negative impacts on human health or the environment.
It is, as it happens with other phenomena that defend assumptions such as that vaccines are harmful to health, or that the Earth is flat, a hoax without scientific foundation. In fact, the hoax has grown so much in recent years that already in 2016, two researchers Christine Shearer y Steven J. Davisfrom University of Californiathey launched to carry out a survey among scientists on the veracity of the arguments put forward by the conspiracists about this type of stelae.
The resulting article, titled Quantifying expert consensus against the existence of a secret, large-scale atmospheric spraying program was published in the specialized magazine Enviromental Reseach Letters, and concluded that 76 of the 77 experts surveyeds -98.7%-, among whom were chemists, physicists or meteorologists, they had found no evidence to support the conspiracy’s claims. In fact, the data cited as evidence by them could be perfectly explained by well-known chemical or physical phenomena associated with aircraft contrails and atmospheric aerosols.
What exactly are chemtrails
Contrails are line-shaped clouds composed of ice particles that are visible behind jet aircraft engines and generally form at cruising altitudes in the upper atmosphere. Contrails have been a normal occurrence of jet aviation since its early days. Depending on the temperature and the amount of humidity in the air, these contrails evaporate quickly -if the humidity is low- or persist and grow, otherwise, if the ambient humidity is more pronounced. In fact, jet engine exhaust from aircraft provides only a small portion of the ice-forming water in persistent contrails, which are composed primarily of water naturally present in the atmosphere along the trajectory. airplane flight.
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The chemistry of contrails
Aircraft engines emit water vapor, carbon dioxide, and small amounts of nitrogen oxides (NOx). Also hydrocarbons, carbon monoxide, sulfur gases, and soot and metal particles formed by the high-temperature combustion of jet fuel during flight. But Actually, among all these gases emitted, only water vapor is needed for the formation of a condensation trail. Sulfur gases are also of potential interest, as they lead to the formation of small particles. All other engine emissions are considered non-essential for contrail formation.
How are contrails formed?
For a contrail to form, the right conditions must exist immediately behind a jet engine. A contrail will form if, as the exhaust gases cool and mix with the surrounding air, the humidity increases or the temperature drops enough for liquid water condensation to occur. The humidity level achieved depends on the amount of water and the temperature both in the surrounding air and immediately behind the exhaust.
More weather problems ahead
The atmospheric temperature and humidity at any given location undergo natural daily and seasonal variations and are therefore not always suitable for contrail formation. If enough moisture is produced in the exhaust column, the water condenses on the particles to form liquid droplets. As the exhaust air cools due to mixing with local cold air, the newly formed droplets quickly freeze into ice particles that form a contrail.
THE LIFE EXPECTANCY OF A TRAIL OF CONDENSATION
After the initial formation of ice, A contrail can evolve in 2 different ways depending on the surrounding humidity.
If this is low, the wake will have a short life. The newly formed ice particles will rapidly evaporate as the exhaust gases fully mix into the surrounding atmosphere. The resulting contrail line will extend only a short distance behind the aircraft.
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On the contrary, if the humidity is high, the wake will be persistent. The newly formed ice particles will continue to grow in size by taking in water from the surrounding atmosphere. In these cases, the resulting contrails can extend great distances behind an aircraft. They can also last for hours while growing up to several kilometers wide and up to 200 and 400 meters high. This is because contrails propagate due to air turbulence created by passing aircraft, differences in wind speeds, and the effects of solar heating.
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