What are the contraile?
It is a condensing trail that is created and left when the current moves with cold air with low steam pressure. At high altitudes, temperatures are sufficiently cold that only a small amount of humidity is needed to create condensation. The jet exhaust brings this humidity in hot and humid air. Turbulence also created using current exhaust mixtures that hot air with colder air in the atmosphere, resulting in condensation. It is the same process that creates a "cloud" when the warm breath is exhaled on a cold day.
Contrails were first observed during the First World War, but until World War II became a problem - for two reasons. First, they allowed to detect the plane and, second, sometimes it prevents visibility so badly that it was not possible for pilots to keep sight of enemy aircraft during the fight. Today, due to increased air traffic in the last half -century, contrails have been observed in almost every area of the world.
are madeNY from Kondentased liquid, so contrails remains in areas with higher humidity longer than in the dry sky. In fact, it is not at all if the atmosphere is too dry. Sailors sometimes follow these patterns to make educated weather forecasts. If they are invisible or disappear quickly, it indicates dry air and stable weather patterns. In the days when they persist, higher humidity and lower atmospheric stability are likely, so the weather changes may occur.
If the room has long enough, they can spread in the sky and create what is equal to a person caused by clouds. Scientists and environmentalists share concerns about the effects that it may have on the climate of the Earth because some estimates report up to 20% increase in cloud coverage in areas of heavy air traffic. These other clouding roofing acts as Cirrus clouds that reflect incoming sunlight and inhibit thermalThose planets. Tom can also change the balance between sunlight and infrared energy in the atmosphere. In the US in the US, the research project National Aviation and Universe (NASA) and the Ministry of Energy (Doe) are sponsored to study an impact that has atmospheric chemistry, weather and climate, and other studies are underway to explore jet exhaust gases and the upper troposphere chemistry.
There is speculation that some contrails are part of government conspiracy. It is proposed that for non -published purposes, the conventional populations are used by chemical or biological agents. Governments around the world deny these accusations and remain unfounded.