Rare earozoru in the sky above US

Last Thursday, December 14, specialist clouds Bastian van Geenhoven noticed curious patterns in the sky over Florida. White stripes, captured by NASA satellite "Aqua" in the natural and false colors, was left by the aircraft.

"This is exactly the contrails of the aircraft. These images are not typical for the atmosphere," said van Geenhoven.

Condensation (or the inverse) are a type of Cirrus clouds, which are formed almost the same as in nature. The difference lies in the source of ingredients. The exhausts of aircraft contain an abundance of water vapor and small particles. At high altitudes, where it is quite cold — about minus 39 °C — water vapor can easily freeze the particles and form a long narrow cloud.

The blue areas in the second image indicate the ice, which is consistent with an icy composition of the contrail. When the temperature and humidity allow the ice crystals to remain solid, Cirrus clouds can persist for about an hour and moved with the winds. In this case, a relatively long period of existence, the unique shape and isolation circuits have improved their visibility from space.

"It's not uncommon, but usually they are difficult to detect, explained van Geenhoven. Often the aircraft has to roll around to wait for opportunities to land at the nearest airport. Probably, these drawings are also difficult to detect due to the intense air traffic and any overlapping contours when air conditions are conducive to creating contrails".

Another example of contrails were seen in March 2016, when the semi-circles were visible in the sky off the East coast of England. Van Geenhoven have determined that their source was the aircraft of the Royal air force of great Britain, which, he believes, could do a research flight.

Translated by «Yandex.Translator»