6016 x 4000 px | 50,9 x 33,9 cm | 20,1 x 13,3 inches | 300dpi
Data acquisizione:
2016
Ubicazione:
Huyton, Knowsley, Liverpool, Merseyside, England, UK
Altre informazioni:
Almost daily, aircraft (often non-commercial) leave persistent trails that spread and block out essential sunlight. Vapour trail, also called Condensation Trail, orContrail, vapour trail, streamer of cloud sometimes observed behind an airplane flying in clear, cold, humid air. It forms upon condensation of the water vapour produced by the combustion of fuel in the airplane engines. When the ambient relative humidity is high, the resulting ice-crystal plume may last for several hours. The trail may be distorted by the winds, and sometimes it spreads outwards to form a layer of cirrus cloud. On rare occasions, when the air is nearly saturated with water vapour, air circulation at the wing tips of an airplane may cause sufficient pressure and temperature reductions to cause cloud streamers to form. Contrails (/ˈkɒntreɪlz/; short for "condensation trails") or vapor trails are line-shaped clouds sometimes produced by aircraft engine exhaust, typically at aircraft cruise altitudes several miles above the Earth’s surface. Contrails are composed primarily of water, in the form of ice crystals. The combination of water vapor in aircraft engine exhaust and the low ambient temperatures that often exists at these high altitudes allows the formation of the trails. vapor, vapour trails, chemtrails, chemtrail,
