Contrails (/ ˈ k ɒ n t r eɪ l z /; short for "condensation trails") or vapor trails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at aircraft cruising altitudes several kilometres/miles above the Earth's surface. They are composed primarily of water, in the form of ice crystals.

2023年8月27日 · Condensation trails, or contrails, are long, thin clouds that can form behind airplanes at cruising altitude. They are created by jet engines.

2025年1月16日 · Contrails are cloud-like formations made up of tiny water droplets or ice crystals. They form when the hot exhaust gases from an aircraft’s engine, which contains water vapor, meet the cooler, low-pressure air at high altitudes.

2019年7月4日 · Do you know the difference between a chemtrail and a contrail? A contrail is an abbreviation for " condensation trail," which is a visible white vapor trail produced as water vapor condenses from aircraft engine exhaust. Contrails consist of water vapor or tiny ice crystals.

2001年11月19日 · Jets leave white trails, or contrails, in their wakes for the same reason you can sometimes see your breath. The hot, humid exhaust from jet engines mixes with the atmosphere, which at high...

A condensation trail, or “contrail,” is a streamer of cloud sometimes observed behind an airplane. Learn more about where contrails come from.

2025年1月7日 · Contrails, the wispy white streaks that sometimes form behind aircraft, have long been a subject of interest – sparking debates about their environmental impact, their role in climate change, and even fuelling conspiracy theories.

2024年9月2日 · Contrails, short for condensation trails, form when the hot, moist exhaust from an airplane’s engine meets the cold, low-pressure atmosphere at high altitudes.

2025年1月14日 · contrail, streamer of cloud sometimes observed behind an airplane flying in clear cold humid air. A contrail forms when water vapour produced by the combustion of fuel in airplane engines condenses upon soot particles or sulfur aerosols in the plane’s exhaust.

2024年12月20日 · Contrails are trails of condensed water vapor created by aircraft exhaust in the upper atmosphere. Contrails form under specific atmospheric conditions and persist for varying durations. The formation of contrails involves factors, …