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Amazing contrails in Guangzhou became a hit on social media
Update: 2019-01-22     Source: newsgd.com

At nightfall of January 17, the amazing contrail sunset in Guangzhou drew many netizens' attention and they shared the pictures on WeChat moments and Weibo. [Photo / Nanfang Plus]

According to the Guangdong Meteorological Observatory, contrails are line-shaped clouds produced by aircraft engine exhaust or changes in air pressure, typically at aircraft cruise altitudes several miles above the Earth's surface.

They are composed mainly of water, in the form of ice crystals. The combination of water vapor in aircraft engine exhaust and the low ambient temperatures that exist at high altitudes allows the formation of the trails.

It is said that the contrail normally looks white, but it can be colorful as the water vapor reflects the sun in different angles.


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