When the air humidity is heated by a jet engine and then cooled, ice crystals are formed, which we consider white contrails. (Photo: Getty Images / iStockphoto)

The more we fly, the worse it gets.

Contrails, the white bands that remain in the sky, will increase global warming over the next few decades. According to a new study released on Thursday, the impact of contrails on climate change is expected to triple by 2050. Contrails heat the atmosphere, said study leader Lisa Bock, a researcher at the German Aerospace Center, as they can dwell as cirrus clouds in the sky and capture the heat in the earth's atmosphere.

"Under the right conditions, contrails can persist for extended periods of time and sometimes develop into a complete cirrus layer," said the National Meteorological Service.

According to the study, the increase in contrails is due to the predicted air traffic growth, which is expected to be four times higher in 2050 than in 2006, and to a slight shift of air routes to higher elevations, which favors contrails in the tropics , Contamination effects due to contrails are likely to be strongest in North America and Europe, the world's busiest air transport areas, but will also increase significantly in Asia.

Bock said that "in terms of overall climate change, there are still some uncertainties about Contrail Cirrus, and in particular its effects on surface temperatures, because Contrail Cirrus itself and its surface effects are ongoing research topics, but it is clear that they warm the atmosphere . "

Short for contrails, contrails are clouds formed by the heat of jet engines and then frozen by cold temperatures outside the jet. How much moisture is in the air determines when contrails are visible and when they form.

Contrails are not harmful, though conspiracy theorists call them "chemtrails" and claim planes spray toxic chemicals from aircraft.

The study has been published in the journal Atmospheric Chemistry and Physics, a publication of the European Geosciences Union / 27 / contrail aggravating-the-global-warming-says-study / 1573689001 /