Contrails are a major factor in aviation's contribution to climate change, but a UK company is trying to prevent much of the impact by slightly changing the path of certain flights.
On a clear day, with the right weather conditions, a portion of the sky busy with commercial flights can become riddled with contrails, the wispy ice clouds that form as jet aircraft fly by.
And yet, the problem may have an apparently straightforward solution. Contrails -- short for condensation trails, which form when water vapor condenses into ice crystals around the small particles emitted by jet engines -- require cold and humid atmospheric conditions, and don't always stay around for long. Researchers say that by targeting specific flights that have a high chance of producing contrails, and varying their flight path ever so slightly, much of the damage could be prevented.
Durant has long studied how atmospheric contaminants affect the health of aircraft engines, and after thebrought aviation to a standstill, he embarked on a project with Airbus and easyJet to research volcanic ash. In 2013 he founded his own company, Satavia, initially focusing on preserving engines from damaging pollutants like dust, ice and volcanic ash."Then, Covid shifted the priorities of the whole industry towards sustainability," he says.
"The airlines go ahead and make flight plans as they normally do. But in parallel to that, we analyze their schedule and look at a number of flow trajectories for every single flight," Durant says."We end up with a long list of flights of which the top 5% or so have these heavy hitter, long-lived warming contrails. And then we work closely with the flight ops department in the airline to target those.
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