The last flight I took was awful. It from Minnesota to New York, despite it appearing to be a pretty clear night. This went against , which I always associated with a cloudy flight. But apparently, we’re now living through a boom in something called “clear-air turbulence,” which as the planet warms.

The phenomenon isn’t new and is caused by patches of perfectly clear air that are swirling through the world’s jetstreams, which are regularly flowing currents of air that most aircraft follow to increase efficiency and decrease travel times. When the swirling air meets the more uniform air in the jetstream, it causes a hot mess that .

According to , the problem is being exacerbated by climate change. But, we didn’t read that whole report and instead watched a TikTok about clear-air turbulence. Because, young people.

In the clip, which was shared earlier this week, Scientific American explained that the turbulence occurs when winds traveling at different speeds and in different directions meet. When this happens, something called wind sheer occurs and that can .

Because this type of turbulence often occurs on a perfectly clear day, and pilots to predict when it might hit. This is why you might hear your captain announce over the tannoy that they are dropping down or climbing up to find a patch of smoother air to fly in.

According to Scientific America, the incidence of this kind of turbulence is on the rise, as those erratic currents of air are much more common in extreme temperatures. In fact some models predict that as the planet warms, incidents of clear-air turbulence could be about to rise by as much as 100 to 200 percent over the next 30 to 60 years.

So, now you know what’s shaking the plane when you can’t see a cloud in the sky. The more you know.