What is flight turbulence and why does it happen?

Washington: Airplane turbulence, which led to the death of a passenger on a Singapore Airlines flight on Tuesday, is a complex phenomenon that is beco...

Washington: Airplane turbulence, which led to the death of a passenger on a Singapore Airlines flight on Tuesday, is a complex phenomenon that is becoming increasingly common due to climate change, according to experts.

Storms, cold and warm fronts, and the movement of air around mountains can all cause turbulence in the air that planes fly through.

Turbulence can also occur in jet streams -- highways of strong wind that circulate around the globe at certain latitudes.

"While meteorologists have excellent tools to forecast turbulence, they are not perfect," said Thomas Guinn, professor in the aviation department at the Embry-Riddle Aeronautical University in Florida.

He added that airplane passengers should make sure they are wearing seat belts, which makes injuries far less likely.