Asked by: Rod Lennox, Colchester
Bound to the Earth by gravity, most of the atmosphere spins along with it as a result of friction with the ground and the viscosity or ‘stickiness’ of the different layers of air above it.
Above 200km, however, the incredibly thin atmosphere actually spins faster than the Earth. The cause of this bizarre ‘super-rotation’ effect remains unclear, but has also been detected on Venus.
Read more:
- How much does Earth’s atmosphere weigh?
- Why doesn’t Earth’s atmosphere vanish into the vacuum of space?
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
Authors
Robert is a science writer and visiting professor of science at Aston University.
