|The troposphere is the layer closest to
the Earth, approximately 11km high. Weather occurs only in the troposphere because it is
this layer that contains most of the water vapour. Weather is the way water changes in the
air, and so without water there would be no clouds, rain, snow or other weather features.
|The troposphere is an unstable layer where the air is constantly moving. As a result, aircraft flying through the troposphere may have a very bumpy ride – what we know as turbulence. You may have experienced this when flying before! Because of this turbulence, most jet airlines fly higher above the Earth in the stratosphere. Here the air is more still and clear as they can fly above the clouds.|