"Atmosphere" redirects here.
The 'atmolayer' is a series of layers of gases above inhabited part of the earth. Therefore, 'atmolayer' is the Flat Earth term for the Round Earth atmosphere. However, the terms 'atmosphere', 'atmoplane', and 'atmosplane' are all alternative names of the same thing.
Ice Wall Containment
The atmolayer must be contained by a barrier on finite Earth models of the theory to prevent the various gasses from flowing out into space. One model (now widely discredited) describes that the Ice Wall is tall enough to hold in the atmolayer, like the edges of a bowl.
Also see: Atmolayer Lip Hypothesis
Dark Energy Field
An alternative theory says that the atmolayer is held in by a complex reaction to the streams of Dark Energy at the edge of the world. This creates a "boundary" containment.
The Dark Energy Field is a vector field. It has a gradient that is smallest at the interaction of the atmosphere and the field, called the boundary layer. The DEF interacts with the magnetic field of the earth at this boundary layer. These vectors produce a force vector that is orthogonal to the other vectors in four dimensional space. This force vector is always normal to the boundary layer, thus providing a type of forced containment for the atmosphere.
The Atmolayer consists of the following sub-layers
Tropolayer - Up to 18km
Stratolayer - Up to 50km
Mesolayer - Up to 90km
Ionolayer - about 480 km