What atmospheric layer is influenced by friction?

The atmospheric layer most influenced by friction is the troposphere. This layer is the lowest part of the atmosphere and is where most of the weather phenomena occur. Friction plays a significant role in the troposphere, particularly near the Earth's surface, affecting wind patterns and the movement of air masses.

As air moves over the surface, various features such as trees, buildings, and terrain cause a resistance that slows down the wind; this is what we refer to as friction. The impact of friction is most pronounced in the boundary layer of the troposphere, where turbulence is generated, leading to changes in wind direction and speed. In contrast, the stratosphere and mesosphere, which are situated above the troposphere, are less affected by surface friction due to their greater altitudes and the more stable atmospheric conditions present there.

While there is no officially recognized friction layer, the concept reflects how frictional forces are especially relevant in the context of the troposphere, contrasting with the other layers where such effects are minimal.