What is the thin outer layer of the trophosphere that marks the boundary between the trophosphere and stratosphere?

The thin outer layer of the troposphere that marks the boundary between the troposphere and the stratosphere is called the tropopause. It acts as a transition zone, where temperature stops decreasing with altitude and begins to increase in the stratosphere. The altitude of the tropopause varies with latitude and weather conditions, typically being higher in the tropics and lower in polar regions. This boundary plays a crucial role in weather patterns and the behavior of atmospheric phenomena.