What is an isothermal layer?

An isothermal layer is characterized by a consistent temperature at a specific height in the atmosphere. This means that within this layer, there is no change in temperature as altitude increases. Such layers can be important in meteorological studies because they can affect the stability of the atmosphere and influence weather patterns. For example, when an isothermal layer is present, it can trap pollutants or moisture beneath it, leading to the formation of fog or haze.

While other options discuss different atmospheric phenomena, they do not accurately represent the concept of an isothermal layer. The other choices refer to varying temperature changes, humidity and wind conditions, or extreme weather phenomena, which are not defining characteristics of an isothermal layer. Understanding the nature of these layers is essential for pilots and meteorologists, as they can impact flight operations and local weather.