What is a thermocline in the context of diving?

A thermocline refers to a layer within a body of water in which there is a rapid change in temperature with depth. This phenomenon is significant in diving because it can affect a diver's experience and safety. When divers descend through the thermocline, they may encounter a noticeable shift in water temperature, which can lead to thermal discomfort and impact buoyancy and gear performance.

Understanding the thermocline is essential for divers as it can influence visibility, the distribution of marine life, and the overall thermal environment underwater. The presence of a thermocline may also mean that divers need to adjust their exposure protection to cope with these varying temperatures effectively.