What does 'ambient pressure' refer to in diving?

Ambient pressure refers to the pressure exerted by the surrounding water environment on a diver. As a diver descends deeper into the water, the ambient pressure increases due to the weight of the water above them. This pressure is a critical factor in diving because it affects various physiological processes, such as the behavior of gases within the body and the lungs. Understanding ambient pressure is essential for managing issues such as decompression sickness and gas absorption, which can occur due to the changes in pressure at different depths. Therefore, comprehending the concept of ambient pressure is fundamental for the safety and effectiveness of diving practices.