What term describes currents that suddenly appear and disappear?

Transitory currents are defined as currents that appear and disappear unexpectedly, often influenced by factors like tides, weather changes, and underwater topography. These currents can create sudden changes in water movement, posing challenges for divers who may be caught off-guard by their presence or strength.

In contrast, the other types of currents mentioned, such as steady currents, are consistent and predictable in their flow, while persistent currents continue over a longer duration. Pulsating currents, though they may sound similar, typically imply variations in intensity rather than the sporadic nature that characterizes transitory currents. Hence, transitory currents specifically refer to the unpredictable and sudden behavior, making it the most accurate term for this phenomenon.