Timeseries: correlation - Hysteresis (image 2)

Animation showing changes in stream temperature relative to air temperature over the course of a day. The animation begins at midnight, adding a point at each half-hour interval. After dawn, as air temperature starts warming, the stream warms more slowly than air, and water temperature lags behind air temperature. Similarly, in the evening, the stream cools more slowly than the air. Over the course of the day, the points form a figure eight shape.