The Economic Times

In August 1988, researchers released green and red dyes into a Canadian lake to uncover its hidden circulation; wind at the surface was driving water in different directions below

In an intriguing experiment conducted at Twin West Lake, scientists employed dyes to reveal the intricate hidden currents. They discovered that the wind created distinct layered circulation patterns rather than just a straightforward surface flow. While the wind-driven surface water moved in one direction, the deeper currents surprisingly flowed in the opposite direction.