Related news story: Will a well-mixed, warmer lake doom invasive fish?

Caption: Jordan Read, a doctoral candidate in civil and environmental engineering, explains the mechanics of a water-mixing experiment as equipment is tested near the Limnology pier on Lake Mendota at the University of Wisconsin-Madison on July 9, 2009. The experiment, which involves a device that resembles a parachute with an inflatable ring, brings water from the bottom of a lake to the surface and raises the temperature of the deeper water. The experiment has implications for studying the effects of global warming as well as the effects of water temperature change on invasive species in lakes.
Photo: Bryce Richter
Date: July 2009
High-resolution JPEG

Caption: A device that resembles a parachute with an inflatable ring floats to the lake surface while being utilized in a test of water-mixing equipment near the Limnology pier on Lake Mendota at the University of Wisconsin-Madison on July 9, 2009. The experiment brings water from the bottom of a lake to the surface and raises the temperature of the water. The experiment has implications for studying the effects of global warming as well as the effects of water temperature on invasive species in lakes.
Photo: Bryce Richter
Date: July 2009
High-resolution JPEG